WO1999011390A1

WO1999011390A1 - Compression device

Info

Publication number: WO1999011390A1
Application number: PCT/EP1998/005294
Authority: WO
Inventors: Tilwin Lepsius; Johannes Hubertus Jozef Maria Kelders
Original assignee: Henkel Kommanditgesellschaft Auf Aktien
Priority date: 1997-08-29
Filing date: 1998-08-20
Publication date: 1999-03-11
Also published as: DE19737683C1

Abstract

The invention concerns a comparatively small, light and compact device, for compressing a substance. Said device comprises a housing with at lest a compression chamber (2), wherein is located a piston (3) capable of being displaced in the compressing direction (S), or inversely, betweeen an inoerative position, the compression chamber (2) volume delimited by said piston (3) being then at its maximu, and a compressing position, the volume delimited by said piston (3) being than at its minimu, and means (4) for dricing the piston (3), capable of being manually actuated. Said actuating means (4) have a manual actuating handle (11) and a transmission device (11) connected to said handle and designed to amplify the driving force exerted manually such aht when a constant force is applied on the manual actuating handle (11), an increasing driving force (F) acts on the piston (3) in the compressing direction (S).

Description

Compaction device

The invention relates to a device for compressing a medium, in particular for emptying a cartridge filled with a viscous mass by means of compressed air, with a housing with at least one compression chamber in which a piston is located in the stroke direction between a rest position in which the volume of the compression space limited by the piston is maximum, and a compression position in which the volume limited by the piston is minimal, can be moved back and forth, and means for driving the piston, these drive means being operable by hand.

Compacted media are used on a large scale to drive machines, tools, etc. One could think of pneumatic tools that are operated using compressed air. The advantages of using such a compressed medium for the drive are manifold. With the help of a compressed medium, a force can be transmitted over longer distances and via irregularly shaped paths. In addition, compressed media are usually clean and hardly flammable, and apart from a good seal, they do not require any special measures on the tool.

However, the use of compressed media for the drive has the disadvantage that they are not particularly well suited for small-scale applications. Large compression devices, such as motor-driven compressors, are usually used to compress a medium, with which the medium can be compressed in sufficient quantities to supply a large number of systems or tools. The tools can be connected to the compressor via a line for the compressed medium. However, this only makes sense if there are many pneumatically operated devices in one place, such as in workshops, factories, etc.

In addition, it is known to store compressed media under pressure in containers and to connect the containers to systems and tools for driving through the compressed medium. In practice, this also proves to be less practical for small-scale applications because Containers for storing compressed media must be made robust due to the pressure exerted on them and are consequently heavy.

Cartridge guns for squeezing out a viscous mass, e.g. B. a joint sealant, from cartridges. Usual cartridge pistols have a cartridge holder, a pistol grip and a piston which, when a handle lever attached to the pistol grip is actuated, is pushed onto the front end of the cartridge holder pointing away from the handle, so that the piston of the pistol presses the cartridge base into the cartridge casing and thus the viscous mass from a nozzle tip at the other end of the cartridge.

The application of the highly viscous mass generally requires great care when guiding the nozzle tip in order to apply the mass evenly. With the known cartridge guns, the uniformity of the application depends not only on the speed at which the nozzle tip is guided along the joint, but also on the pressure applied simultaneously to the handle of the cartridge gun. The simultaneous observance of these two parameters when processing the highly viscous mass, namely the speed of the nozzle tip along the joint and the pressure exerted on the pistol grip, makes it difficult to process the contents of the cartridge carefully, especially for do-it-yourselfers.

Cartridge guns are known in which the cartridge base is pressed in the direction of the cartridge nozzle by means of compressed air. Here the viscous mass emerges automatically and evenly from the cartridge nozzle during processing, so that the user can concentrate solely on guiding the nozzle tip along the joint at a constant speed. As already explained above, such cartridge pistols, however, require a compressor for generating compressed air or a storage container for compressed air and are therefore only used by craftsmen. Such a combination of compressor and cartridge gun is too expensive for DIY enthusiasts.

If the compressed air is to be generated manually in a cartridge gun working with compressed air, other problems arise. On the one hand is for squeezing The viscous mass requires a relatively high pressure of at least about 3 bar, which cannot be applied manually without difficulty. On the other hand, the pressure of a compressible medium such as air rises very sharply with increasing compression, so that the force to be exerted by the user's hand on the cartridge gun when the pressure builds up also changes greatly. This, depending on the existing internal pressure required different large manual force is very disruptive for the user, who is used to the usual mechanical cartridge guns to exert a substantially constant manual force on the cartridge gun to squeeze out the viscous mass.

