US3688910A

US3688910A - Hand pump

Info

Publication number: US3688910A
Application number: US23319A
Authority: US
Inventors: Fielding G Johnson; James A Green
Original assignee: Hydrodata Inc
Current assignee: Hydrodata Inc
Priority date: 1970-03-27
Filing date: 1970-03-27
Publication date: 1972-09-05
Anticipated expiration: 1989-09-05

Abstract

A fluid pumping device having a fluid containing container; a container frame; means for puncturing the container to allow air to enter and means for puncturing the base of the container to remove fluid therefrom. The container is mounted on a pumping assembly; the pumping assembly comprises an inlet port, an outlet port, filter means and piston means for pumping fluid from the container through the filter to a fluid delivery means.

Description

United States Patent Johnson et al.

[ Sept. 5,1972

[ HAND PUMP [72] Inventors: Fielding G. Johnson, Santa Ana; James A. Green, Costa Mesa, both of Calif.

[73] Assignee: l-Iydrodata, lnc., Costa Mesa, Orange, Calif.

[22] Filed: March 27, 1970 21 Appl. No; 23,319

[52] US. Cl. ..2l0/233, 55/385, 2lO/4l6 I5 I] Int. Cl. ..B0ld 35/02 I58] Field ofSearch ..210/233,235,24|, 416;

[56] References Cited UNITED STATES PATENTS 3,527,029 9/1970 Kirscher ..55/385 2,902,161 9/1959 Humbert, Jr. et al..2|O/24l X 3,394,8 l 2 7/1968 Cohen et al ..2lO/24l X FOREIGN PATENTS OR APPLICATIONS 590,618 7/l947 Great Britain ..2lO/233 Primary Examiner-John Adee Att0rneySpensley, Horn and Lubitz I 57] ABSTRACT A fluid pumping device having a fluid containing container; a container frame; means for puncturing the container to allow air to enter and means for puncturing the base of the container to remove fluid therefrom. The container is mounted on a pumping assembly; the pumping assembly comprises an inlet port, an outlet port, filter means and piston means for pumping fluid from the container through the filter to a fluid delivery means.

7 Claims, 12 Drawing Figures Patented Sept. 5, 1812 3,688,910

4 Sheets-Sheet 4 jvrsmef.

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075M455 A. GR EK,

HAND PUMP BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an apparatus for pumping fluid from a source to a fluid receiving reservoir while keeping said fluid free from contamination. More particularly, this invention relates to an apparatus for pumping hydraulic fluid from a closed container to a reservoir in a vehicle utilizing said fluid while cleaning said fluid and maintaining it in a contamination free condition.

2. Description of the Prior Art All components of hydraulic systems contain some contamination such as metal particles from machining and grinding, particles of abrasive compounds from honing and lapping, dirt from hands and tools and the like. More contamination is introduced during assembly of the system. in modern aircraft, for example, hydraulic fluid is pumped into the aircraft under pressure. The fluid originally in the container is generally contaminated as is the hose nozzle through which the fluid is pumped and the permanent bulkhead attachment to which the hose is connected. Generally, to recondition the fluid, a hand operated fill stand is used which consists of a reservoir, a hand pump, a filter and delivery hose.

The contamination problem has been partially solved by installing a filter element into the line from the hydraulic pump which pumps the fluid into the aircraft. This helps to remove contamination found in the original fluid reservoir. However, prior art apparatuses still require the opening of the original container in such a manner that contamination from the atmosphere can seep into the fluid in the container. When this occurs, the amount of unused fluid remaining in the container must be discarded and cannot be used at a later date. The problem still remains of contamination gathering in the hose nozzle and in the bulkhead attachment to which the nozzle is fitted for pressurized fluid delivery. The contamination in the original fluid container, from the nozzle, and in the bulkhead is of very small particle size and difficult to detect. The primary source of contamination is the atmosphere and the hands of servicing personnel. Furthermore, the interior of the delivery hose may deteriorate after continued exposure to hydraulic fluid. These hose particles then gather in a nozzle end and tend to contaminate the fluid as it flows into the bulkhead. This contamination causes severe damage in aircraft hydraulic systems. No prior art system is available for opening hydraulic fluid containers in such a manner that no contamination can be introduced into the fluid and for flushing the delivery hose nozzle or the bulkhead attachment without wasting fluid and occasionally flushing some of the contamination further into the hydraulic system. Furthermore, no prior art flushing stands exist which are able to accommodate hydraulic fluid containers of both circular and rectangular configuration.

