Claims
- 1. A liquified gas operated viscous material dispensing gun comprising:
- (a) a housing sub-assembly having an elongate tubular housing defining a chamber sized to accommodate a tube of viscous material;
- (b) the housing sub-assembly having an open dispensing end and an opposite valved but otherwise closed end portion;
- (c) a material dispensing sub-assembly removably connectable to the dispensing end of the housing sub-assembly at a sub-assembly connection to form a dispensing assembly;
- (d) the material dispensing sub-assembly including a nozzle remote from the sub-assembly connection, and having a material flow passage communicating with the chamber housing near the sub-assembly connection, the flow passage being sized to accommodate a material tube outlet;
- (e) the material dispensing sub-assembly also including a valve controlled passage for selectively providing communication between an inlet portion of the flow passage and the nozzle and a flow control valve movable between open and closed positions for effecting and preventing such selective communication;
- (f) the dispensing assembly including a seal mechanism positioned to effect a seal between the flow passage to chamber communication and a charge receiving portion of the chamber near the valved end portion;
- (g) the valved end portion including valve means for permitting the introduction of liquefied gas into the charge receiving portion for the dispensing of material and for venting the charge receiving portion to atmosphere when the housing sub-assembly is to be disconnected from the material dispensing sub-assembly;
- (h) a lever mechanism operatively connected to the flow control valve for moving the valve from one position toward the other; and
- (g) the part of the housing and sub-assembly which provide removable connectability including means for venting the chamber as the two are disconnected but before a disconnection is completed.
- 2. A liquefied gas actuated caulking mechanism comprising:
- (a) an elongate tubular housing having imperforate side walls in part defining a chamber, an open end and an opposite apertured but otherwise closed end;
- (b) charging and venting valves secured to the housing and closing the apertures to provide gas charging and gas venting communication selectively and one at a time between a charge receiving portion of the chamber and a gas supply and the atmosphere external of the housing;
- (c) a discharge control sub-assembly, the sub-assembly and the housing being secured at an interconnection to form an assembly while permitting facile separation for removal of spent mastic cartridges from and insertion of new mastic cartridges into the chamber;
- (d) the discharge control sub-assembly including a flow passage in communication with the chamber and extending to an outlet;
- (e) a flow control valve intersecting the flow passage and axially movable between passage open and passage closed positions;
- (f) a spring interposed between the flow control valve and other parts of the discharge control sub-assembly and biasing the valve toward its closed position such that the valve is normally closed;
- (g) the assembly including a seal positioned to coact with a cartridge positioned in the chamber to block fluid communication between the charge receiving portion and the flow passage when there is a material containing tube in the chamber;
- (h) a pistol grip type handle and lever structure removably connected to the assembly at a connection and including an operator actuatable trigger and an interconnected linkage, the linkages have surfaces coactable with sub-assembly surfaces to move the flow control valve against the action of the spring to its open position in response to operator actuation of the trigger; and
- (i) the interconnected parts include means to vent the chamber to the ambient as the housing and the sub-assembly are separated.
- 3. The mechanism of claim 2 wherein the means to vent the chamber comprises at least one through hole in the sub-assembly part.
- 4. The mechanism of claim 2 wherein the structure includes portions positioned near the means to vent to protect an operator from direct impingement by vented gases.
- 5. A liquified gas actuated caulking mechanism comprising:
- (a) an elongate tubular housing having inperforate side walls in part defining a chamber, an open end and an opposite apertured but otherwise closed end;
- (b) charging and venting valves secured to the housing and closing the apertures to provide gas charging and gas venting communication selectively and one at a time between a charge receiving portion of the chamber and a gas supply and the atmosphere external of the housing;
- (c) a discharge control sub-assembly, the sub-assembly and the housing being secured at an interconnection to from an assembly while permitting facile separation for removal of spent mastic cartridges from and insertion of new mastic cartridges into the chamber;
- (d) the discharge control sub-assembly including a flow passage in communication with the chamber and extending to an outlet;
- (e) a flow control valve intersecting the flow passage and axially movable between passage open and passage closed positions;
- (f) a spring interposed between the flow control valve and other parts of the discharge control sub-assembly and biasing the valve toward its closed position such that the valve is normally closed;
- (g) the assembly including a seal positioned to coact with a cartridge positioned in the chamber to block fluid communication between the charge receiving portion and the flow passage when there is a material containing the tube in the chamber;
- (h) a pistol grip type handle and lever structure removably connected to the assembly at a connection and including an operator actuatable trigger and an interconnected linkage, the linkages have surfaces coactable with sub-assembly surfaces to move the flow control valve against the action of the spring to its open position in response to operator actuation of the trigger; and
- (i) the interconnection between the dispensing sub-assembly and housing comprising mating helical surfaces and the means to vent the chamber comprises space between the mating helical surfaces resulting during disconnection of the interconnection.