The object of the invention is therefore to develop a comparatively small, light, compact and easy-to-use device for compressing a medium, which is suitable, for example, for driving a single tool.

This object is achieved in the above-mentioned device for compressing a medium in that the drive means have a manual control handle and an associated transmission device for amplifying the driving force exerted by the hand, so that with constant force on the manual control handle one in the stroke direction of the piston increasing driving force acts on the piston.

Since the compression device according to the invention is operated by hand, it can be made compact, light and simple and can be manufactured at low cost. In addition, the device is particularly suitable as a cartridge gun operated manually with compressed air, because on the one hand the user's hand only needs to apply a constant or almost constant force to the drive means in order to exert the force increasing on the piston along the stroke path in the case of compressible media, and on the other hand the force at the end generated the stroke and required to squeeze the viscous mass from the cartridge minimum pressure of about 3 bar as easily and conveniently as the relatively low initial pressure at the beginning of the stroke. In contrast to the usual mechanical cartridge guns, when the required minimum pressure for moving the cartridge base and thus for pressing out the viscous mass has been reached, the user no longer has to actively take care of the squeezing out process, but can concentrate entirely on the nozzle tip of the cartridge evenly to run along the joint to be filled. Only after a long time, when the pressure has dropped below a critical limit due to the increase in volume of the cartridge interior below the cartridge base and the cartridge base no longer moves in the direction of the nozzle tip, the pressure must be built up again manually.

The transmission device advantageously has at least one first lever located between the piston and the hand control handle. The leverage can exert a large force on the medium to be compressed. By means of a lever connected to the piston via a joint, the orientation and thus the force transmission ratio of which depends on the position of the piston, it can be achieved that the manual force is amplified the closer the piston is to its top dead center, that is Position of maximum compression. In this way it can be achieved that, despite constant manual force, a force which increases with the stroke travel acts on the piston. A concrete example of this can be found in FIG. 6 and is described in detail below.

A particularly simple design of the compression device is achieved if the transmission device has at least two articulated levers, one of which is connected to the piston and the other to a point which is fixed relative to the compression space, the hand control grip engaging the articulated connection . Here, too, the manual force is increased the closer the piston is to the position of maximum compression, so that despite the constant manual force, a force that increases with the stroke acts on the piston. A specific example can be found below in the description of FIGS. 1 to 3. In order that operation is as simple as possible, the manual control handle is preferably pivotally connected to the housing and has a sliding surface which interacts with the articulated connection.

The drive means can also be biased towards the rest position of the piston, so that when no force is exerted on them, they return to their starting position and the device is thus always ready for operation.

The device preferably has venting means connected to the compression chamber. The pressure can simply escape through this.

For this purpose, the venting means can have at least one venting opening and a cooperating pressure relief valve that is preloaded by a spring and cooperates with it. Such a pressure relief valve not only opens when the pressure generated exceeds a preset value, but can also be operated by the user, for example to interrupt the operation of a device operated with the aid of the compressed medium, if necessary.

A design which is simple from a constructional point of view is achieved if the pressure limiting valve has a valve body with an actuating arm which projects over the vent opening and is designed to carry out a pivoting movement around an edge of the vent opening. In this way, the pressure relief valve can be opened by pressing the actuating arm. The valve body of the pressure relief valve is advantageously designed as part of the actuating arm and thus pivotable about a free end of the actuating arm.

It is alternatively and particularly preferred if the pressure limiting valve has a valve body and a valve seat as well as an actuating arm projecting beyond the vent opening, which is designed to perform a pivoting movement, the seat of the valve body being formed in the pivotable actuating arm. So the pressure relief valve can be opened by pushing the actuating arm with the seat molded therein upwards, while the valve body at Exceeding a certain predetermined pressure value is simply lifted out of the seat.

In order to ensure a correct pressure build-up in the compression chamber, this preferably has an outlet opening which can be closed by a check valve.

The check valve can have a pin-shaped body located in the outlet opening and delimited by thickened ends, one end being designed to close off the outlet opening and the other end being designed to hold the pin-shaped body in the outlet opening. In this way, a check valve that is simple from a design point of view is created, but is pressure-resistant at relatively high pressures.

