Hydraulically operated material dispensing system

Abstract

A hydraulic or pneumatic operated paste dispensing device for dispensing material out of a container wherein the container is provided with a nozzle at the front end through which the material is dispensed and a movable cap at the back end of the container wherein the movable cap is configured to move to within the container towards the nozzle while squeezing the material out of the nozzle, the paste dispending device comprising: a reservoir of fluid; a housing having a front opening, wherein the housing is configured to accommodate the container; a resilient fluid receiver contained within the housing and fluidically connected to the reservoir of fluid so as to receive the fluid from the fluid reservoir and extend outwardly from the housing through the front opening.

Description

HYDRAULICALLY OPERATED MATERIAL DISPENSING SYSTEMTECHNICAL FIELD

[0001] The present invention relates to construction utensils. In particular, the invention relates to hand-held material dispensing devices hydraulically operated.BACKGROUND

[0002] Caulk guns are known in the art of construction and are adapted for sealing crevasses or adhering surfaces to each other. Viscous substances such as silicon glue are typically applied through utensils such as a caulk gun, which enable pushing the substance out of the container in which it is stored in order to apply it onto a surface or to fill in the crevasses.

[0003] Conventional hand-held material dispensing devices rely on the action of a piston to push paste-like materials out of a tube's nozzle. The movement of the piston may be induced by employing mechanical means such as a trigger or a spring; Typically, a rod is used to push forward the moveable cap of standard containers, which makes the gun a cumbersome tool.

[0004] It is desired to provide a caulk gun that is simply operated and is more compact.BRIEF SUMMARY

[0005] According to an aspect of the present subject matter, a hydraulic or pneumatic operated paste dispensing device is provided for dispensing material out of a container wherein the container is provided with a nozzle at the front end through which the material is dispensed and a movable cap at the back end of the container wherein the movable cap is configured to move to within the container towards the nozzle while squeezing the material out of the nozzle, the paste dispending device comprising: a reservoir of fluid;a housing having a front opening, wherein the housing is configured to accommodate the container; a resilient fluid receiver contained within the housing and fluidically connected to the reservoir of fluid so as to receive the fluid from the fluid reservoir and extend outwardly from the housing through the front opening, wherein when the back end of the container is accommodated within the housing and the fluid is received within the resilient fluid receiver, the resilient fluid receiver extends to within the container while pushing the cap towards the nozzle and dispense the material out of the nozzle and wherein when the fluid is returned to the reservoir of fluid, the resilient fluid receiver is withdrawn to within the housing.

[0006] In accordance with another embodiment of the present subject matter, the reservoir of fluid is within a hand-held portion of the paste dispensing device and wherein the housing is mounted on the hand-held portion.

[0007] In accordance with another embodiment of the present subject matter, the fluid is selected from a group of fluids such as water, oil, or compressed gas.

[0008] In accordance with another embodiment of the present subject matter, a telescopic tube is associated with the reservoir of fluid so as to assist to shape and direct the resilient fluid receiver to within the container.

[0009] In accordance with another embodiment of the present subject matter, the telescopic tube can be out of or in the resilient fluid receiver.

[0010] In accordance with another embodiment of the present subject matter, the resilient fluid receiver is a resilient bellow or an elastic member such as a balloon.

[0011] In accordance with another embodiment of the present subject matter, when the resilient fluid receiver is empty it has a default state of being retracted.

[0012] In accordance with another embodiment of the present subject matter, a resilient member is associated with the resilient fluid receiver so as to retract it when the receiver is empty or being emptied.

[0013] In accordance with another embodiment of the present subject matter, the resilient member is a spring associated with both sides of the resilient fluid receiver.

[0014] In accordance with another embodiment of the present subject matter, a pump is provided to transfer the fluid from the reservoir of fluid and the resilient fluid receiver.

[0015] In accordance with another embodiment of the present subject matter, the pump is manually or electrically activated.

[0016] In accordance with another embodiment of the present subject matter, the pump is provided on a tube having a check valve so that fluid can be transferred solely from the reservoir of fluid to the resilient fluid receiver.

