WO2001054827A1 - Drip free caulking gun - Google Patents

Drip free caulking gun Download PDF

Info

Publication number
WO2001054827A1
WO2001054827A1 PCT/GB2001/000215 GB0100215W WO0154827A1 WO 2001054827 A1 WO2001054827 A1 WO 2001054827A1 GB 0100215 W GB0100215 W GB 0100215W WO 0154827 A1 WO0154827 A1 WO 0154827A1
Authority
WO
WIPO (PCT)
Prior art keywords
trigger
push rod
locking plate
acts
cartridge
Prior art date
Application number
PCT/GB2001/000215
Other languages
French (fr)
Inventor
Adrian Paul Grieves
Original Assignee
Adrian Paul Grieves
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB0001506A external-priority patent/GB0001506D0/en
Priority claimed from GB0030426A external-priority patent/GB0030426D0/en
Application filed by Adrian Paul Grieves filed Critical Adrian Paul Grieves
Priority to AU26942/01A priority Critical patent/AU2694201A/en
Publication of WO2001054827A1 publication Critical patent/WO2001054827A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
    • B05C17/014—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like comprising means for preventing oozing

Definitions

  • This invention relates to a caulking gun and particularly to a caulking gun which may be used in a drip-free manner.
  • Caulking guns are well known tools used to extrude caulks, sealants, adhesives and other fluid material from a tubular cartridge, through a nozzle at one end of the cartridge, in order to apply the material to a surface.
  • a caulking gun is operated via a trigger which acts as a lever and works on a push rod in such a way that it causes the push rod to move forward against the longitudinally moveable base of the tubular cartridge. This action causes pressurisation of the material within the cartridge, causing it to flow through the nozzle at the opposite end of the cartridge .
  • Stopping the flow of material m this way is not easily controllable or instantaneous and can result in an untidy application of the material to the desired surface.
  • An object of this invention is to provide a caulking gun which combines a smooth continuous flow of material during repeated operations of the trigger with the facility to instantaneously and controllably stop the flow when required.
  • a caulking gun which comprises a body, a push rod passing through the body, a sp ⁇ ng- operated locking plate which acts on the push rod normally to allow travel in only a forward direction, and a trigger which, when operated, acts on the push rod to move it forward, the trigger and locking plate being arranged such that, at a point during the return movement of the trigger, a cam which forms a part of the trigger or which acts m response to movement of the trigger acts on the locking plate to release its lock on the push rod.
  • the trigger is able to move to a point, further m its return movement, where it disengages from the locking plate again, so that the locking plate acts to hold the push rod against future return movement.
  • the trigger may undergo a return movement to the point at which its cam acts on the locking plate to disengage the locking plate from the push rod.
  • the pressure within the cartridge acts on the push rod to force it rearwardly, so releasing the pressure within the cartridge and stopping the flow of material from the cartridge nozzle.
  • FIGURE 1 is a perspective view of a caulking gun in accordance with the invention
  • FIGURE 2 is a similar view of the caulking gun, showing the trigger disassembled from the gun;
  • FIGURE 3 is a view of the handle-end of the caulking gun, shown once the trigger has been fully depressed;
  • FIGURE 4 is a similar view to Figure 3, showing the trigger released to a point from where it may be depressed again without the plunger rod having been allowed to move backwards;
  • FIGURE 5 is a similar view to Figure 4, showing the trigger released to a point where it disengages the locking plate to allow the push rod to move backwards;
  • FIGURE 6 is a similar view to Figure 5, showing the trigger released to its full extent to allow the locking plate to act on the push rod to hold the cartridge secure.
  • a caulking gun which comprises a body 10 in which a push rod 11 is mounted, and a trigger 12 which is operable for moving the push rod 11 forwards .
  • the body 10 comprises an open frame structure having a handle 10a projecting downwardly from a rear end portion of the body, and two legs 10b extending longitudinally forwards from the rear end portion, to support a ring 10c at the font end of the gun.
  • the push rod 11 passes through successive mounting sections lOd, lOe, lOf of the rear end portion of the body 10 and has a disc-shaped head 11a fixed to its forward end.