A very compact and handy compression device is achieved if the drive means are integrated in a handle and the compression space is directly adjacent to the handle.

This handle can be part of a tool, preferably a cartridge gun, or can be easily connected to a tool for driving through the compressed medium. For this purpose, the device has means for fastening the handle to a container for a viscous mass, in particular joint sealant, which has a piston which can be moved by the compressed medium, e.g. B. has a conventional cartridge base for squeezing the mass. In this way, the compacting device can be used with advantage in connection with such a container, for example a conventional cartridge for a joint sealing compound.

The fastening means can have a threaded part, which is in particular formed in one piece with the walls delimiting the compression space. Alternatively, the fasteners

Have snap connection parts. For an optimal seal between the Container and the handle, a concentric sealing ring arranged in the threaded part is advantageous.

Exemplary embodiments of the invention are described in more detail below with reference to drawings. Show it

1 shows a cross section through a first embodiment of the

Compression device according to the invention, the piston being in the rest position,

Figure 2 is a side view of a second embodiment of the

Compression device in the rest position, wherein the venting means have been removed,

FIG. 3 shows a cross section of the compression device according to FIG. 2 at the end of a compression stroke,

FIGS. 4A to 4C show schematic detailed views from which the functioning of the venting means of the device according to FIG. 1 can be seen,

Figure 5 shows the area of the connection of a container with the

Compaction device according to the invention in a sectional view,

FIG. 6 shows a schematic side view of a variant of the drive means of the compression device according to the invention,

FIG. 7 shows a diagram in which the increase in driving force as the piston stroke increases is shown schematically,

Figure 8 shows a cross section through a third embodiment of the

Compression device according to the invention, the piston being in the rest position, FIGS. 9A-9C show schematic detailed views from which the functioning of the venting means of the device according to FIG. 8 can be seen,

Figure 10 shows the area of the connection of a container with the

Compression device according to Figure 8 in a sectional view,

FIG. 11 shows a diagram in which the increase in driving force as the piston stroke increases for a device according to FIG. 8 is shown schematically,

Figure 12 is a plan view of the compression space and the

Threaded part according to FIG. 10,

FIGS. 13A-13C show a covering and enclosing part attached to the top of the device according to FIG. 8 in longitudinal section, in a view from the rear and in a top view and

Figures 14A u. 14B the operating arm of the venting means of the

8 in longitudinal section and in a view from below.

In all drawings, the same reference symbols have the same meaning and are therefore only explained once, if appropriate.

A device 1 for compressing a medium, for. B. air, comprises a housing with a compression chamber 2, in which there is a piston 3 which is movable back and forth in the stroke direction (represented by arrow S) (Figure 1). The compression device 1 also has means 4 for driving the piston 3, the drive means 4 being designed with constant force on the manual control handle 11 to generate a driving force F on the piston 3 which increases in the stroke direction S of the piston, as curve 63 in FIG Figure 7 shows. The compression chamber 2 and the drive means 4 are integrated in a handle 15, which is on the top by a cover 64 which by means of fastening means 65, for. B. screws, is attached to the handle 15 is completed. The handle section of the handle can be used for easy handling 15 have a projection 43 on the side opposite the hand control handle 11 (FIGS. 2 and 3).

The drive means 4 have a transmission device 5 for amplifying a drive force F exerted by hand. The transmission device 5 is provided with a first lever 6, which is located between the piston 3 and a manual control handle 11 of the compression device. The lever 6 is connected in an articulated manner via an axis 10 to a piston rod 16 which is firmly connected to the piston 3 and can be moved back and forth in a straight line in the stroke direction S. For this purpose, the piston rod 16 has on the underside a bearing roller 18 which is rotatable about the articulation axis 10 and which can be moved along a bearing sliding surface 17 which is part of the handle 15. The opposite end of the lever 6 is connected via a pivot axis 8 to a bearing roller 14 which can be moved along a sliding surface 13 of the manual control handle 11. One end of a second lever 7 is also connected to the axis 8, the other end of which is pivotally connected to the handle 15 via an axis 9. A torsion spring 23 acts on the second lever 7, which is attached to a pin 24 which is fixedly connected to the handle 15 and holds this lever 7 and consequently the manual control handle 11, the first lever 6 and the piston 3 in the rest position shown in FIG. 1 .

