FR2488659A1 - MANUAL PUMP WITH SEVERAL EVACUATIONS - Google Patents

Abstract

THE INVENTION CONCERNS THE PISTON PUMP INDUSTRY. A MAIN PISTON SLIDES IN A PIVOTING CYLINDER AT WILL TO SELECT ONE OF THE EVACUATION CHANNELS ARRANGED IN A CROWN. AN AUXILIARY PISTON DRIVEN BY THE MAIN PISTON RELEASES THE PUMP DISCHARGE CHANNEL AT THE START OF THE DISCHARGE STROKE AND THE CLOSURE AT THE START OF THE SUCTION STROKE. APPLICATION, ESPECIALLY TO IRONING IRONS.

Description

Manual pump with several evacuations.

  The present invention relates to a manual pump of which

  the evacuation can be directed at will in various directions.

  This problem is solved in a conventional manner by a

  tif pivoting, orientable, arranged outside the clean pump-

  and used as a distributor.

  In fact, a multi-way valve is used at the

pump outlet.

  The object of the invention is to solve this problem

simple, compact and inexpensive.

  The invention relates to a selectively multi-directional, selectively evacuated pump, characterized in that it comprises a main piston sliding against a return spring in a cylindrical body which can be swiveled by means of a pivoting mechanism. blind bottom of said cylinder in a sealed housing adapted to a fixed base; in that the base has at least two separate discharge channels, distributed angularly and opening into the housing in a

  annular zone that runs, during the rotation of the cylinder,

  dre, an eccentric orifice of a discharge channel opening at the bottom of the cylinder; in that the main piston is extended by a blind tubular actuating rod projecting outside the cylinder; in that an auxiliary piston extended by a tubular shaft, whose inner channel communicates with the inside of the cylinder, slides coaxially in the blind tubular stem of the main piston which drives it by friction

  only in the beginning of his push and pull races

  between a rest position where the auxiliary piston seals the inlet of the discharge channel and an active position where the auxiliary piston discovers the

  discharge; and in that the bottom of the cylinder is extended axially

  a non-return valve allowing the aspiration of the liquid to be pumped from a supply pipe

  extending the valve and prohibiting backflow.

2. 2488659

  The return spring can be interposed between the main piston and a sealing ring resting on a shoulder of the bottom of the cylinder, the. sealing ring serving as an abutment

  for the auxiliary piston in the rest position.

  It is advantageous for the shoulder of the cylinder bottom to be hollowed out by at least one radial groove-leading into an annular groove in which the discharge channels open. The blind tubular rod of the main piston may internally have at least one longitudinal groove establishing a communication between the inside of the cylinder and

  the inner channel of the tubular rod of the auxiliary piston.

  In one embodiment, the outer wall

  of the auxiliary piston rod and the inner wall of the.

  I5 main piston rod present complementary means

  snap-on snap-fastening ensures snap-in

  the age with subjection in axial translation of the. pistons

  only at the beginning and end of the main piston stroke.

  For some practical achievements, a digital pushbutton

  it can be inserted by force on the blind end of the

main piston rod.

  At least one of the evacuation channels may open into a spray nozzle, and the rotating cylinder body

  can be extended radially by an orientation handle.

  Among many practical applications that can be envisaged for a pump according to the invention, mention may be made of the controls for distribution of vapors and sprays for irons.

  ironing, as well as applications in cosmetics, pharmaceuticals and

  Depending on the application, it is advantageous to be able to distribute a product under

  different forms ranging from, for example, jet to spray-

fine.

  The invention will be better understood on reading the

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS AND DETAILED DESCRIPTION OF THE DRAWING DRAWINGS, which represent by way of non-limiting examples, 3.

  an embodiment of the invention.

  In these drawings, FIG. 1 is an elevation view of a pump according to the invention, FIG. 2 is a diagrammatic view, in elevation and in section, of the pump of FIG. 1 in the rest position, FIG. is a view similar to that of Figure 2 of the pump in the discharge position, Figure 4 is a view similar to that of Figures 2 and 3 in the direction selector suction position I0 having been rotated 180, Ot the FIG. 5 is a view from above of the pump of the

figure 1.