[0017] In accordance with another embodiment of the present subject matter, the pump is operated through a handle that manually activates the pump.

[0018] In accordance with another embodiment of the present subject matter, the pump is operated through a trigger that is electrically connected to a battery and electrically operates the pump.

[0019] In accordance with another embodiment of the present subject matter, the resilient fluid receiver is being emptied and fluid transferred to the reservoir of fluid through a tube having a valve.

[0020] In accordance with another embodiment of the present subject matter, the valve has a portion that protrudes through the housing or a hand-held portion of the paste dispensing device.

[0021] In accordance with another embodiment of the present subject matter, a covered opening is provided to the reservoir of fluid or to the resilient fluid receiver through which the fluid can be removed or exchanged.

[0022] In accordance with another embodiment of the present subject matter, a spraying head is provided in a front end of the housing and wherein fluid can be sprayed from the spraying head.

[0023] In accordance with another embodiment of the present subject matter, a flashlight is provided in a front end of the housing, the flashlight is configured to light surroundings of the paste dispensing device.

[0024] In accordance with another embodiment of the present subject matter, a friction surface is provided to an inner edge of the housing in the vicinity of the front opening wherein the friction surface is configured to move between a positioning in which the container is firmly held and a positioning in which the container is released.

[0025] In accordance with another embodiment of the present subject matter, the friction surface is selected from a group of friction surfaces consisting of rubber, textured metal, sandpaper, felt, or knurled surface.

[0026] In accordance with another embodiment of the present subject matter, a resilient element is provided adjacent to the friction surface so that the resilient element pushes the friction surface towards the front opening.

[0027] In accordance with another embodiment of the present subject matter, the resilient element is a spring.

[0028] In accordance with another embodiment of the present subject matter, the friction surface is based on a stopper.

[0029] In accordance with another embodiment of the present subject matter, a handle is provided on the housing so as to move the stopper and the friction surface to release the container.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosed subject matter belongs. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present disclosed subject matter, suitable methods and materials are described below. In case of conflict, the specification, including definitions, will control. In addition, the materials, methods, and examples are illustrative only and not intended to be limiting.BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Some embodiments of the disclosed subject matter described, by way of example only, with reference to the accompanying drawings. With specific reference now to the drawings in detail, it is stressed that the particulars shown are by way of example and for purposes of illustrative discussion of the preferred embodiments of the present disclosed subject matter only, and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the disclosed subject matter. In this regard, no attempt is made to show structural details of the disclosed subject matter in more detail than is necessary for a fundamental understanding of the disclosed subject matter, the description taken with the drawings making apparent to those skilled in the art how the several forms of the disclosed subject matter may be embodied in practice.In the drawings:

[0032] Figure 1 illustrates a standard tubular container mounted onto a paste dispensing device in accordance with the prior art;

[0033] Figure 2A illustrates a side cross sectional view of a hydraulic paste dispensing device, in accordance with some exemplary embodiments of the disclosed subject matter;

[0034] Figure 2B illustrates a side cross sectional view of the hydraulic paste dispensing device shown in Figure 2A with a full container;

[0035] Figure 2C illustrates a side cross sectional view of the hydraulic paste dispensing device shown in Figure 2A with a container that was emptied;

[0036] Figure 2D illustrates a side cross sectional view of the hydraulic paste dispensing device, in accordance with some other exemplary embodiments of the disclosed subject matter, with a container that was emptied;

[0037] Figure 3A illustrates a cross sectional side view of an electrical hydraulic paste dispensing device with a full container, in accordance with some exemplary embodiments of the disclosed subject matter;

[0038] Figure 3B illustrates a cross sectional side view of an electrical hydraulic paste dispensing device with a full container, in accordance with some exemplary embodiments of the disclosed subject matter;

[0039] Figure 3C illustrates a cross sectional side view of an electrical hydraulic paste dispensing device with a substantially empty container, in accordance with some exemplary embodiments of the disclosed subject matter;