The piston 3 consists of a piston disk 20 fastened on the piston rod 16, on which a piston element 21 made of an elastic material is attached, the piston element 21 having a peripheral edge 22 which bears gas-tight against the wall 19 delimiting the compression chamber 2. The piston element 21 has an opening 25 through which a fastening pin 26 attached to the piston disk 20 projects.

The compression device 1 also consists of venting means 27 which are connected to the compression space 2. The venting means 27 have a vent opening 28 and a pressure relief valve 29, which is biased by a spring 30 and closes the vent opening 28 and which can also be operated manually. The pressure relief valve 29 has an actuating arm 54 which projects beyond the vent opening 28 and is designed such that it surrounds an edge 35 of the vent opening 28 as well as that A pivoting movement can be carried out at the end of the actuating arm 54, as will be explained in more detail below. In addition, the compression chamber 2 has an outlet opening 36, which is closed by a check valve 37, the shape and mode of operation of which are also explained in more detail below. Finally, the compression device 1 has means 38 for fastening the handle 15 to a container 39 for a viscous mass, the fastening means in the example shown consisting of a holder with a widened end 40, into which one end 41 of the container 39 is pushed and then by means of a ring 42, which is pushed between the widened end 40 and the wall of the container 39, is clamped in the handle 15.

As already mentioned, the ventilation means 27 comprise a ventilation opening 28 which is connected to the compression chamber 2 via the opening 36 in the top wall 53 and is also connected via a channel 52 to the container arranged in the compression device. The vent opening 28 is closed by the pressure limiting valve 29, which is pivotally connected to a push button 31 via the end 32 of the actuating arm 54. This pushbutton 31 has a peripheral edge 51 which is held by a peripheral edge 34 of a sleeve 33, the sleeve 33 in turn being fastened by a snap edge 50 to the part 49 of the cover 64 which projects around the ventilation opening 28. Between the pressure relief valve 29 and the push button 31 there is a compression spring 30, the elasticity of which has been selected so that the valve 29 is at a certain, preset excess pressure, for. B. 4 bar opens.

If the pressure in the compression chamber 2 does not exceed the preset overpressure level, the pressure limiting valve 29 is at rest, and closes the ventilation opening 28 in an airtight manner (FIG. 4A). If the pressure in the compression chamber 2 and / or in the channel 52, which communicates with the space behind the container 39, exceeds the preset pressure level, the pressure relief valve 29 rises against the force of the biasing spring 30, so that air from the compression chamber 2 and the channel 52 flows in the direction indicated by the arrow OP through the vent opening 28 into the space delimited by the sleeve 33 and the push button 31 (FIG. 4C). This room is not airtight, so that the air in this room Environment can escape. As soon as enough air has escaped and the pressure in the compression device 1 falls below the preset limit value, the valve 29 is closed again by the biasing spring 30.

The pressure relief valve 29 can also be operated by hand. This can be useful if the pressure is to be reduced quickly, for example to interrupt a processing carried out by the resulting pressure. For this purpose, only a pressure force F needs to be exerted on the push button 31, the push button 31 in the sleeve 33 being pressed down until the peripheral edge 51 rests on the edge of the part 49 of the cover 64. The valve 29 is pivoted about the edge 35 of the vent opening 28 so that the opening is released and air under pressure in the direction indicated by the arrow V can escape from the channel 52 and the space behind the container 39 (FIG. 4B). The opening 36 in the head wall 53 of the compression chamber 2 remains closed by the check valve 37 until the pressure in the channel 52 is lower than the pressure in the compression chamber 2, after which the check valve 37 rises, as shown in FIG. 4C.

The check valve 37 also consists of a pin-shaped body 44 which is delimited at the upper end by a hemispherical part 46 and at the lower end by a hemispherical part 45. The hemispherical upper part 46 is adapted to the side wall of a conical valve seat 47 of the outlet opening 36 in the top wall 53 of the compression chamber 2 and thus closes the opening 36 in an airtight manner in the rest position (FIGS. 4A and 4B). The thickened lower part 45 mainly serves to hold the check valve 37 in the opening 36. The thickened lower part 45 and the pin-shaped body 44 of the check valve 37 also have a recess 48 over the entire width of the check valve 37, so that a gas connection is formed between the compression chamber 2 and the conically tapering valve seat 47 of the outlet opening 36.