  In these drawings, the same organs are designated by

  the same digital referencing.

  IS The pump shown in the drawings comprises a base in which rotates a cylinder body 2 inside.

  which slides a main piston 3 capped with a pusher 4.

  The base 1 has two connecting ends 5 and 6

  to a suction tube 7 and to a discharge tube 8, respec-

  tively. The endpiece 6 axial is continued by a conical flare 9 serving as a seat for a ball 10 to form

  a non-return valve at the suction of the pump.

  The conical flare 9 extends axially by a

  cylindrical portion 11 in which slides an auxiliary piston

  area 12 whose hollow rod 13 slides frictionally in the

blind hollow stem 14 of the piston 3.

  The hollow rod 13 of the auxiliary piston 12 has two

  groups of two nerv res 15 and 16 between which is snapped an inner rib 17 of the blind hollow rod 14. This rod 14 is hollowed inside two grooves

longitudinal 18, 19.

  The head 20 of the main piston 3 serves as a stop for a return spring 21 supported by its other end 'on a sealing washer 22, itself bearing on a

  annular bearing surface 23 at the bottom of the main cylinder 40.

  The annular bearing surface 23 is hollowed out with a radial groove 24 opening into a bore parallel to the axis of the cylinder

  and constituting the delivery channel 25 of the pump.

  The base 26 of the cylinder body 2 is maintained in

  rotation by snapping into an open housing 27 of the

  1. In the bottom of this housing are dug two discharge channels 28, 29 which open into an annular zone I0 that runs through the discharge channel 25 when the body of

cylinder 2 pivots in the base 1.

  The evacuation channel 28 communicates with an external tubing 30 which ends with a spray nozzle 30a, while the evacuation channel 29 communicates directly with

  the discharge tibe 8 for another use or possible

  the return to the supply tank of the tube 7.

  The pump body 2 is extended radially by an orientation handle 31 which favors the manipulations

  of the device for selecting the selected evacuation channel.

  A conical narrowing 33 of the open end of the body

  pump 2 serves as rest stop for the piston 3.

  The entire pump can be attached directly to the wall 32 of the liquid reservoir to be dispensed. In this case, two longitudinal grooves 35 and 34 dug in the wall

  outer end of the nozzle 6 ensure the venting of the container.

  Incidentally, the holding-in-place of the pump body 2 in the base 1 is reinforced by a snap at 36 of the end of the pump body 2 surrounding the conical portion 9

forming a valve seat.

  This double latching at 27 and 36 prevents any deformations likely to affect the seal between the bottom of the pump body 2 and the housing thereof.

the base 1.

  4. The operation of such a pump is as follows

  In the rest position (FIG. 2), the piston 3 is

  The rib 17 of the rod of the main piston 14 is snapped between the two annular annular ribs 16. The head 37 of the auxiliary piston 12 is thus applied in abutment against the washer 22 and sealing the access to the discharge channel 25. The ball 10 seals between the

  pump body 2 and the suction pipe 7.

  The pump casing 2 is pivoted by means of the handle 31 facing the chosen discharge channel 28 in FIGS. 2 and 3, 29 in FIG.

  Thus, at rest, the pump is sealed.

  If we assume the pump initiated by some manipula-

  I5 preliminary, the inside of the pump body 2 is filled with liquid to be dispensed, retained by the non-return valve

  constituted by the ball 10 in its cylindrical seat 9.

  If the push-button 4 is then pressed to discharge the liquid and distribute it through the chosen discharge channel 28 in FIG. 3, the main piston 3 pushed back into its delivery path drives the auxiliary piston 12

  until its head 37 comes to a stop against a small

  38 close to his resting position.

  At this time, the groove 24 and consequently the discharge channel 25 are released, and the liquid discharged by the head 20 of the main piston 3 is discharged through the channel 30 to

the spray nozzle 31.

