WO2001064353A1 - Cartridge dispensing guns - Google Patents
Cartridge dispensing guns Download PDFInfo
- Publication number
- WO2001064353A1 WO2001064353A1 PCT/AU2001/000149 AU0100149W WO0164353A1 WO 2001064353 A1 WO2001064353 A1 WO 2001064353A1 AU 0100149 W AU0100149 W AU 0100149W WO 0164353 A1 WO0164353 A1 WO 0164353A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rod
- plate
- gripper
- pusher
- tilted
- Prior art date
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
- B05C17/0116—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 characterised by the piston driving means
- B05C17/012—Stepwise advancing mechanism, e.g. pawl and ratchets
- B05C17/0123—Lever actuated
Definitions
- the present invention relates to cartridge dispensing guns for cartridges containing viscous material.
- Disposable cartridges containing various viscous products such as adhesives and sealants are used in many industries.
- the contents are expelled from the cartridge by means of a gun in which the cartridge is mounted and which acts against a piston mounted within the body of the cartridge to expel the contents through a dispensing aperture at a forward end of the cartridge.
- a dispensing gun for this purpose typically comprises a support to retain the cartridge and a piston pusher mechanism comprising a trigger operative to advance a piston pusher which extends into the cartridge to bear against the piston.
- the piston pusher is mounted at the forward end of a pusher rod which is incrementally advanced by repeated actuation of a trigger.
- the mechanism conventionally comprises a gripper member operative to grip the pusher rod to advance the rod upon actuation of the trigger, with the gripper member then releasing from gripping engagement while being retracted along the rod upon release of the trigger.
- the gripper member comprises a plate formed with a circular hole through which the pusher rod passes.
- the gripper member grips the rod along a part of the edge of the hole and thereby advances the pusher rod.
- the arc length over which gripping takes place is relatively small and the high contact pressure which arises over this arc length scores the rod and raises serration-like projections from the surface of the rod, and after a number of uses the gripper member can become caught or locked by these serrations with the result that it will not properly return along the rod when the trigger is released.
- the gripper member includes a cylindrical aperture through which the pusher rod passes, the edge of the aperture being shaped to define an elliptical arc which grips the pusher rod over an increased arc length when the gripper member is tilted.
- the elliptical edge results in reduced contact pressure between the gripping edge and the rod, nevertheless scoring of the rod still takes place forming serrations on the rod and these serrations extend over an arc length corresponding to the increased arc of gripping and may still cause interference to the return movement of the gripper member over a period of time.
- the elliptical gripping edge is formed by an arcuate indentation in the face of the gripper member and which intersects the edge of the cylindrical aperture, the gripper member with the cylindrical aperture and arcuate indentation being formed either by a sintering process or casting process. Both processes are relatively complicated and expensive.
- a cartridge dispensing gun comprising a pusher mechanism for incrementally displacing a dispensing piston of the cartridge, said pusher mechanism comprising a pusher rod incrementally advanced by actuation of a trigger to tilt and displace a gripper associated with the rod, said gripper comprising a plurality of gripper plates mounted in parallel, each gripper plate having a passage through which the rod passes, the rod being at least partially of substantially circular cross-section, and the passage in the gripper plate being bounded at one side of the gripper plate by an arc of part-circular shape to define a part-circular edge which grips the rod when the gripper plate is tilted upon actuation of the trigger and also by a surface which is inclined to the axis of the passage and which contacts the surface of the rod when the gripper plate is tilted.
- the contact between the said surface of the plate and the surface of the rod reduces the localised contact pressure between the gripping edge and the rod leading to reduced scoring of the rod, while the use of a plurality of gripper plates acting in parallel ensures even distribution of transmission force to the pusher rod.
- said surface is a part-cylindrical surface which corresponds to the surface of the rod whereby the adjacent part of the rod is cradled by the said surface when the plate is tilted or alternatively said surface is defined by a series of mutually inclined flats which similarly cradle the rod when the plate is inclined.
- the plate comprises two such part-circular edges spaced by said surface.