[0040] Figure 4 illustrates an exploded view of a stopper element to be incorporated within the dispensing device, in accordance with some exemplary embodiments of the disclosed subject matter; and

[0041] Figure 5 illustrates a perspective view of a dispensing device with a release handle, in accordance with some other exemplary embodiments of the disclosed subject matter.DETAILED DESCRIPTION

[0042] Before explaining at least one embodiment of the disclosed subject matter in detail, it is to be understood that the disclosed subject matter is not limited in its application to the details of construction and the arrangement of the components set forth in the following description or illustrated in the drawings. The disclosed subject matter is capable of other embodiments or of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein is for the purpose of description and should not be regarded as limiting. The drawings are generally not to scale. For clarity, non-essential elements were omitted from some of the drawings.

[0043] The terms "comprises", "comprising", "includes", "including", and "having" together with their conjugates mean "including but not limited to". The term "consisting of" has the same meaning as "including and limited to".

[0044] The term "consisting essentially of" means that the composition, method or structure may include additional ingredients, steps and / or parts, but only if the additional ingredients, steps and / or parts do not materially alter the basic and novel characteristics of the claimed composition, method or structure.

[0045] As used herein, the singular form "a", "an" and "the" include plural references unless the context clearly dictates otherwise. For example, the term "a compound" or "at least one compound" may include a plurality of compounds, including mixtures thereof.

[0046] Throughout this application, various embodiments of this disclosed subject matter may be presented in a range format. It should be understood that the description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the disclosed subject matter. Accordingly, the description of a range should be considered to have specifically disclosed all the possible sub-ranges as well as individual numerical values within that range.

[0047] It is appreciated that certain features of the disclosed subject matter, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the disclosed subject matter, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable sub-combination or as suitable in any other described embodiment of the disclosed subject matter. Certain features described in the context of various embodiments are not to be considered essential features of those embodiments, unless the embodiment is inoperative without those elements.

[0048] It is an aspect of the present subject matter to provide a paste dispensing device that is hydraulic or pneumatic operated for dispensing material out of a container wherein the container is provided with a nozzle at the front end through which the material is dispensed and a movable cap at the back end of the container wherein the movable cap is configured to be pushed and move to within the container while squeezing the material out of the nozzle, the paste dispending device comprising: a reservoir of fluid that can be in a hand-held portion; a housing mounted on the hand-held portion, wherein the housing is configured to accommodate the container; a resilient fluid receiver contained within the housing and fluidically connected to the reservoir of fluid so as to receive the fluid from the fluid reservoir and extend outwardly from the housing,wherein when the back end of the container is accommodated within the housing and the fluid is received within the resilient fluid receiver, the resilient fluid receiver extends to within the container while pushing the cap towards the nozzle and dispense the material out of the nozzle and wherein when the fluid is returned to the reservoir of fluid, the resilient fluid receiver is withdrawn to within the housing.

[0049] Optionally, a telescopic tube is accommodated within or outwardly positioned about the resilient fluid receiver so as to guide it's extension and withdrawal movements.

[0050] Optionally, a resilient element is provided to the resilient fluid receiver so as to maintain a withdrawn default position of the resilient fluid receiver.

[0051] Reference is now made to Figure 1 illustrating a standard tubular container mounted onto a paste dispensing device in accordance with the prior art.

[0052] Paste dispensing devices such as glue guns, dispensing guns for sealants or any other devices that are used to withdraw the material from a container are known in the art. The paste dispending device 10 is configured to accommodate a standard container 12 filled with dispensing material. The container 12 typically has a nozzle 14 having an aperture 16 at the front side from which the material 18 from within the container is dispensed, and a rear side 20 having a moveable cap (not seen in the figure) capable of travelling within the container 12. When the container is full, the moveable cap is located at the back end of the container 12, at its rear side 20. Force exerted upon the container’s movable cap through a rod 22 causes the cap to move forward within the container 12, compressing and squeezing the material within the container towards the nozzle 12 and out of the container through the aperture 16. The rod 22 is substantially at the same length of the container 12, wherein when the container is full, the rod is fully outside of the container (the cap is at the rear side 20 of the container 12) and substantially doubles the whole length of the dispensing device 10. The container 12 is emptied of material from the rear side of the container 12 and to the front side, towards the nozzle 14. When the container is fully empty, the rod 22 is within the container 12 while the cap is at the front side of it. A handle 24 is used to move the rod 22 forward to within the container, while pushing the material out of the aperture 16 with the cap.