- 6. A fluid operated caulking gun comprising:
- (a) a material dispensing sub-assembly;
- (b) an elongate housing and valve sub-assembly;
- (c) a handle and lever structure;
- (d) the material dispensing sub-assembly comprising:
- (i) a body defining internal intersecting flow and valve passages;
- (ii) the flow passage extending from a rearward end of the body removably connected to the housing sub-assembly to a forward discharge end adapted to receive a removable nozzle;
- (iii) a seal carried by the body near the rearward end and interposed between the sub-assemblies;
- (iv) the body including at least one radially disposed vent located between the seal and the rearward end of the body for venting gases from a housing sub-assembly chamber as such sub-assemblies are disconnected;
- (v) an axially movable spool valve mounted in the valve passage;
- (vi) the valve including a flow permitting portion selectively alignable with the flow passage when the spool is in an open position and flow blocking surfaces for blocking flow through the flow passage when in a closed position;
- (vii) a removable valve retaining element connected to the body, the element being constructed to retain the spool in the valve passage and facilely removable to permit removal of the spool from the body for cleaning; and,
- (viii) a spring operably interposed between the body and the spool biasing the spool toward its closed position;
- (e) the housing and valve sub-assembly comprising:
- (i) a drawn housing comprising:
- (aa) an elongate generally cylindrically contoured imperforate tubular portion defining the perimeter of a viscous material containing tubular cartridge chamber;
- (bb) an apertured end portion closing one end of the tube other than for a pair of valve receiving apertures;
- (cc) the tubular portion having an open end opposite the apertured end portion; and,
- (dd) the tubular portion having an externally threaded section near the open end, the threaded section being the part of the housing sub-assembly connected to the material sub-assembly;
- (ii) a gas charging valve sealingly mounted in one of the closed end apertures and adapted for connection of a liquefied gas container to introduce a charge of liquefied gas into a charge receiving portion of the chamber; and,
- (iii) a charge receiving portion venting valve closing the other valve receiving aperture and including a venting valve actuator projecting outwardly from the apertured end portion whereby to provide a reminder to an operator disconnecting the housing and valve sub-assembly from a dispensing sub-assembly to actuate the venting valve actuator before effecting such disconnection; and,
- (f) the handle and lever structure comprising:
- (i) a stem section adapted to abut and extend along the elongate housing;
- (ii) a grippable handle section depending from the stem section in pistol grip relationship;
- (iii) a yoke section forward of the handle section and projecting upwardly from the stem section when the handle is projecting downwardly;
- (iv) the yoke section including a spaced pair of arms straddling the dispensing sub-assembly and including fastener receiving apertures;
- (v) fasteners extending through the fastener apertures and removably connecting the structure to the material sub-assembly; and,
- (vi) a valve actuating linkage system including:
- (aa) a trigger element pivotally connected to a selected one of the handle and stem sections and movable between a normal position and a dispensing position;
- (bb) a transversely disposed lever shaft connected to a selected one of the stem and yoke sections;
- (cc) a lever arm means connected to the shaft and including a forwardly projecting valve spool engagement portion and a downwardly projecting linkage connected portion; and,
- (dd) a linkage connecting the connected portion and the trigger such that movement of the trigger from its normal to its dispensing position will move other elements of the system including the spool engagement portion between normal and dispensing positions.
- 7. The gun of claim 6 wherein the fastener apertures are forwardly extending open ended slots.
- 8. The gun of claim 6 wherein there is a spaced pair of spool engagement portions.
- 9. The caulking gun of claim 6 wherein the charge receiving portion is defined by air expansible bellows disposed within the housing.
- 10. A dispensing sub-assembly for a fluid operated caulking gun comprising:
- (a) a body defining internal intersecting flow and valve passages;
- (b) the flow passage extending from a rearward end of the body adapted to be removably connected to a cartridge receiving housing to a forward discharge end adapted to receive a removable nozzle;
- (c) a seal carried by the body near the rearward end;
- (d) an axially movable spool valve mounted in the valve passage;
- (e) the body including at least one radially disposed vent located between the seal and the rearward end of the body for venting gases from a housing chamber when such housing is disconnected from the body;
- (f) the valve including a flow permitting portion selectively alignable with the flow passage when the spool is in an open position and flow blocking surfaces for blocking flow through the flow passage when in a closed position;
- (g) a removable valve retaining element threadedly connected to the body, the element being constructed to contain the spool in the valve passage and being facilely removable to permit removal of the spool from the body for cleaning; and,
- (h) a spring operably interposed between the body and the spool biasing the spool toward its closed position.
- 11. The sub-assembly of claim 10 including means for removably connecting a handle and lever structure.
- 12. A handle and lever structure for use with an assembly to form a fluid actuated viscous material dispensing device comprising:
- (a) a stem section adapted to abut and extend along an elongate housing forming part of such assembly;
- (b) a grippable handle section depending from the stem section in pistol grip relationship;
- (c) a yoke section forward of the handle section and projecting upwardly from the stem section when the handle is projecting downwardly;
- (d) the yoke section including a spaced pair of arms for straddling a dispensing sub-assembly and including fastener apertures for removably receiving fasteners for connecting the structure to such material sub-assembly; and,
- (e) a valve actuating linkage system including:
- (i) a trigger element pivotally connected to a selected one of the handle and stem sections and movable between a normal position and a dispensing position;
- (ii) a transversely disposed lever shaft connected to a selected one of the stem and yoke sections;
- (iii) a lever arm means connected to the shaft and including a forwardly projecting valve spool engagement portion and a downwardly projecting linkage connected portion; and,
- (iv) a linkage connecting the connected portion and the trigger such that movement of the trigger from its movable to its dispensing position will move other elements of the system including the spool engagement portion between normal and dispensing positions.