- a gripper plate for use in a pusher mechanism of a cartridge dispensing gun to incrementally advance a pusher rod of the mechanism upon tilting of the plate and displacement of the plate in the longitudinal direction of the rod, said plate comprising a passage for receiving the rod, a gripping edge adjacent the passage and operative to grip the rod when the plate is tilted, and a surface adjacent the passage to contact an adjacent surface of the rod when the plate is tilted whereby to restrict the depth to which the gripping edge can penetrate into the surface of the rod.
- Figure 1 is a schematic side elevation of a cartridge dispensing gun in accordance with a preferred embodiment of the invention
- Figure 2 is a front elevation of a gripper plate of a gripper of the gun
- FIG. 3 is a section taken on line A- A of Figure 2;
- Figure 4 is an enlarged view showing a detail B of Figure 3;
- Figure 5 is a perspective view of the plate
- Figure 6 is an enlarged schematic view showing the plates of the gripper prior to actuation of a trigger lever of the gun.
- Figure 7 is a view similar to Figure 6 but showing the gripper plates in gripping relationship with a pusher rod of the gun after actuation of the trigger lever.
- a cartridge dispensing gun in accordance with the preferred embodiment of the invention comprises a cradle 2 in which the cartridge is mounted and a pusher mechanism for incrementally displacing a dispensing piston of the cartridge.
- the pusher mechanism comprises a pusher rod 4 of circular cross-section incrementally advanced by actuation of a trigger lever 6 operable to tilt and displace a gripper 8 associated with the rod 4, this action occurring in opposition to the bias of a compression spring 10 acting on the gripper 8 in a sense to return the gripper 8 to a non- gripping position in which it is in a plane substantially at right angles to the axis of the rod 4.
- the trigger lever 6 is pivotally mounted on the handle structure 12 of the gun which also mounts a release latch 14 which frictionally engages the rod 4 in order to prevent rearwards movement of the rod during operation of the gun, the latch 14 being releasable against the bias of a compression spring 16 to facilitate manual retraction of the pusher rod 4 and permit removal of the cartridge from the cradle 2.
- the general construction and operation described thus far is substantially conventional.
- the gripper comprises a number of gripper plates 16 mounted in parallel on the rod 4. As shown there are two gripper plates 16 although it is to be understood that there may be more than two gripper plates.
- the detailed construction of each of the gripper plates 16 is shown in Figures 2 to 5.
- Each gripper plate 16 is formed with a cylindrical aperture 18 defining a passage through which the rod 4 can pass in a slipping relationship when the plate 16 is in a plane at right angles to the axis of the rod 4.
- a stem part 20 of the gripper plate 16 beneath the aperture 18 is adapted to couple the gripper plate to the trigger lever 6 as will be described subsequently.
- the plate 16 grips the pusher rod 4 by engagement of the lower part of the circular end edge of the aperture 18 at the forward side of the plate 16.
- This part-circular gripping edge is interrupted by an inwardly-inclined relief or chamfer 22 preferably positioned mid-way between the opposite ends of the parts of the arc along which the rod 4 is gripped whereby gripping takes place along two short, part-circular arcs 24 separated by the relief 22.
- the arcs 24 may be about 25-45° (corresponding to an arc length of 1.5-3.0 mm for a nominal diameter of the pusher rod of 8.0 mm).
- the relief 22 provides a surface of part-cylindrical form of a corresponding diameter to that of the rod 4 and which contacts the surface of the rod 4 when the gripper plate 16 is tilted.
- the axis of this part-cylindrical surface 22 is inclined to the axis of the aperture 18 and. as shown, the inclination is substantially 30° although it is to be understood that in practice the actual angle will depend on the detailed geometry of the mechanism.
- the gripper plate 16 when the gripper plate 16 is tilted it engages the pusher rod 4 by means of the relatively short part-circular edge portions 24 at either side of the part-cylindrical relief surface 22 and also by means of the part-cylindrical relief surface itself.
- the part-cylindrical relief surface 22 thus provides a contact area which limits the contact pressure applied by the two part-circular edge portions 24 and also restricts the extent to which these edge portions can penetrate into the rod 4 to produce scoring and hence the formation of serrations on the surface of the rod.
- the rear edge of the aperture 18 is formed with a similar relief 22a diametrically opposed to that on the forward face in order to accommodate the tilting movement of the plate.