[0053] The rod that is about the same length of the container makes the tool a cumbersome device. It is an object of the present subject matter to provide a dispensing device having a compact length that is convenient to use also in small spaces, corners, narrow areas etc.

[0054] Reference is now made to Figures 2A-2C illustrating a side view, a cross sectional side view with a full container, and a cross-sectional side view with a container that is emptied, respectively, of a hydraulic paste dispensing device, in accordance with some exemplary embodiments of the disclosed subject matter.

[0055] A hydraulic paste dispensing device 200 comprises a hand-held portion 202 that acts as a reservoir of a liquid such as water 204. A suction tube 206 is disposed within the water 204 in the hand-held portion 202 which is fluidically connected to a water pump 208 provided with a spring 205 operated by handle 213 and provided with a check valve 207 and is further fluidically connected to a resilient fluid receiver 212 configured to receive the water from the reservoir 204 through pump 208. The resilient fluid receiver that can be a flexible bellow 212 in this embodiment, is configured to extend to its full extended length upon insertion of water to within the bellow and withdraw to its minimal length when empty. The flexible bellow 212 is extended due to the force of the water from the reservoir entering the bellow and is retracted due to its own elasticity or optionally due to a resilient element 201 that is attached between two ends of the resilient fluid receiver.

[0056] It should be noted that any fluid can be used to activate the mechanism that is described herein. Liquids such as water or oil can be used as well as compressed gasses.

[0057] It should be noted that although the reservoir is shown to be in the hand-held portion of the device, it can be located in any other positioning such as parallel to the fluid receiver or in any other location.

[0058] A telescopic tube 210 is associated with the resilient bellow 212 so that it can be wrapped about the resilient bellow 212, as shown in the figures, or be accommodated within the resilient bellow. In any of the cases, the telescopic tube 210 is configured to shape the resilient bellow and guide it to be extended or withdrawn in a correct direction.

[0059] Optionally or alternatively, the water is returned from the resilient bellow 212 to the reservoir 204 in the hand held portion 202 through a return tube 209 upon opening a valve 211 provided in the return tube. The valve 211 is preferably positioned on the housing or on the hand held portion, where the return tube passes through.

[0060] Housing 214 has an open side 215 through which the container (not shown in this figure) is inserted and another side that optionally can be covered by a cover 213, where the withdrawn flexible bellow 212 is accommodated. The container is inserted through open side 215 to within the housing 214 while the nozzle of the container is directed outwardly and the cap of the container is inserted directed to the resilient fluid receiver 212.

[0061] For the operation of the hydraulic dispensing device, reference is made specific to Figure 2B. A material container 100, which is a standard container for silicon gun or glue gun, is placed within housing 214 that is provided on top of the hand-held portion 202. The back side of the container 101 is placed adjacent to the resilient bellow 212 and the front end 102 with the nozzle 103 from which material is dispensed, is directed opposite the cover 213.

[0062] When the handle 213 is operated to activate the pump 208 and transfer the water 204 from the hand-held portion 202 through the suction tube 206 and into the flexible bellow 212, the bellow starts to extend towards the back side of the container 101. In the container's back side, a cap 104 is provided. The extended telescopic tube 210 exerts force forward and pushes the cap 104 of the container 100 towards the front side 102 of the container. This movement of the cap 104 to within the container 100 pushes the material from within the container and outwardly through the nozzle 103. The user is controlling the amount of material that is getting out of the container using the operation of the handle. As long as the handle 213 is operated, the material continues to get out of the nozzle 103.