A threaded connection (FIG. 5) can be used instead of the clamp connection shown in FIG. 1 for fastening the container 39 to the compression device 1. A projecting part 55 with a threaded profile is connected to the rear end 41 of the container 39, the part 55 in Has a channel 57 in the longitudinal direction. The projecting part 55 is screwed into a threaded part 56 of the cover 64, the threaded part 56 having at least one opening connected to the channel 52 for the medium compressed by the compression device 1. For optimal sealing, there is an O-ring 59 between the container 39 and the lid 64, while a profiled sealing ring 58 is inserted between the container 39 and the shoulder 55.

The operation of the device will now be described in detail. After a container 39, e.g. B. a filled with joint sealant cartridge has been attached to the compression device 1, for. B. by means of a threaded, snap or clamp connection, a pressure is built up by repeated actuation of the piston 3 in the compression chamber 2 filled with the medium, usually air, it being possible for operations to be carried out subsequently under the influence of this compressed air, such as, for example Movement of a piston located in the container 39 and not shown here, through which a viscous mass is pressed out of the container 39. In this way, the compression device 1 can be used in connection with the container 39 as a pneumatic gun for joint sealants.

To build up the gas pressure, the hand control handle 1 can be repeatedly pulled towards the handle 15, the hand control handle 11 executing a pivoting movement about an axis 12. During this movement, a force, directed in the example to the right, is exerted on the two levers 6, 7, this force finally being converted into a movement of the piston 3 in the compression chamber 2 which is directed upwards in the stroke direction S. The force exerted by the hand is amplified by the levers 6, 7, the transmission device being designed such that the force F generated at the end of the stroke S of the piston 3 is greatest with constant force on the manual control handle 11 (FIG 7). This is of great importance for the compression of a compressible medium such as air, since the force required for the compression increases comparatively quickly, especially when the volume of the medium is greatly reduced. The compressed medium finally flows out of the compression chamber 2 via the opening 36 opened by the check valve 37, since the pressure in the compression chamber 2 is higher than in the channel 52, which leads to the space behind the container 39. After each stroke of the piston, the lever 7 and consequently the entire drive device 4 and the piston 3 return to the rest position under the action of the biasing spring 23. The elastic side wall of the piston element 21 bends inwards and air flows from the outside via the peripheral edge 22 into the compression chamber 2.

If, for example, an outlet of the container 39 is now opened, the pressure created behind the container 39 will force the mass out of the container 39, the compressed medium gradually expanding again and the pressure consequently falling. The user can now fully rely on the distribution of the viscous mass emerging evenly from the cartridge, e.g. B. along a joint, concentrate without his attention being distracted by the squeezing process. In order to be able to interrupt the delivery of the mass from the container 39 as quickly as possible, the pressure limiting valve 29 can simply be actuated by actuating the pushbutton 31. In addition, the pressure relief valve 29, as explained above, will open automatically if the pressure in the compression chamber 2 exceeds a preset limit value when the pressure builds up (“pumps”).

Although the invention has been explained above with the aid of examples, it is apparent to the person skilled in the art that the described compression device can be varied in many ways within the scope of the invention. For example, instead of a container filled with a viscous mass, a hose could be attached to the compression device 1 so that processing can be carried out at another location with the aid of the compressed medium.

Another example is shown in Figure 6, the solid and dashed lines showing two different positions of the piston 3, 3 'and the drive mechanism. The reference symbols provided with an apostrophe relate to the parts of the device in the position shown in broken lines. Instead of the swiveling manual control handle, a linearly movable control handle 11 'with rod 60 is used, the second lever 7 being omitted. One end of the first lever 6, 6 'is connected to a pin 61, 61' which is displaceable along a sliding surface 62. In this way, a comparable movement of the piston 3 can be achieved, the increase in force proceeding as explained above.

Furthermore, instead of the manually operated pressure relief valve described above, a valve that reacts exclusively to excess pressure and a separate, manually operated vent valve could also be used.

A third exemplary embodiment of the invention according to FIGS. 8 and 14 is explained in detail below, insofar as this exemplary embodiment differs from the example according to FIGS. 1 to 7.

Here, the walls 19 of the compression chamber 2 are formed in one piece with a cover and containment part 124, which is clamped onto the top of the handle 15 (FIG. 8). Details of this cover and containment part 124 are shown in FIGS. 13A to 13C. For attachment to the handle 15, the cover and containment part 124 has four legs 158 which can be inserted into channels 166 (FIG. 8) of the handle 15. The legs 158 each have a bore 159, so that the legs 158 can be secured from the underside with connecting elements such as screws on the handle 15. In this way, the compression space 2 is formed by the handle 15 and the cover and containment part 124.