  • the push rod 11 carries a drive plate 13 which is urged rearwardly by a coil spring 14 disposed around the push rod 11 and acting between the mounting section lOf and the drive plate 13.
  • the push rod 11 also carries a locking plate 15 which is urged rearwardly, against the mounting section lOd, by a coil spring 16 which is disposed around the push rod and acts between the mounting section lOe and the locking plate 15.
  • the trigger 12 is pivotally mounted to the handle 10a by means of a co-operating pair of pivot pins 12a inserted through the trigger 12, at a point inset from its upper end, and through the handle 10a, at a point adjacent the junction of the handle with the rear end portion of the body 10.
  • a bias spring 12b is disposed around the pivot pin and acts between the trigger 12 and the handle 10a.
  • the cartridge is placed in the space between the legs 10b of the body 10 (once the push rod has been retracted) , with the nozzle of the cartridge projecting through the ring 10c at the forward end of the gun and the forward end of the cartridge located in the recessed rear side of the ring 10c.
  • the push rod 11 is then advanced for its head 11a to enter the rear end of the cartridge and abut the longitudinally-moveable base of the cartridge.
  • the user holds the handle 10a with one hand and, with the forefinger of that hand, depresses the trigger 12 against the bias of its spring 12b: the trigger 12 may be depressed fully, to the position shown in Figure 3.
  • the front, upper end of the trigger 12 bears on the lower end of the drive plate 13, so tilting the drive plate 13 as shown so that it frictionally engages the push rod 11: the pivoting movement of the trigger 12 accordingly causes the drive plate 13 to move the push rod 11 forwardly, so pressurising the material in the cartridge and causing a quantity of this material to be extruded from the nozzle.
  • the trigger 12 is then allowed to return to a position no further than that show in Figure 4, before being depressed again to extrude further material from the nozzle of the cartridge.
  • the locking plate 15 acts on the push rod 11 at all times to allow its forward movement only, thereby maintaining flow pressure throughout repeated operations of the trigger.
  • the pressure within the cartridge providing a rearward force on the push rod, is resisted by frictional engagement between the push rod and the locking plate 15, as a result of the locking plate being tilted, over a fulcrum 15b, by its spring 15a.
  • the trigger 12 is allowed to travel back, under the influence of its return spring, to its full extent.
  • the trigger momentarily passes through a position shown in Figure 5.
  • a cam 12c formed by the rear upper end of the trigger 12 or acting in response to movement of the trigger, acts on the locking plate 15 in such a way that it progressively straightens it and so releases the locking plate 15 from acting on the push rod 11.
  • This action allows the push rod to travel backwards under the pressure in the cartridge, thus releasing pressure from within the cartridge and instantaneously stopping flow from its nozzle.
  • the action of the cam part of the trigger allows the locking plate 15 once again to be tilted and so act on the push rod as shown in Figure 6, in order that the cartridge is held securely in position.
  • the push rod 11 may be grasped at its rear end and then withdrawn or moved forward to enable the cartridge to be loaded or unloaded as required.
  • the caulking gun which has been described can be operated to extrude a quantity of material from the cartridge, then the trigger allowed to return to an intermediate position ( Figure 5) to allow release of the pressure within the cartridge: the flow of material is thus stopped, such that the cartridge is drip-fee. Then the trigger is allowed to return to its rest position ( Figure 6), in which the push rod is locked in position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)

Abstract

A caulking gun having a cam (12c) formed on its trigger (12) or acting in response to movement of the trigger, to act on the locking plate (15) at an intermediate point during the return movement of the trigger, to release the locking engagement of the locking plate (15) on the push rod (11). In this position of the trigger, therefore, the pressure of caulking material within the cartridge acts to displace the push rod (11) rearwardly, so relieving this pressure and stopping the unwanted flow of material from the cartridge nozzle.