[0063] Figure 2C shows a situation in which the material that was received in the container 100 was fully dispensed and the cap 104 is pully pushed to be adjacent to the front end 102 of the container 100. The resilient bellow 212 is fully extended and reaches the front end 102 of the container as well. The resilient element 201 is also fully extended from one side of the resilient bellow to the other side. The water 204 from the reservoir in the hand-held portion 202 is in theextended resilient bellow 212 while the reservoir is now empty of liquid, or substantially empty. The telescopic tube 210 is also fully extended.

[0064] Upon operating valve 205, water from the resilient bellow 212 is released to flow back through tube 209 to reservoir 204, while the resilient element 201 is pulling the resilient bellow 212 and the telescopic tube 210 backwards and assists the water to return to the reservoir in the hand-held portion 202.

[0065] Reference is now made to figure 2D illustrating a side cross sectional view of the hydraulic paste dispensing device, in accordance with some other exemplary embodiments of the disclosed subject matter, with a container that was emptied.

[0066] Alternatively, the resilient fluid receiver is an elastic member 212A that acts as a balloon. When the water is pumped through pump 208 into the elastic member 212A, that extends towards the front end 102 of the container 100. A telescopic tube 210 guides the elastic member to be extended to the correct direction, towards the nozzle 103 of the container. Optionally, a resilient member can be provided in order to assist the liquid to be transferred from the elastic member back to the reservoir, as explained herein before.

[0067] Returning to Figure 1A, optionally or additionally, the housing 214 can be provided with a spraying head 230 fluidically connected to the water reservoir 204 wherein upon pulling a dedicated trigger 232 water from the reservoir 204 are sprayed through the spray head 230.

[0068] Returning to Figure 2B, optionally or additionally, a covered opening 220 can be provided in the housing, as shown in the figure, or in the hand-held portion, through which the liquid in the dispensing device can be exchanges or removed from maintenance reasons. The covered opening 220 is fluidically connected to the water reservoir or to the flexible fluid receiver.

[0069] Reference is now made to Figures 3 A, 3B, and 3C illustrating cross sectional side views of an electrical hydraulic paste dispensing device, the device with a full container, and the device with substantially empty container, respectively, in accordance with some exemplary embodiments of the disclosed subject matter.

[0070] An electrical hydraulic paste dispensing device 300 comprises a hand-held portion 302 having a reservoir of a liquid such as water 304. A tube 306 is disposed within the water 304 in the hand-held portion 302 wherein the tube is fluidically connected to an electric water pump 308. The water pump 308 is further fluidically connected to a resilient bellow 312 that is configured to receive the water from the reservoir in the hand-held portion 302. The resilient bellow 312 is configured to extend to its full extended length upon insertion of enough amount of water to within the resilient bellow 312. A telescopic tube 310 is extended with the bellow so as to guide it towards the nozzle 103 of the container 100 while pushing the cap 104 of the container due to the force of the water.

[0071] A resilient element 301 is associated with a resilient below 312 and is configured to withdraw the resilient bellow 312 backward to assist the water 304 to return to the reservoir in the hand-held portion 302. Optionally or additionally, the water is returned to the reservoir upon switching a valve 305 positioned preferably on the housing and mounted on a return tube 309.

[0072] Optionally or additionally, the electric liquid pump 308 is operated through a trigger 313 through which the operator can operate the pump and transfer liquid from the reservoir to the telescopic tube. Consequently, the flexible bellow is forced by the force of the liquid to be lengthen. Optionally or additionally, the electrical pump receives power from a battery 316 that is preferably positioned beneath the hand-held portion 302, but can be positioned in any other positioning without limiting the scope of the present subject matter. The battery 316 is electrically connected by wiring 330 to the trigger as well as to the electric pump.

[0073] For the operation of the electrical hydraulic dispensing device, reference is made specifically to Figures 3B and 3C. A material container 100, which is a standard container such as containers for silicon gun or glue gun, is placed within a housing 314 that is provided on top of the hand-held portion 302. On one side of the housing 314, the flexible bellow 312 and the telescopic tube 310 are positioned in a retracted position and directed towards a back of the container 101, the cap 104. The container 100 is placed within the housing 314 in a positioning where the front end 102 of the container 100 with the nozzle 103 from which material is dispensed is opposite the flexible bellow 312.