In contrast to the first and second exemplary embodiments, a spiral spring 123 is attached between the first lever 6 and the second lever 7, which is designed as a tension spring and pulls the manual control handle 11 into the starting position shown in FIG. When the hand control handle 11 is pressed against the handle 15, the spring 123 is stretched.

The piston element 21, which consists of a resilient material and has a different geometric shape than in the first and second exemplary embodiments, is provided with a peripheral edge 22 which is gas-tight on the wall 19 the compression chamber 2 connects. The piston element 21 is provided with an opening 25 through which a fastening pin 26, which is attached to the piston disk 20, is inserted.

FIGS. 9A to 9C show the ventilation device in detail. Here too, only the differences to the ventilation device according to FIGS. 4A to 4C are explained.

The pressure relief valve 29 is located in a seat 132, which forms part of a pivotable operating arm. The pressure relief valve is designed both to carry out a linear movement against the force of the spring 30 and to carry out a pivoting movement about a pivot axis 151 of an operating lever 133, as will be explained below. The spring 30 sits on a pin 131 on the inside of the cover and containment part 124.

The fastening means 38 for attaching a container filled with a viscous mass to the device are designed here as an internal thread 139 of a receiving space, which is made in one piece with the walls 19 of the compression space 2. One end of the container can be screwed into the receiving space 140. In the bottom of the receiving space 140, a concentric groove 142 is provided, in which a sealing ring 141 is inserted, on which the rear wall of the container is pressed in a sealing manner.

The compression space 2 is connected via a channel 52 to a distribution chamber 156 in the receiving space 140 and in this way to the container attached to the device.

The operating lever 133 is formed by two parallel arms 155, between which the seat 132 is arranged (FIGS. 14A and 14B). At one end, the arms 155 are connected to a pivot axis 151 which lies in a recess 165 in the upper wall of the channel 52 and is clamped therein by a locking arm 154 of the cover and containment part 124. The other ends of the arms 155 of the operating lever 133 are movably arranged in two cutouts 149 of the cover and containment part 124 and each have a cutout 157 which serves as a stop, when they come into contact with the top of the relevant recess 149. In this way, the stroke of the operating lever 133 is limited and thus the maximum path of the pressure relief valve 29 is determined.

When a predetermined overpressure value is exceeded, the pressure relief valve 29 is raised against the force of the biasing spring 30, and air from the compression chamber 2 flows through the ventilation opening 28 and the valve 29 according to the arrow OP (FIG. 9C) into the space which is covered by the cover and Enclosure part 124 is limited. This room is not airtight, so that the air can escape from this room into the environment. When the pressure in the device has dropped below the predetermined limit value again, the valve 29 is pressed onto the seat 132 by the biasing spring 30.

To operate the valve 29 by hand, it is sufficient to exert an upward pressure force F on the button 134 of the operating lever 133, which then swivels upward about the axis 151 until the cutouts 157 reach the top of the cutouts 149. The seat 132 is lifted with the valve body 29 from the edge 35 of the vent opening 28 so that this opening is released. Therefore, air under pressure according to the arrow V can escape from the channel 52 and the distribution chamber 156 into the space delimited by the cover and containment part 124 and from there into the environment (FIG. 9B). During this process, the opening 36 remains closed until the pressure in the channel 52 is lower than the pressure in the compression chamber 2 and the check valve 37 is raised (FIG. 9C).

FIG. 10 shows the upper area of the device with the cover and containment part 124 removed and without the valves 29 and 37.

The curve 63 shown in FIG. 11 shows the force F generated on the piston 3 with constant force on the manual control handle 11 as a function of the stroke S of the piston. Here too, the force F generated is greatest at the end of the stroke S, although the curve shape differs from the corresponding curve 63 of the first and second exemplary embodiments (FIG. 7). Reference list

Compaction device

Compression chamber, 3 'pistons

Drive means

Transmission device, 6 'first lever second lever

Swivel axis

Axles 0, 10 'Axles 1, 11' Hand control handle 2 Axis 3 sliding surface 4 bearing roller 5 handle 6 piston rod 7 bearing sliding surface 8 bearing roller 9 wall 0 piston disc 1 piston element 2 peripheral edge 3 torsion spring 4 pin 5 opening 6 mounting pin 7 venting means 8 venting opening 9 pressure relief valve, valve body 0 spring 1 push button 2 end 3 sleeve 4 edge edge