Accordingly, it is a primary object of the present invention to provide a hydraulic fluid flushing system in which the hydraulic fluid container can be opened while remaining sealed on its top surface and from which the fluid is pumped and filtered to be delivered to a fluid reservoir in a contamination free state.

Another object of the present invention is to provide a manually operated fluid pumping system which pumps contamination free hydraulic fluid from a container through a filter unit and through a flushing device into an aircraft bulkhead.

Still another object of the present invention is to provide a flushing stand in which a container of hydraulic fluid can be punctured by the activation of a lever located on a container holding assembly, the container remaining sealed around the periphery of the puncture.

Yet another object of the present invention is to provide a frame assembly for a flushing stand in which containers of either circular or rectangular configuration can be accommodated.

SUMMARY OF THE INVENTION In one of its broadest aspects, the invented fluid pumping device comprises a frame assembly, the frame assembly being adapted to receive containers of fluid to be pumped; means attached to the frame assembly for puncturing a fluid container so that air may enter the container and fluid may be removed from the container, the means being adapted to puncture a container such that no contamination can enter the container, conduit means connected to a pump means for puncturing a container on the bottom thereof so that fluid can be withdrawn from the container; pump means removably connected to a fluid container, the pump means being adapted to pumping fluid from the container to a delivery hose; filter means located within the pump means for removing contamination from fluid being pumped, and a delivery hose attached to the pump means for conducting fluid from the pump means to a fluid reservoir.

One significant advantage of the invented pumping device is that the puncturing means, attached to the frame assembly, punctures a fluid container in the side instead of as in the prior art devices in the top. This prevents contamination from readily entering the container. Furthermore, the puncturing means seals the point at which the puncture occurs, thus preventing any contamination from entering at the puncture hole and also creating a slight vacuum in the container. The vacuum so created causes entrained air within the hydraulic pump to be drawn to the surface and thereby preventing any trapped air to enter the hydraulic system being serviced. Since the container remains sealed off from atmospheric contamination during the pumping operation, any fluid that is not used can be retained in the container and can be used at a later date. This feature prevents substantial amounts of hydraulic fluid from being wasted. Another advantage of the invented device is that the frame assembly is so constructed that it can accommodate containers of both circular and rectangular configuration. This provides a great advantage because hydraulic fluid in the field is generally provided in both types of containers. Yet another unique feature of the invented pumping device is that a filter unit within the pump is so constructed that unless it is inserted and properly in place, no pumping action can take place. This prevents any inadvertent use of the device without the filter unit being in place. There is thus provided an efficient and ruggedly constructed pumping device for removing hydraulic fluid from a closed container such that the fluid remains contamination free and for delivering the fluid to a reservoir in a vehicle such as an airplane.

The novel features which are believed to be characteristic of the invention, both as to its organization and method of operation, together with further objects and advantages thereof will be better understood from the following description considered in connection with the accompanying drawing in which a presently preferred embodiment of the invention is illustrated by way of example. It is to be expressly understood, however, that the drawing is for the purpose of illustration and description only, and is not intended as a definition of the limits of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective of the invented fluid pumping system;

FIG. 2 is a side elevation partially sectioned of the pumping device;

FIG. 3 is a side elevation partially sectioned of the puncturing means;

FIG. 4 is a view in the direction 44 of FIG. 3;

FIG. 5 is a view in the direction 55 of FIG. 6;

FIG. 6 is a side elevation partially sectioned of the pumping device;

FIG. 7 is an end elevation of the pumping means;

FIG. 8 is a plan view partially sectioned of the container puncturing device;

FIG. 9 is a view in the direction 9-9 of FIG. 8;

FIG. 10 is a view in the direction 10-10 of FIG. 6;

FIG. 11 is a plan view of the frame assembly for receiving round cans; and,

FIG. 12 is a plan view of the frame assembly for receiving rectangular cans.

DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference now to the drawings, there is shown a fluid pumping system comprising a carrying stand generally designated A, a container receiving frame assembly designated 8 and a manually operated fluid pumping assembly with a delivery hose connected thereto designated C.

More specifically now, with reference to FIG. 1, the carrying frame A comprises a tubular frame member 10 having a vertical portion and a horizontal portion. Flat boards 11 are placed across the tubular frame members of the horizontal portion so that the pumping assembly C may be mounted thereon as well as replacement containers and frame assemblies. Frame 10 is adapted to being mounted on wheels or on a dolly so that it may easily be transported from one location to another.