[0074] When the trigger 213 is pushed to activate the pump 308 and transfer the water 304 from the reservoir in the hand-held portion 302 through the tube 306 and into the flexible bellow 312, the flexible bellow starts to extend towards the back side of the container 101 while pushing the cap 104 forward towards the front side 102 of the container. This movement of the cap 104 to within the container 100 pushes the material from within the container and outwardly through the nozzle 103. The user is controlling the amount of material that is getting out of the container by the trigger 313. As long as the trigger 213 is pushed, the material continues to get out of the nozzle 103.

[0075] Optionally or alternatively, the flexible bellow can be replaced with an elastic element such as a balloon that will be extended towards the cap of the container and will push the material forward through the nozzle. Other types of flexible fluid receivers can be used in order to form an extendable element that extends as a result of receiving water to within.

[0076] Optionally or alternatively, the flexible fluid receiver can be retracted or withdrawn back to its empty state through the elasticity or flexibility of the fluid receiver itself, or through a flexible element such as a spring that is associated with both sides of the fluid receiver so that the default state of the fluid receivier is to be in a retracted state.

[0077] Figure 3C illustrates a situation in which the material that was received in the container 100 was fully dispensed and the cap 104 is fully pushed to be adjacent to the front end 102 of the container 100. The flexible bellow 312 is fully extended and reaches with the cap 104 the front end 102 of the container. The telescopic tube 310 is also fully extended to reach the front end of the container so as to keep the directional shape of the flexible fluid receiver. The water 304 from the reservoir in the hand-held portion 302 is in the extended flexible bellow 312 while the reservoir is now empty of liquid, or substantially empty. At the end point as shown in this figure, the flexible bellow as well as the telescopic tube are fully extended to within the container and the water is in the flexible bellow 312.

[0078] It should be mentioned that the material contained in the container can be partially be dispensed and not necessarily should be fully emptied. Retracting the flexible bellow can be performed in any stage of the work with the container.

[0079] Upon push of switch of a valve 305, the fluid from the flexible bellow 312 can be flown to be returned to the reservoir in the hand-held portion 302 through a return tube 309. The empty container 100 can be disposed and another container can be placed within the housing 314.

[0080] Optionally or additionally, the housing 314 can be provided with a spraying head 332 fluidically connected to the water reservoir 304 as well as the electric water pump 308 or another dedicated pump and tube, wherein upon pulling a dedicated trigger (not shown in this figure) fluid from the reservoir 304 are sprayed through the spray head 332.

[0081] Optionally or additionally, a flashlight 334 is provided on the housing 314, preferably but not necessarily at the bottom area of the housing. The flashlight can be operated using a dedicated button or alternatively, the flashlight can be operated when the trigger 313 is operated to dispense the material from the container. The flashlight 334 is electrically connected to the battery 316 or is self-sufficient. Since the device is used sometimes in areas where it is dark or in areas where light is not reaching well, it is most important that while using the device and dispensing the paste from the nozzle, the area in which the material is dispensed, can be lit by the flashlight all through the work.

[0082] Reference is now made to Figure 4 illustrating an exploded view of a stopper element to be incorporated within the dispensing device, in accordance with some exemplary embodiments of the disclosed subject matter.

[0083] Since the container is longer than the housing and the housing is preferably made of light materials so it will be easy to handle, it is necessary to hold the container in a steady state within the housing while it will be eventually easy to let the container be removed from the housing. Therefore, a mechanism is provided at the inner edges of the housing that holds the container and another mechanism is provided to release the container from the housing.