Description

Drip Free Caulking Gun
This invention relates to a caulking gun and particularly to a caulking gun which may be used in a drip-free manner.
Caulking guns are well known tools used to extrude caulks, sealants, adhesives and other fluid material from a tubular cartridge, through a nozzle at one end of the cartridge, in order to apply the material to a surface.
Typically such a caulking gun is operated via a trigger which acts as a lever and works on a push rod in such a way that it causes the push rod to move forward against the longitudinally moveable base of the tubular cartridge. This action causes pressurisation of the material within the cartridge, causing it to flow through the nozzle at the opposite end of the cartridge .
As the trigger is released from acting on the push rod, the push rod is prevented from withdrawing. This is due to the action of a spring operated locking plate which acts on the push rod to allow the rod to travel in a forward direction only. This results in a certain amount of pressure being maintained within the cartridge, and therefore flow of material from the nozzle, between successive operations of the trigger, and allows for a reasonably smooth, continuous flow of material .
In order to stop the flow of material, other than by simply allowing the pressure and flow of material to reduce gradually, it is necessary to release the trigger and press on the above-mentioned locking plate, against the action of its spring, to stop the locking action of the locking plate on the push rod. This allows the push rod to travel backwards releasing pressure from within the cartridge, and thereby stopping the flow of material.
Stopping the flow of material m this way is not easily controllable or instantaneous and can result in an untidy application of the material to the desired surface.
An object of this invention is to provide a caulking gun which combines a smooth continuous flow of material during repeated operations of the trigger with the facility to instantaneously and controllably stop the flow when required.
According to the present invention there is provided a caulking gun which comprises a body, a push rod passing through the body, a spπng- operated locking plate which acts on the push rod normally to allow travel in only a forward direction, and a trigger which, when operated, acts on the push rod to move it forward, the trigger and locking plate being arranged such that, at a point during the return movement of the trigger, a cam which forms a part of the trigger or which acts m response to movement of the trigger acts on the locking plate to release its lock on the push rod. Preferably the trigger is able to move to a point, further m its return movement, where it disengages from the locking plate again, so that the locking plate acts to hold the push rod against future return movement. Thus, after operating the trigger one or more times to pressurise the material within the cartridge and so cause a flow of the material from the nozzle of the cartridge, the trigger may undergo a return movement to the point at which its cam acts on the locking plate to disengage the locking plate from the push rod. The pressure within the cartridge acts on the push rod to force it rearwardly, so releasing the pressure within the cartridge and stopping the flow of material from the cartridge nozzle.
An embodiment of the invention will now be described by way of example only and with reference to the accompanying drawings, in which :- FIGURE 1 is a perspective view of a caulking gun in accordance with the invention;
FIGURE 2 is a similar view of the caulking gun, showing the trigger disassembled from the gun; FIGURE 3 is a view of the handle-end of the caulking gun, shown once the trigger has been fully depressed;
FIGURE 4 is a similar view to Figure 3, showing the trigger released to a point from where it may be depressed again without the plunger rod having been allowed to move backwards;
FIGURE 5 is a similar view to Figure 4, showing the trigger released to a point where it disengages the locking plate to allow the push rod to move backwards; and