With reference now to FIGS. 1,2, 11 and 12, there is shown the container holding frame assembly designated generally B. The frame assembly comprises a frame base 20, two vertical side members 180 and 18b and a frame cross-bar 16 which is pivotally connected at one end to the top of vertical member 180. The frame base is of such a configuration as best seen in FIGS. 11 and 12, that it has a longitudinal direction for accommodating rectangular cans and a circular midsection so that circular cans can also be accommodated. Frame base is adapted to receiving containers so that the vertical side walls 180 and 18b are adjacent the walls of the container while the side walls 21 of the frame base extend vertically to a height sufficient to retain the containers securely within the base. Crossbar 16 is pivotally attached at one end to the top of vertical member 180 and can be raised to a vertical position and lowered to a horizontal position. When cross-bar 16 is raised, a container can be inserted into the opening between vertical members 180 and 181;. On the underside of cross-bar 16 is a bumper 22 preferably of rubber which is fixedly attached to the cross-bar. Bumper 22 is adapted to provide a positive pressure in the downwardly direction against the top 13 of the container thereby forcing the container firmly into the base 20 so that the bottom of the container is punctured as more fully described hereinafter.

Fixedly attached to the underside of cross-bar 16 at an end opposite to the pivotal attachment and depending from the underside of said bar is a cam member 60. Cam member 60 has a generally conical shaped lower portion and a reduced diameter neck portion 64. As best seen in FIG. 3, when cross-bar 16 is in the lowered horizontal position, cam member 60 activates a pointed conduit member 62 as described hereinafter. Centrally located in base member 20, there is an orifice 25 as best seen in FIG. 6 which permits the introduction through the base of the frame of a spout member 80.

With reference now particularly to FIGS. 2, 3, 4 and 9, there is shown a puncturing means 19 which is fixedly attached to the top end of vertical member 18b adjacent the side of a container 12. Puncturing means 19 comprises a housing 17 which is permanently attached adjacent the top end of vertical member 18b by means of a screw 170. A generally cylindrical opening 55 extends vertically through housing 17. The opening 55 is adapted to receive cam member 60 when cross-bar 16 is in the lowered position. A threaded member 56 is threaded into the side of housing 17. A locking pin 66 having a protrusion 67 extends transversely through housing 56. A spring 68 is circumferentially disposed around locking pin 66 within housing 56 and urges the pin in such a manner that protrusion 67 extends into the generally cylindrical orifice S5. The protrusion 67 extends through a front plate 70 of housing 56. Locking pin 66 is adapted to being manually withdrawn against the urging of spring 68 so that protrusion 67 can be withdrawn from cylindrical orifice 55. Located within the wall of housing 17 adjacent a container is a threaded member 63 having therein an orifice 65 and adapted to receive a horizontally disposed pin 72. Member 72 is disposed horizontally within an orifice in housing 17 and has a hollow pointed conduit portion 62 attached thereto. A spring 69 urges member 72 into the generally cylindrical orifice 55. In that position, conduit member 62 is withdrawn within orifice 65. Puncturing member 72 has a narrowed neck portion 50 into which is disposed an 0-ring sealing member 500.

An air inlet port 51 is provided through the stem of conduit member 62. Air is provided to pointed conduit member 62 by means of an orifice 52 as best seen in FIG. 8. A threaded housing 53 is threaded into housing 17, housing 53 having an orifice 52 passing from the atmosphere to pointed conduit member 62. A filter 54 is located within the housing and is adapted to filter all air entering orifice 52 from the atmosphere. A ball check valve 56 is located adjacent orifice 52 and is urged against said orifice by spring 560. When approximately 3% lbs. of vacuum is developed in a punctured container the ball check valve 56 is opened and allows filtered air to enter conduit member 62. Thus, orifice 52 allows filtered air to enter conduit member 62 but prevents any fluid from exiting because of check valve 56.

When cross-bar 16 is in the lowered position, cam member 60 is positioned downwardly into the generally cylindrical orifice 55 thereby urging

members

67 and 72 forwardly into the walls of housing 17 and out of orifice 55. As member 72 is urged forwardly by the cam 60, pointed conduit member 62 is urged out through orifice 65 and punctures the adjacent wall of a container. A neoprene seal 59 or similar type of material that is resistive to hydraulic fluid deterioration, is interposed between the wall of the container around pointed conduit 62 and is attached to housing member 63. Thus, when pointed conduit member 62 punctures the side of the container, the site of the puncture is sealed by sea] 59 while air is allowed to enter through filter 54 and conduit 52 passed check valve 56 and through conduit 62 into the container. There is therefore provided sufficient air pressure to allow fluid to be pumped from the container. In the preferred embodiment of the invention, air is allowed to bleed into the container until the pressure within the container is two to three pounds of vacuum. This vacuum causes entrained air in the lower part of the hydraulic system and air entrained in the hydraulic fluid to be drawn to the surface.