[0084] The housing 401 of the hydraulic operating dispensing device 400 can be any one of the housings shown hereinbefore, manually operated or electrically operated. The flexible fluid receiver within the housing 401 can be of any type as disclosed hereinbefore and therefore, is not shown in Figure 4. The inner edge of the housing opening 402 is provided with a stopping element 404 that is shown in an exploded view for simplicity reasons. A flexible friction element406 fits on the inner edge of the housing opening 402. The friction element 406 can be made of rubber, textured metal, sandpaper, felt, or knurled surface.

[0085] Optionally or additionally, the friction element 406 fits inside a flexible stopper 408.

[0086] Optionally or additionally, the inner edge of the housing opening 402 slopes in an angle similar to an angle of the friction element 406.

[0087] A resilient element such as a spring 410 is placed behind the flexible stopper 408 towards the inner portion of the housing 401 of the dispensing device 400. The spring 410 is confined within the inner part of the housing 401 so that the flexible friction element 406 can forcibly move a distance inwardly towards the spring in the housing and release the grip of the container (not shown in this figure).

[0088] Reference is now made also to Figure 5 illustrating a perspective view of a dispensing device with a release handle, in accordance with some other exemplary embodiments of the disclosed subject matter.

[0089] A dispensing device 500 is shown to have a housing 501 in which the hydraulic or pneumatic mechanism is accommodated (cannot be seen in the Figure since it is within the housing). The hydraulic or pneumatic mechanism can be any one of the mechanisms that were disclosed hereinbefore, manually or electrically operated. A container 100 is shown to be inserted with its back side within housing 501, with the nozzle 103 of the container extending out of housing 501 while its back side is held firmly in place by the stopping element 404 (shown in Figure 4) that is now positioned within the open edge 502 of housing 501. As indicated hereinbefore, the spring 410 default is to urge the friction element 406 and the flexible stopper 408 forward towards the opening of the housing. It should be noted that the diameter of the elements that comprises the stopping element 404 is sized to correspond the inner diameter of the inner edge of the housing.

[0090] The flexible stopper 408 has at least one pin 412 (shown better in Figure 4) extending out from it and inserted and protruding outwardly from a slot 504 in the front part of the housing 501. The slot 504 allows movement of the flexible stopper 408 back and forth along the slot 504 and against the spring 410 but preventing excessive backward movement of the stopper 408.

[0091] The dispensing device 500 further has a handle 506 connected to the front side of housing 501 by two arms 508. The arms can be connected to the housing by any connector such as screw 510. The arm 508 has a hole 512 positioned in a position that is configured to accommodate pin 412 of the stopper 408. Another hole (not seen in the figures) is on the other side of the housing and is accommodating an opposite pin that extends out of the housing front on an opposite side. Pushing the handle 506 away from the nozzle 103 and towards the back of the housing slightly extends the diameter of the flexible stopper and friction surface so as to allow the container 100 to be released from the grasp of the flexible stopper 408 in the housing 501. It should be noted that the handle 506 can be organized to be also on the other side of the housing (the opposite top side, as an example).

[0092] Optionally or additionally, the flexibility of the stopper 408 and the friction surface 406 can be due to a slit 416 and 414, respectively, that is provided through the width of the rounded elements so that the diameter can be changed. Other optional mechanisms can be used without limiting the scope of the present subject matter.

[0093] Although the invention has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, it is intended to embrace all such alternatives, modifications and variations that fall within the spirit and broad scope of the appended claims. All publications, patents and patent applications mentioned in this specification are herein incorporated in their entirety by reference into the specification, to the same extent as if each individual publication, patent or patent application was specifically and individually indicated to be incorporated herein by reference. In addition, citation or identification of any reference in this application shall not be construed as an admission that such reference is available as prior art to the present invention.

Claims

CLAIMS1. A hydraulic or pneumatic operated paste dispensing device for dispensing material out of a container wherein the container is provided with a nozzle at the front end through which the material is dispensed and a movable cap at the back end of the container wherein the movable cap is configured to move to within the container towards the nozzle while squeezing the material out of the nozzle, the paste dispending device comprising: a reservoir of fluid; a housing having a front opening, wherein the housing is configured to accommodate the container; a resilient fluid receiver contained within the housing and fluidically connected to the reservoir of fluid so as to receive the fluid from the fluid reservoir and extend outwardly from the housing through the front opening, wherein when the back end of the container is accommodated within the housing and the fluid is received within the resilient fluid receiver, the resilient fluid receiver extends to within the container while pushing the cap towards the nozzle and dispense the material out of the nozzle and wherein when the fluid is returned to the reservoir of fluid, the resilient fluid receiver is withdrawn to within the housing.