FIGURE 6 is a similar view to Figure 5, showing the trigger released to its full extent to allow the locking plate to act on the push rod to hold the cartridge secure. Referring to Figures 1 and 2 of the drawings, there is shown a caulking gun which comprises a body 10 in which a push rod 11 is mounted, and a trigger 12 which is operable for moving the push rod 11 forwards . The body 10 comprises an open frame structure having a handle 10a projecting downwardly from a rear end portion of the body, and two legs 10b extending longitudinally forwards from the rear end portion, to support a ring 10c at the font end of the gun. The push rod 11 passes through successive mounting sections lOd, lOe, lOf of the rear end portion of the body 10 and has a disc-shaped head 11a fixed to its forward end. The push rod 11 carries a drive plate 13 which is urged rearwardly by a coil spring 14 disposed around the push rod 11 and acting between the mounting section lOf and the drive plate 13. The push rod 11 also carries a locking plate 15 which is urged rearwardly, against the mounting section lOd, by a coil spring 16 which is disposed around the push rod and acts between the mounting section lOe and the locking plate 15. The trigger 12 is pivotally mounted to the handle 10a by means of a co-operating pair of pivot pins 12a inserted through the trigger 12, at a point inset from its upper end, and through the handle 10a, at a point adjacent the junction of the handle with the rear end portion of the body 10. A bias spring 12b is disposed around the pivot pin and acts between the trigger 12 and the handle 10a.
In conventional manner, the cartridge is placed in the space between the legs 10b of the body 10 (once the push rod has been retracted) , with the nozzle of the cartridge projecting through the ring 10c at the forward end of the gun and the forward end of the cartridge located in the recessed rear side of the ring 10c. The push rod 11 is then advanced for its head 11a to enter the rear end of the cartridge and abut the longitudinally-moveable base of the cartridge.
Then in order to operate the gun, the user holds the handle 10a with one hand and, with the forefinger of that hand, depresses the trigger 12 against the bias of its spring 12b: the trigger 12 may be depressed fully, to the position shown in Figure 3. In so doing, the front, upper end of the trigger 12 bears on the lower end of the drive plate 13, so tilting the drive plate 13 as shown so that it frictionally engages the push rod 11: the pivoting movement of the trigger 12 accordingly causes the drive plate 13 to move the push rod 11 forwardly, so pressurising the material in the cartridge and causing a quantity of this material to be extruded from the nozzle. The trigger 12 is then allowed to return to a position no further than that show in Figure 4, before being depressed again to extrude further material from the nozzle of the cartridge.
During movement of the trigger 12 between the position shown in Figure 3 and the position shown in Figure 4, the locking plate 15 acts on the push rod 11 at all times to allow its forward movement only, thereby maintaining flow pressure throughout repeated operations of the trigger. In particular, the pressure within the cartridge, providing a rearward force on the push rod, is resisted by frictional engagement between the push rod and the locking plate 15, as a result of the locking plate being tilted, over a fulcrum 15b, by its spring 15a.
To instantly stop the flow of material from the nozzle, the trigger 12 is allowed to travel back, under the influence of its return spring, to its full extent. During the course of this extra movement, the trigger momentarily passes through a position shown in Figure 5. At this position, a cam 12c formed by the rear upper end of the trigger 12 or acting in response to movement of the trigger, acts on the locking plate 15 in such a way that it progressively straightens it and so releases the locking plate 15 from acting on the push rod 11. This action allows the push rod to travel backwards under the pressure in the cartridge, thus releasing pressure from within the cartridge and instantaneously stopping flow from its nozzle. As the trigger 12 then continues past the position shown in Figure 5, the action of the cam part of the trigger allows the locking plate 15 once again to be tilted and so act on the push rod as shown in Figure 6, in order that the cartridge is held securely in position.
With the trigger 12 held in the position shown in Figure 5, the push rod 11 may be grasped at its rear end and then withdrawn or moved forward to enable the cartridge to be loaded or unloaded as required.
It will be appreciated that the caulking gun which has been described can be operated to extrude a quantity of material from the cartridge, then the trigger allowed to return to an intermediate position (Figure 5) to allow release of the pressure within the cartridge: the flow of material is thus stopped, such that the cartridge is drip-fee. Then the trigger is allowed to return to its rest position (Figure 6), in which the push rod is locked in position.