With reference now to FIGS. 1, 5, 6 and 10, there is shown in detail pump assembly designated generally C. The pump assembly comprises a pump housing block 30 which in the presently preferred embodiment of the invention is made of an aluminum casting into which openings and conduits are machined. The housing block 30 is generally rectangular and has hollowed our portions within it adapted to receive the cylinder and piston of a pump and a filter unit and having orifices leading from the filter unit to the pump as will be hereinafter more fully described.

Pump housing block 30 comprises a threaded housing shell 97 and a threaded cap member 98 which is adapted to threadably engage housing shell 97. An 0- ring 99 is interposed between the cap and the end of the housing shell 97 to seal the structure. A threaded block section 94 is threadably engaged to housing shell 97 and extends vertically therefrom. A threaded housing member 88 is adapted to threadably engage vertically extending block 94. Threaded housing 88 has a pointed spout member 80 extending vertically from the upper end thereof. A ball valve 87 is located within housing 88 in such a manner that fluid entering spout 80 can flow through the housing through orifice 92 and into the filter element of housing block 97. In the presently preferred embodiment of the invention, ball valve 87 can conveniently be made of nylon so that it is resistant to hydraulic fluid passing through spout 80.

Longitudinally disposed within housing shell 97 and coaxial therewith is a filter unit 100. The filter unit is generally cylindrical and one such unit is manufactured by Bendix Corp. and is made of paper. The filter unit is terminated at its forward end by a cylindrical flange 108 which is adapted to receive the forward assembly of the filter unit. Extending through the center bore of the cylindrical filter unit 100 and generally coaxial therewith is a cylindrical conduit member 104. The conduit member 104 is threaded and has a machined head 103 located at the end opposite the threading. Conduit member 104 therefore can be threaded into the correct position and fixedly attached to block housing 97 by grasping head 103 with a chuck tool and rotating member 104 until it is screwed into position. The filter unit 100 can then be inserted into position over the fixed conduit member 104. Fluid from the filter unit 100 enters conduit member 104 through inlet ports 102 in the walls of said conduit member. Connecting brackets 114 fit over filter shoulders 108 and sleeves 112 are inserted between the inside walls of the filter and the outside walls of the conduit member 104. The ends of sleeves 112 abut connecting brackets 114 when in position. A spring 110 presses against the forward end of the block and against the ends of sleeves 112 urging them towards inlet ports 102. Sleeves 112 slidingly engage the outside walls of conduit member 104 and the inside shoulders 108 of the front end of the filter member. An O-ring seal 116 is provided to seal the sleeves 112 and the outside wall of housing 104. The forward end of conduit member 104 has an orifice 106 therein which allows fluid to travel along conduit 107 to the pump assembly as hereinafter more fully explained. When filter unit 100 is in position, flange 108 at the forward end of the filter urges against the connecting brackets 114 which in turn urge sleeves 112 against the force of spring 110. lnlet ports 102 of conduit member 104 are thereby unobstructed to allow fluid to enter. When filter unit 100 is not in place, spring 110 urges sleeves 112 forwardly and causes them to slide along the outside wall of conduit member 104 until inlet ports 102 are covered by the sleeves. This closes off the inlet ports and prevents fluid from entering. Thus, is the filter 100 is not correctly in place, no fluid can enter conduit member 104 and therefore no fluid can be pumped.

A mounting plate 86 is affixed flush with the top of housing 88 and is adapted to fit against the bottom of frame base 20 adjacent indentations 84. In this position, the spout protrudes through orifice 25 in the bottom of frame base 20 and punctures and bottom 12a of a container. Interposed between the bottom 12a of the container and the bottom of frame base 20 is a disc seal 82 which is preferably made of neoprene or similar type of material that is resistive to hydraulic fluid deterioration. Thus, when spout 80 punctures the bottom 12a of the container, seal 82 closes around the spout and prevents any leakage of fluid. As spout 80 penetrates the bottom of the container 12, fluid can enter the spout which is hollow and proceed passed ball valve 87 through orifice 92 into the filter. Filter then removes contamination from the fluid and allows the fluid to pass through inlet ports 102 and out of conduit member 104 through orifice 106 into conduit 107 to the pump. Ball valve 87 prevents any fluid from the filter unit 100 backing up during the pumping action of piston 34. The ball valve 87 also closes off orifice 92 when pumping action stops thereby preventing any further fluid from passing into the filter unit.