  During IDute the pusuite of the discharge stroke of the main piston 3, the piston 12 remains stationary and its rod

  13 slides inside the blind rod 14 of the main piston

  cipal 3 until the rib 17 of it comes

  click at the end of the discharge stroke in the group of

  ribs 15 of the rod 13 of the auxiliary piston 12 (Figure 3).

  If the handle 31 had been rotated by 1800 (position of FIG. 4), the discharged liquid would not have been discharged 5. through the channel 28 as indicated by the arrows in solid lines in FIG. the channel 29 as indicated by a

  dashed arrow in Figure 3.

  If the pressure exerted on the pusher 4 is released, the main piston 3 is discharged by the spring 21 (FIG. 4) and frictionally drives the auxiliary piston 12 until it abuts against the sealing washer 22 thus closing the radial groove 24 and hence the channel

25.

  I0 The main piston 3 then continues its suction stroke while the auxiliary piston 12 remains stationary, its rod 13 sliding inside the blind rod 14 of the main piston until the rib 17 thereof comes back -to join in the group of ribs

  16 in the rest position (as shown in Figure 1).

  Throughout the suction stroke, the aspirated liquid lifts the ball 10 and reaches the pump body after passing inside the auxiliary piston 13 and grooves 18 and 19 within the piston rod 14

principal 3.

  The pump is then ready for a new use.

  Of course, the invention is in no way limited

  in the embodiment described and shown, it is

  many variants accessible to those skilled in the art, depending on the intended applications and without departing for

that of the scope of the invention.

7.

Claims (8)

  1. Selectively multi-purpose manual exhaust pump   rectionnelle, characterized in that it comprises a main piston sliding against a return spring in a blind cylinder body angularly pivotable by pivoting the blind bottom of said cylinder in a sealed housing adapted to a fixed base; in that said base has at least two separate discharge channels, angularly distributed and opening into said housing in an annular zone traversed, during the rotation of said cylinder, an eccentric orifice of a discharge channel opening at the bottom cylinder; in that said main piston is extended by a blind tubular actuating rod projecting outside said cylinder; in that an auxiliary piston extended by a tubular shaft, whose inner channel communicates with the inside of the cylinder, slides coaxially in said blind tube of the main piston which drives it by friction only in the beginning of its push-backs and suction between a rest position D said auxiliary piston seals the inlet of said discharge channel and an active position o said auxiliary piston discovers said discharge channel; and in that the bottom of said cylinder is extended axially by an anti-return valve allowing suction of the liquid to be pumped from a supply line extending   said valve and prohibiting the backflow.   2. Pump according to claim 1, characterized in that the return spring is interposed between the main piston and a sealing ring resting on a shoulder of the bottom of the cylinder, said sealing ring serving as an abutment.   for the auxiliary piston in the rest position.   3. Pump according to claim 2, characterized in that the shoulder of the cylinder bottom is hollowed at least one radial groove terminating in. an annular groove '2488659   in which the evacuation channels open.   Pump according to one of Claims 1 to 3,   characterized in that the blind tubular stem of the piston   the main body internally has at least one longitudinal groove   connecting the inside of the cylinder with   dre and the inner channel of the tubular rod of the auxiliary piston.   5. Pump according to one of claims 1 to 4,   characterized in that the outer wall of the piston rod   and the inner wall of the main piston rod   pal have complementary snap-fastening means which are passable by sliding ensuring the e. nclick with   in axial translation of said single pistons   at the beginning and end of the main piston stroke.   I5 6. Pump according to one of claims 1 to 5,   characterized in that it comprises a digital pushbutton inserted   by force on the blind end of the main piston rod.   7. Pump according to one of claims 1 to 6, characterized in that at least one evacuation channel opens in a spray nozzle.   Pump according to one of Claims 1 to 7,   characterized in that the pivoting cylinder body is pro-   lined radially by a joystick.