Outlet opening

check valve

Fasteners

Container flared end

The End

ring

head Start

body

Lower part

Top

Valve seat

Recess

part

Snap edge

edge

channel

Head wall

Actuating arm projecting part

Threaded part

channel

Sealing ring

O-ring

pole

pen

Sliding surface

Curve

cover

Fasteners

Coil spring

Cover and containment part

pen

Seat

Operating lever 134 button

139 internal thread

140 recording room

141 sealing ring

142 groove

149 recess

151 swivel axis

154 locking arm

155 arm

156 distribution chamber

157 recess

158 leg

159 hole

165 recess

166 channel

S stroke direction

F driving force

OP flow direction

V flow direction

Claims

claims

1. Device for compressing a medium, in particular for emptying a cartridge filled with a viscous mass by means of compressed air, with a housing with at least one compression chamber (2), in which there is a piston (3) in the stroke direction (S) between a Rest position, in which the volume of the compression space (2) limited by the piston (3) is maximum, and a compression position, in which the volume limited by the piston (3) is minimal, can be moved back and forth, and by means

(4) for driving the piston (3), said drive means (4) being operable by hand, characterized in that the drive means (4) has a manual control handle (11) and a transmission device (5) connected to it to reinforce the transmission Have hand applied driving force (F) so that with constant force on the hand control handle (11) in the stroke direction

(5) of the piston (3) increasing driving force (F) acts on the piston (3).

2. Device according to claim 1, characterized in that the transmission device (5) at least one between the piston (3) and the manual control handle (11) located first lever

(6).

3. Apparatus according to claim 2, characterized in that the transmission device (5) has at least two articulated levers (6, 7), one of which (6) with the piston (3) and the other (7) with one is fixed point with respect to the compression chamber (2), the manual control handle (11) engaging the articulated connection.

4. The device according to claim 3, characterized in that the manual control handle (11) is pivotally connected to the housing and has a sliding surface (13) which interacts with the articulated connection.

5. Device according to one of the preceding claims, characterized in that the drive means (4) are biased relative to the rest position of the piston (3).

6. Device according to one of the preceding claims, characterized by ventilation means (27) connected to the compression chamber (2).

7. The device according to claim 6, characterized in that the ventilation means (27) have at least one ventilation opening (28) and a cooperating, by a spring (30) biased, manually operated pressure relief valve (29).

8. The device according to claim 7, characterized in that the pressure relief valve has a valve body (29) with an over the vent opening (28) projecting actuating arm (54) which is designed to perform a pivoting movement around an edge (35) of the vent opening (28) is.

9. The device according to claim 8, characterized in that the valve body (29) of the pressure relief valve is designed as part of the actuating arm (54) and thus pivotable about a free end of the actuating arm (54).

10. The device according to claim 7, characterized in that the pressure relief valve has a valve body (29) and a valve seat (132) and one via the vent opening (28) projecting actuating arm (133) which is designed to perform a pivoting movement, the seat (132) of the valve body (29) being formed in the pivotable actuating arm (133).

11. Device according to one of the preceding claims, characterized in that the compression chamber (2) has an outlet opening (36) which can be closed by a check valve (37).

12. The apparatus according to claim 11, characterized in that the check valve (37) in the outlet opening (36) located by thickened ends (45, 46) limited, pin-shaped body (44), the one end (46) to this is configured to close the outlet opening (36) and the other end (45) is designed to hold the pin-shaped body (44) in the outlet opening (36).

13. Device according to one of the preceding claims, characterized in that the drive means (4) are integrated in a handle (15) and the compression space (2) directly adjoins the handle (15).

14. The apparatus according to claim 13, characterized in that the handle (15) is part of a cartridge gun, in which a with a viscous mass, in particular joint sealant, filled container (39) can be arranged, which a movable piston through the compressed medium to Squeezing the mass has.

15. The apparatus according to claim 13 or 14, characterized by

Means (38) for fastening the handle (15) to a container (39) for a viscous mass, in particular joint sealing compound, which has a piston which can be moved through the compressed medium for pressing out the mass.

16. The apparatus according to claim 15, characterized in that the fastening means (38) have a threaded part (139) which is in particular formed in one piece with the walls (19) delimiting the compression space (2).

17. The apparatus according to claim 15, characterized in that the fastening means (38) have snap connection parts.

18. The apparatus according to claim 16, characterized by a concentric sealing ring (141) arranged in the threaded part (139).