With reference particularly now to FIGS. 5, 6, 7 and 10, there is shown the pump assembly for pumping fluid from container 12 through the filter unit and to a delivery hose. The pump cylinder 38 is disposed within aluminum housing block 30 transversely to the direction of filter unit 100 and conduit member 104. The manually operated pump comprises a cylinder sleeve 38, containing a piston 34 which slidingly engages the inside walls of the cylinder sleeve. The cylinder piston 34 comprises a cylinder head 340, a reduced neck section 34b, an O-ring seal 34c, and a teflon ring 34d, between the cylinder head and the body of cylinder 34 in the reduced neck area 34b to prevent the by-passing of any fluid passed cylinder head 34a. A teflon insert 38a affixed to cylinder 38 will make contact with teflon ring 34d, affixed to cylinder piston, during pumping action. This feature prevents metal to metal contact during pumping action and thereby drastically reduces the generation of sharp partical contamination created when metal to metal contact is made during pumping action. Cylinder sleeve 38 is retained within cluminum housing block 30 by a retaining assembly 39 which comprises generally a cylindrical ring member circumferentially fixed to the cylinder sleeve 38 and attached to housing block 30 by a plurality of bolts 39a.

Piston 34 is activated within cylinder sleeve 38 by a pump lever arm 32 which is rotatably interposed between two parallel driving plates 35 and rotatably connected thereto by shaft 33. The lower end of lever arm 32 is interposed between two parallel plates 37 extending from housing block 30 and is rotatably connected thereto by pivot pin 36. Lever arm 32 can be activated by pulling on handle 40 which is fixedly connected to the top of lever arm 32. Thus, a pumping action is accomplished by moving handle 40 upwards and downwards. When handel 40 is pulled upwards, piston 34 is pulled out of the cylinder sleeve 38 allowing fluid to enter the top of the cylinder; when handle 40 is pushed downwardly, cylinder 34 is pushed into the cylinder and forces fluid out of the cylinder into a conduit. Thus, fluid can be expressed from the pump assembly into the delivery hose 42 by a constant up and down motion of pump arm 40.

Fluid is pumped through filter member 100 when piston 34 moves downwardly as best seen in FIG. and draws fluid out of orifice 106 in conduit member 104 through conduit 107 and downwardly into conduit 118 into the top of cylinder 38. When piston head 34a is moved in the upwardly direction, it urges fluid in the top of cylinder 38 upwardly through conduit 118 and along conduit 111 through check valve 127 and into a delivery hose 42.

Referring now to H08. 5, 6 and 10, conduit 119 extends from conduit 11] and is adapted to pass fluid through check valve 130 to bypass conduit 122 which recirculates fluid back into filter unit 100.

Check valve 130 comprises a threaded housing portion 131 which is threadably engaged within aluminum housing block 30. A threaded member 138 is screwed through housing 131 and extends into orifice 135 of the housing. The end of threaded member 138 comprises an extending pin 134. Pin 134 is adapted to urging ball 136 into the neck of orifice 119. A spring 132 extends circumferentially around pin 134 and and extends beyond the end of the pin to engage ball 136. In the presently preferred embodiment of the invention, ball 136 is a stainless steel sphere of approximately inch diameter. Spring 132 is designed to yield at a fluid flow pressure in excess of lbs. When the fluid flow pressure exceeds 70 lbs., ball 136 is urged upwardly allowing fluid to enter into conduit 119 and into orifice 135, then out through by-pass conduit 122 shown in FIG. 6 and back into the filter unit. Thus, a fluid flow pressure of 70 lbs. cannot be exceeded by the pumping mechanism. Any fluid and excess pressure is bypassed back into the filter unit. Ball valve 130 can be regulated also to operate at about 300 lbs. This is accomplished by screwing threaded member 138 downwardly into the housing 131 until ball 136 is urged against the opening in conduit 119 with sufficient force so that only fluid flow pressure in excess of 300 lbs. can force the ball upwardly against the urging of spring 132. Thus, in some instances, the pumping device will operate at 300 lbs. and any fluid at a pressure in excess of 300 lbs. will be bypassed by means of bypass conduit 122 back into filter unit 100.

At the closed position of check valve 130, fluid is pumped by piston 34 through conduit 118, through conduit 111, and through check valve 124. Check valve 124 comprises a threaded portion 126 and a spherical ball 12'! located within said housing. Fluid at a pressure of 70 lbs. forces ball 127 away from the orifice of conduit 111 and allows fluid to flow into the delivery hose section 42. Fluid is prevented from flowing back into conduit 11] from the hose when piston member 34 draws fluid into cylinder 38 by the ball 127 which is pulled into the orifice of conduit 111.