2. The paste dispensing device as claimed in Claim 1, wherein the reservoir of fluid is within a hand-held portion of the paste dispensing device and wherein the housing is mounted on the hand-held portion.

3. The paste dispensing device as claimed in Claim 1, wherein the fluid is selected from a group of fluids such as water, oil, or compressed gas.

4. The paste dispensing device as claimed in Claim 1, wherein a telescopic tube is associated with the reservoir of fluid so as to assist to shape and direct the resilient fluid receiver to within the container.

5. The paste dispensing device as claimed in Claim 4, wherein the telescopic tube can be out of or in the resilient fluid receiver.

6. The paste dispensing device as claimed in Claim 1, wherein the resilient fluid receiver is a resilient bellow or an elastic member such as a balloon.

7. The paste dispensing device as claimed in Claim 1, wherein when the resilient fluid receiver is empty it has a default state of being retracted.

8. The paste dispensing device as claimed in Claim 1, wherein a resilient member is associated with the resilient fluid receiver so as to retract it when the receiver is empty or being emptied.

9. The paste dispensing device as claimed in Claim 8, wherein the resilient member is a spring associated with both sides of the resilient fluid receiver.

10. The paste dispensing device as claimed in Claim 1, wherein a pump is provided to transfer the fluid from the reservoir of fluid and the resilient fluid receiver.

11. The paste dispensing device as claimed in Claim 10, wherein the pump is manually or electrically activated.

12. The paste dispensing device as claimed in Claim 10, wherein the pump is provided on a tube having a check valve so that fluid can be transferred solely from the reservoir of fluid to the resilient fluid receiver.

13. The paste dispensing device as claimed in Claim 10, wherein the pump is operated through a handle that manually activates the pump.

14. The paste dispensing device as claimed in Claim 10, wherein the pump is operated through a trigger that is electrically connected to a battery and electrically operates the pump.

15. The paste dispensing device as claimed in Claim 1, wherein the resilient fluid receiver is being emptied and fluid transferred to the reservoir of fluid through a tube having a valve.

16. The paste dispensing device as claimed in Claim 15, wherein the valve has a portion that protrudes through the housing or a hand-held portion of the paste dispensing device.

17. The paste dispensing device as claimed in Claim 1, wherein a covered opening is provided to the reservoir of fluid or to the resilient fluid receiver through which the fluid can be removed or exchanged.

18. The paste dispensing device as claimed in Claim 1, wherein a spraying head is provided in a front end of the housing and wherein fluid can be sprayed from the spraying head.

19. The paste dispensing device as claimed in Claim 1, wherein a flashlight is provided in a front end of the housing, the flashlight is configured to light surroundings of the paste dispensing device.

20. The paste dispensing device as claimed in Claim 1 , wherein a friction surface is provided to an inner edge of the housing in the vicinity of the front opening wherein the friction surface is configured to move between a positioning in which the container is firmly held and a positioning in which the container is released.

21. The paste dispensing device as claimed in Claim 20, wherein the friction surface is selected from a group of friction surfaces consisting of rubber, textured metal, sandpaper, felt, or knurled surface.

22. The paste dispensing device as claimed in Claim 20, wherein a resilient element is provided adjacent to the friction surface so that the resilient element pushes the friction surface towards the front opening.

23. The paste dispensing device as claimed in Claim 22, wherein the resilient element is a spring.

24. The paste dispensing device as claimed in Claim 20, wherein the friction surface is based on a stopper.

25. The paste dispensing device as claimed in Claim 24, wherein a handle is provided on the housing so as to move the stopper and the friction surface to release the container.

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