Claims

1) A caulking gun which comprises a body, a push rod passing though the body, a spring-operated locking plate which acts on the push rod normally to ravel in only a forward direction, and a trigger which, when operated, acts on the push rod to move it forward, the trigger and locking plate being arranged such that, at a point during the return movement of the trigger, a cam which forms a pat of the trigger or which acts in response to movement of the trigger acts on the locking plate to release its lock on the push rod.
2) A caulking gun as claimed in Claim 1, in which said trigger is able to move to a point, further in its return movement, where it disengages from the locking plate again, so that the locking plate acts to hold the push rod against further return movement.
3) A caulking gun as claimed in claim 1 wherein a spring is provided which acts on the trigger in such a way so as to oppose the movement of the trigger being pulled throughout the full movement of the trigger.
4) A caulking gun substantially as herein described with reference to the accompanying drawings.
PCT/GB2001/000215 2000-01-25 2001-01-22 Drip free caulking gun WO2001054827A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU26942/01A AU2694201A (en) 2000-01-25 2001-01-22 Drip free caulking gun

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB0001506A GB0001506D0 (en) 2000-01-25 2000-01-25 Selectively drip free caulking gun
GB0001506.5 2000-01-25
GB0004160.8 2000-02-23
GB0004160A GB0004160D0 (en) 2000-01-25 2000-02-23 Selectively drip free caulking gun
GB0030426.1 2000-12-13
GB0030426A GB0030426D0 (en) 2000-02-23 2000-12-13 Caulking gun

Publications (1)

Publication Number Publication Date
WO2001054827A1 true WO2001054827A1 (en) 2001-08-02

Family

ID=27255492

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/000215 WO2001054827A1 (en) 2000-01-25 2001-01-22 Drip free caulking gun

Country Status (3)

Country Link
AU (1) AU2694201A (en)
GB (1) GB2358676A (en)
WO (1) WO2001054827A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1642686A2 (en) * 2004-09-29 2006-04-05 Thomas Völkl Drill support
KR101259405B1 (en) * 2011-05-24 2013-05-07 이병남 Silicone Gun

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2406388A (en) * 2003-09-24 2005-03-30 Pearson Panke Ltd Apparatus to assist in the manual application of force to test stability of graveyard monuments and other upstanding structures
US20070119865A1 (en) 2004-02-05 2007-05-31 Belanger Richard A Cartridge dispenser for liquid or semi-liquid materials

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4141826A1 (en) * 1991-12-18 1993-06-24 Friedhelm Schneider Highly viscous material discharge mechanism from cartridges and containers - draws closure lid up through outlet opening by piston rod after threading onto cartridge etc.
US5653363A (en) * 1994-03-04 1997-08-05 Chang; Peter J. Y. Plunger shaft retainer and trigger release mechanisms for user-selective dripless drive caulk dispensing devices

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4356938A (en) * 1980-10-10 1982-11-02 Kayser Steven J Caulking gun with pressure release mechanism
GB8506010D0 (en) * 1985-03-08 1985-04-11 Ici Plc Extrusion apparatus
US5192008A (en) * 1992-01-23 1993-03-09 Dai Shyun Enterprise Co., Ltd. Pulling mechanism of an adhesive-dispensing gun
US5501374A (en) * 1994-06-17 1996-03-26 Vital Products, Co. Device for extruding high viscosity fluid having multiple modes of operation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4141826A1 (en) * 1991-12-18 1993-06-24 Friedhelm Schneider Highly viscous material discharge mechanism from cartridges and containers - draws closure lid up through outlet opening by piston rod after threading onto cartridge etc.
US5653363A (en) * 1994-03-04 1997-08-05 Chang; Peter J. Y. Plunger shaft retainer and trigger release mechanisms for user-selective dripless drive caulk dispensing devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1642686A2 (en) * 2004-09-29 2006-04-05 Thomas Völkl Drill support
EP1642686A3 (en) * 2004-09-29 2006-04-19 Thomas Völkl Drill support
KR101259405B1 (en) * 2011-05-24 2013-05-07 이병남 Silicone Gun

Also Published As

Publication number Publication date
GB2358676A (en) 2001-08-01
AU2694201A (en) 2001-08-07
GB0101063D0 (en) 2001-02-28

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