In operation, a container 12 containing hydraulic or any other fluid to be pumped into a vehicle reservoir is inserted into the frame base 20 with cross-bar I6 is depressed. Bumper 22 then presses upon the top 13 of container 12 forcing the container downwardly and at the same time cam member 60 causes pointed conduit 62 to pierce the side of the container near the top thereof. Locking pin 66 then engages the narrowed neck portion 64 of the cam and cross-bar 16 cannot be removed. As the container 12 is pressed downwardly by bumper 22, and by additional hand pressure if necessary, spout pierces the bottom of the cam and fluid enters the spout and is passed through ball valve 88 and into filter unit through orifice 92. When approximately 395 lbs. of vacuum has developed within the container, ball 56 of the check valve moves downwardly and allows filtered air to enter through the check valve 52 and into the cam. When it is desired to remove the container, cross-bar 16 can be lifted by withdrawing locking pin 66 manually.

Hydraulic fluid passes through filter unit 100 and through entry ports 102 into conduit member 104 and into conduit 107. This is accomplished by manually pumping handle 40 to cause piston 34 to reciprocate within cylinder sleeve 38. Fluid is then caused to flow through conduit 107 into the top of cylinder 38 and when piston 34 is urged upwardly, the fluid flows through conduit 118 and 111 through check valve 124 into hose 42. Any fluid flow pressure in excess of 70 lbs. causes ball 136 to overcome the urgings of spring 132 and to open conduit 119. Fluid then flows through conduit 119 into bypass conduit 122 and back into filter unit 100. Thus, fluid from conduit 111 entering hose 42 does not exceed 70 lbs. pressure. Fluid is passed along hose 42 through nozzle 48 into a bulkhead reservoir in, for example, an aircraft.

There is thus provided a compact ruggedly constructed fluid pumping device which can accept both round or rectangular containers into the frame assembly. A puncturing device punctures the side of the container to allow filtered air to enter and seals at the site of the puncture thereby keeping any contamination from entering the container from outside atmospheric sources. A unique check valve is provided in the puncturing device 19 so that only filtered air may enter the container to prevent it collapsing when a vacuum develops therein. A slight vacuum is maintained within the container so that entrained air within the hydraulic pump to be drawn to the surface and thereby preventing any trapped air to enter the hydraulic system being serviced. Another significant advantage of the invented device is that a safety mechanism is provided so that when the filter unit is not properly in position no fluid can be pumped. Therefore, all fluid being pumped through the device must pass through a filter. A particularly advantageous feature of the present invention is a check valve located on the housing block whereby it is possible to regulate the pressure at which fluid passes through the pump. To further insure that no contamination remains in hydraulic fluid before it enters an aircraft reservoir, a fluid flushing device is interposed in the hose between the pumping assembly and an aircraft reservoir which insures that all fluid passing through the hose will be decontaminated before reaching the reservoir.

Although this invention has been disclosed and illustrated with reference to particular applications, the principles involved are susceptible of numerous other applications which will be apparent to persons skilled in the art. The invention is, therefore, to be limited only as indicated by the scope of the appended claims.

What is claimed is:

l. A fluid pumping device comprising:

a frame assembly, said frame assembly having a generally L-shaped tubular frame for carrying containers;

a frame base having generally vertical sides, said frame base being adapted to receiving containers of generally circular cross-sections and rectangular crossrsections;

vertical side members fixedly attached to said frame base;

a horizontal cross-bar pivotally attached at one end to one of said vertical side members, said cross-bar being adapted to opening to a substantially vertical position and closing to a substantially horizontal position, sad cross-bar being adapted to activating a puncturing means when in the closed position;

an orifice located on the bottom of said frame base, said orifice being adapted to allowing a pointed conduit means to pass therethrough and puncture a container within said frame;

a puncturing means fixedly attached to said vertical side member opposite the side member to which said cross-bar is pivotally connected, said puncturing means being activated when said cross-bar is in the closed position and said puncturing means being adapted to puncture said container on the side thereof;

a conduit means connected to a pump means for puncturing a container on the bottom thereof so that fluid can be withdrawn from the container;

pump means removably connected to a fluid container, said pump means being adapted to pumping fluid from the container to a delivery hose;

filter means located within said pump means for removing contamination from fluid being pumped; and

a delivery hose attached to said pump means for conducting fluid from said pump means to a fluid reservoir.

2. The structure as defined in claim 1 wherein said conduit means connected to a pump means comprises:

a threaded housing, said housing having a pointed spout member extending upwardly therefrom;

a ball valve located within said housing; and,

an orifice for allowing fluid to flow from said spout through said housing into a filter means, said housing being threadably engaged to the housing of a filter means.