- 13. The structure of claim 12 wherein the fastener apertures are forwardly extending open ended slots.
- 14. The structure of claim 12 wherein there is a spaced pair of spool engagement portions.
- 15. A housing and valve sub-assembly for connection to a dispensing sub-assembly to form a liquefied gas actuating dispensing gun assembly comprising:
- (a) a drawn housing comprising:
- (i) an elongate generally cylindrically contoured imperforate tubular portion defining the perimeter of a viscous material containing tubular cartridge chamber;
- (ii) an apertured end portion closing one end of the tube other than for a pair of valve receiving apertures;
- (iii) the tubular portion having an open end opposite the apertured end portion; and
- (iv) the tubular portion having an externally threaded section near the open end;
- (b) a gas charging valve sealingly mounted in one of the closed end apertures and adapted for connection of a liquefied gas container to introduce a charge of liquefied gas into a charge receiving portion of the chamber;
- (c) a charge receiving portion venting valve closing the other valve receiving aperture and including a venting valve actuator projecting outwardly from the apertured end portion whereby to provide a reminder to an operator disconnecting the housing and valve sub-assembly from a dispensing sub-assembly to actuate the venting valve actuator before effecting such disconnection; and
- (d) the venting valve being constructed such that it may be selectively secured in an open position until returned to a closed position by operator action whereby to permit an operator to maintain the venting valve open as the sub-assembly is disconnected from a dispensing sub-assembly.
- 16. A method of dispensing viscous material from a liquified gas operated dispensing gun comprising the steps of:
- (a) inserting a viscous material cartridge into a housing and valve sub-assembly for sealing engagement between the cartridge and sub-assembly;
- (b) assembling said dispensing gun by removably connecting the housing and valve sub-assembly with a material dispensing sub-assembly to form a dispensing assembly;
- (c) coupling a container of liquified gas to a charging valve in the housing and valve sub-assembly;
- (d) loading gas propellant from the container through the charging valve into the housing and valve sub-assembly;
- (e) disconnecting the container from the charging valve;
- (f) preventing the flow of the propellant through a material flow passage using a seal and an element adapted to bias material for flow;
- (g) actuating a trigger mechanism interconnected with the material dispensing sub-assembly to move a spring biased flow control valve between normal and dispensing positions;
- (h) dispensing viscous material flowing through a nozzle through said flow control valve via a material flow passage in response to trigger actuation;
- (i) reloading said dispensing gun by actuating a venting valve in the housing and valve sub-assembly to relieve the gun of residual propellant;
- (j) disconnecting the sub-assemblies;
- (k) removing a spent material cartridge from the housing and valve sub-assembly;
- (l) inserting another material cartridge into the housing and valve sub-assembly;
- (m) reconnecting the sub-assemblies to form the dispensing assembly;
- (n) recharging the charging valve in the housing and valve sub-assembly with gas propellant from the container;
- (o) disconnecting the container from the charging valve; and
- (p) actuating the trigger mechanism to resume dispensing viscous material from said dispensing gun; and
- (q) allowing residual propellant to vent through a passage opened during disconnection as the sub-assemblies are being disconnected.
- 17. A handle and lever structure for use with an assembly to form a fluid actuated viscous material dispensing device comprising:
- (a) a stem section adapted to abut and extend along an elongate housing forming part of such assembly;
- (b) a grippable handle section depending from the stem section in pistol grip relationship;
- (c) a yoke section forward of the handle section and projecting upwardly from the stem section when the handle is projecting downwardly;
- (d) the yoke section including a spaced pair of arms for straddling a dispensing sub-assembly and including fastener apertures for removably receiving fasteners for connecting the structure to such material sub-assembly; and,
- (e) a valve actuating linkage system including:
- (i) a trigger element pivotally connected to a selected one of the handle and stem sections and movable between a normal position and a dispensing position;
- (ii) a transversely disposed lever shaft connected to a selected one of the stem and yoke sections;
- (iii) a lever arm means connected to the shaft and including a valve spool engagement portion and a linkage connected portion; and,
- (iv) a linkage connecting the connected portion and the trigger such that on movement of the trigger from its normal to its dispensing position other elements of the system including the spool engagement portion will move between normal and dispensing positions.
Parent Case Info
This is a continuation of co-pending application Ser. No. 07/182,017 filed on 4/29/88 now abandoned, which in turn is a Continuation-In-Part of application Ser. No. 07/047,867 filed 5/6/87, now abandoned.
US Referenced Citations (14)
Non-Patent Literature Citations (1)
Entry |
Catalog of Beyer & Auto--DG-1 at Appendix A. |
Continuations (1)
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Number |
Date |
Country |
Parent |
182017 |
Apr 1988 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
47867 |
May 1987 |
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