3. The structure as defined in claim 2 wherein said filter means comprises:

a housing having a generally cylindrical bore in its longitudinal direction;

a generally cylindrical filter unit coaxially disposed within said bore, said filter unit having a front end and a back end, and said filter unit having an opening in the front end thereof;

a conduit member extending from inside said filter unit and out of the opening in the front end thereof for conducting fluid from inside said filter unit to a pump cylinder;

means slidably engaging said conduit member for sealing said conduit member when said filter unit is not in place; and,

a threaded cap portion adapted to hold said filter unit in place within said generally cylindrical bore and adapted to threadably engage said housing.

4. The structure as defined in claim 3 wherein said pump means comprises:

a cylinder;

a piston slidably engaging the inside walls of said cylinder;

handle means connected to said piston, said handle means being adapted to cause said piston to reciprocate within said cylinder and to urge said fluid out of said cylinder into a conduit; and,

first conduit means extending from said conduit member of said filter unit into said cylinder and second conduit means extending from said cylinder to an exit port, said pump means being adapted to pump fluid from said filter unit through said cylinder means and out of said exit port to a delivery hose.

. A fluid pumping device comprising:

a holding frame assembly having opposed vertical side members and a frame base, said frame base being adapted to receive containers of fluid of both circular and rectangular cross sections;

a cross-bar pivotally connected to one of said vertical side members at one end thereof, said cross-bar being adapted to being raised into a vertical position or lowered into a horizontal position;

cam means attached at the end of said cross-bar opposite the end pivotally attached to the vertical side member said cam means depending vertically downwards from said cross-bar;

puncturing means located adjacent the top of a vertical side member and adjacent the side of a container, said puncturing means comprising a housing having a tapered generally cylindrical orifice extending vertically therethrough, said orifice being adapted to receive said cam member;

spring loaded pointed conduit means transversely disposed to said vertically extending at its nonpointed end into said orifice;

a spring loaded locking pin transversely disposed within said housing and aligned with said pointed conduit member, the front end of said locking pin being adapted to extend into said vertically extending orifice;

said cam member being adapted to entering said vertically extending orifice when said cross-bar is in the horizontal position and urging said spring loaded pointed conduit means forwardly thereby causing it to puncture a container containing fluid;

air inlet means connected to said puncturing means to allow air to enter said pointed conduit member and said container;

an opening in the bottom of said frame base, said opening being adapted to allowing a spout member to enter said frame base and to puncture a container located within said frame base;

a pumping assembly removably connected to said frame base, said pumping assembly having a puncturing spout, a filter and a manually operated piston pump; and,

a delivery hose for receiving fluid from said pump.

6. The structure as defined in claim wherein said air inlet has a filter means imposed therein and a ball check valve, said valve being open and allowing filtered air to enter when a predetennined condition of vacuum is established in a punctured container.

7. In a fluid pumping device having a frame assembly, puncturing means located at the side of a container, a pumping assembly, filter means and means for withdrawing fluid from the bottom of a container comprising:

a housing;

a hollow threaded member having a pointed conduit member extending upwardly therefrom, said threaded member being adapted to threadably engage said housing;

a mounting plate circumferentially imposed over said hollow threaded member, said mounting plate being adapted to supportably engage a base frame wherein a container is located;

a ball valve located within said hollow threaded member;

an orifice in the bottom of said hollow threaded member to allow fluid flowing from said pointed conduit member passed said ball valve to enter a filter means, said ball valve being adapted to open when fluid is being pumped and to allow fluid from said container to flow through said threaded member into a filter means;

filter means threadably connected to said hollow inlet port, a generally cylindrical filter unit and a conduit member extending from the forwardly end of said filter unit; and, means for selectively sealing said conduit member when said filter unit is not in position.

I t i I! i

Claims

1. A fluid pumping device comprising: a frame assembly, said frame assembly having a generally Lshaped tubular frame for carrying containers; a frame base having generally vertical sides, said frame base being adapted to receiving containers of generally circular cross-sections and rectangular cross-sections; vertical side members fixedly attached to said frame base; a horizontal cross-bar pivotally attached at one end to one of said vertical side members, said cross-bar being adapted to opening to a substantially vertical position and closing to a substantially horizontal position, sad cross-bar being adapted to activating a puncturing means when in the closed position; an orifice located on the bottom of said frame base, said orifice being adapted to allowing a pointed conduit means to pass therethrough and puncture a container within said frame; a puncturing means fixedly attached to said vertical side member opposite the side member to which said cross-bar is pivotally connected, said puncturing means being activated when said cross-bar is in the closed position and said puncturing means being adapted to puncture said container on the side thereof; a conduit means connected to a pump means for puncturing a container on the bottom thereof so that fluid can be withdrawn from the container; pump means removably connected to a fluid container, said pump means being adapted to pumping fluid from the container to a delivery hose; filter means located within said pump means for removing contamination from fluid being pumped; and a delivery hose attached to said pump means for conducting fluid from said pump means to a fluid reservoir.

2. The structure as defined in claim 1 wherein said conduit means connected to a pump means comprises: a threaded housing, said housing having a pointed spout member extending upwardly therefrom; a ball valve located within said housing; and, an oRifice for allowing fluid to flow from said spout through said housing into a filter means, said housing being threadably engaged to the housing of a filter means.

3. The structure as defined in claim 2 wherein said filter means comprises: a housing having a generally cylindrical bore in its longitudinal direction; a generally cylindrical filter unit coaxially disposed within said bore, said filter unit having a front end and a back end, and said filter unit having an opening in the front end thereof; a conduit member extending from inside said filter unit and out of the opening in the front end thereof for conducting fluid from inside said filter unit to a pump cylinder; means slidably engaging said conduit member for sealing said conduit member when said filter unit is not in place; and, a threaded cap portion adapted to hold said filter unit in place within said generally cylindrical bore and adapted to threadably engage said housing.

4. The structure as defined in claim 3 wherein said pump means comprises: a cylinder; a piston slidably engaging the inside walls of said cylinder; handle means connected to said piston, said handle means being adapted to cause said piston to reciprocate within said cylinder and to urge said fluid out of said cylinder into a conduit; and, first conduit means extending from said conduit member of said filter unit into said cylinder and second conduit means extending from said cylinder to an exit port, said pump means being adapted to pump fluid from said filter unit through said cylinder means and out of said exit port to a delivery hose.

5. A fluid pumping device comprising: a holding frame assembly having opposed vertical side members and a frame base, said frame base being adapted to receive containers of fluid of both circular and rectangular cross sections; a cross-bar pivotally connected to one of said vertical side members at one end thereof, said cross-bar being adapted to being raised into a vertical position or lowered into a horizontal position; cam means attached at the end of said cross-bar opposite the end pivotally attached to the vertical side member said cam means depending vertically downwards from said cross-bar; puncturing means located adjacent the top of a vertical side member and adjacent the side of a container, said puncturing means comprising a housing having a tapered generally cylindrical orifice extending vertically therethrough, said orifice being adapted to receive said cam member; spring loaded pointed conduit means transversely disposed to said vertically extending at its non-pointed end into said orifice; a spring loaded locking pin transversely disposed within said housing and aligned with said pointed conduit member, the front end of said locking pin being adapted to extend into said vertically extending orifice; said cam member being adapted to entering said vertically extending orifice when said cross-bar is in the horizontal position and urging said spring loaded pointed conduit means forwardly thereby causing it to puncture a container containing fluid; air inlet means connected to said puncturing means to allow air to enter said pointed conduit member and said container; an opening in the bottom of said frame base, said opening being adapted to allowing a spout member to enter said frame base and to puncture a container located within said frame base; a pumping assembly removably connected to said frame base, said pumping assembly having a puncturing spout, a filter and a manually operated piston pump; and, a delivery hose for receiving fluid from said pump.

6. The structure as defined in claim 5 wherein said air inlet has a filter means imposed therein and a ball check valve, said valve being open and allowing filtered air to enter when a predetermined condition of vacuum is established in a punctured container.

7. In a fluid pumping device having a frame assembly, puncturing means locateD at the side of a container, a pumping assembly, filter means and means for withdrawing fluid from the bottom of a container comprising: a housing; a hollow threaded member having a pointed conduit member extending upwardly therefrom, said threaded member being adapted to threadably engage said housing; a mounting plate circumferentially imposed over said hollow threaded member, said mounting plate being adapted to supportably engage a base frame wherein a container is located; a ball valve located within said hollow threaded member; an orifice in the bottom of said hollow threaded member to allow fluid flowing from said pointed conduit member passed said ball valve to enter a filter means, said ball valve being adapted to open when fluid is being pumped and to allow fluid from said container to flow through said threaded member into a filter means; filter means threadably connected to said hollow threaded member having said conduit extending upwardly therefrom, said filter means having an inlet port, a generally cylindrical filter unit and a conduit member extending from the forwardly end of said filter unit; and, means for selectively sealing said conduit member when said filter unit is not in position.