- Figure 6 shows the configuration of the two plates 16 prior to actuation of the trigger lever 6. As shown in this
- the two plates 16 lie side-by-side with the rear end of the compression spring 10 engaging the forward face of the forward plate and biasing the two plates rearwardly so that an upper part of the rear plate engages an abutment 12a on the handle structure 12.
- An actuating cam 30 of roller-like form on the trigger lever 6 lies adjacent the rear face of the stem 20 of the rear plate 16. In this condition the planes of both plates 16 lie normal to the axis of the pusher rod 4 and hence neither plate is in gripping engagement with the rod.
- Figure 7 shows the condition after actuation of the trigger lever 6 in which the actuating cam 30 of the trigger lever 6 has moved forwardly to displace the stem 20 of the rear plate 16 forwardly and hence also the stem of the forward plate forwardly due to the direct engagement of the rearward plate with the forward plate, whereby the two plates incline as a result of the engagement of the upper end of the rear plate with the abutment 12a of the handle structure 12.
- the manner in which both plates 16 separately grip the rod 4 during this action will be apparent from Figure 7.
- the spring 10 in addition to providing the bias required for operation of the gripper 8, maintains in contact the two or more plates 16 forming the gripper and ensures that they move in unison.
- a lubricant may be applied between the contacting faces of the two plates 16. This may readily be achieved by applying a permanent lubricating coating of, for example, PTFE as sold under the trade mark TEFLON. To increase the distribution of the gripping force provided between the gripper 8 and the rod 4, all that is necessary is to mount one or more further plates 16 on the rod 4 between the compression spring 10 and the abutment 12a on the handle structure 12.
- the relief 22 provides a surface of part-cylindrical form in which the adjacent part of the pusher rod is cradled when the gripper plate is tilted.
- the relief is provided by a series of mutually-inclined flat zones which similarly define a cradle for the adjacent part of the rod when the plate is tilted.
- the edge of the aperture at the rear face can be chamfered around its entire periphery to achieve the same effect.
- the plates 16 can be formed inexpensively by a relatively simple stamping operation using carbon steel followed by an appropriate heat treatment.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Coating Apparatus (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Reverberation, Karaoke And Other Acoustics (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
- Valve Device For Special Equipments (AREA)
- Vending Machines For Individual Products (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Toys (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001233490A AU2001233490B2 (en) | 2000-03-01 | 2001-02-15 | Cartridge dispensing guns |
AT01905491T ATE286784T1 (en) | 2000-03-01 | 2001-02-15 | CARTRIDGE DISPENSING GUN |
AU3349001A AU3349001A (en) | 2000-03-01 | 2001-02-15 | Cartridge dispensing guns |
DK01905491T DK1268084T3 (en) | 2000-03-01 | 2001-02-15 | Cartridge delivery gun |
NZ520987A NZ520987A (en) | 2000-03-01 | 2001-02-15 | Gripper plate construction for cartridge dispensing guns, with plates having circular holes with angled portions to limit penetration into and reduce scoring marks on rod |
CA002400717A CA2400717C (en) | 2000-03-01 | 2001-02-15 | Cartridge dispensing guns |
DE60108362T DE60108362T2 (en) | 2000-03-01 | 2001-02-15 | DISPENSING PISTOL FOR CARTRIDGES |
EP01905491A EP1268084B1 (en) | 2000-03-01 | 2001-02-15 | Cartridge dispensing guns |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPQ5981A AUPQ598100A0 (en) | 2000-03-01 | 2000-03-01 | Cartridge dispensing guns |
AUPQ5981 | 2000-03-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001064353A1 true WO2001064353A1 (en) | 2001-09-07 |
Family
ID=3820085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2001/000149 WO2001064353A1 (en) | 2000-03-01 | 2001-02-15 | Cartridge dispensing guns |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP1268084B1 (en) |
AT (1) | ATE286784T1 (en) |
AU (1) | AUPQ598100A0 (en) |
CA (1) | CA2400717C (en) |
DE (1) | DE60108362T2 (en) |
DK (1) | DK1268084T3 (en) |
ES (1) | ES2234808T3 (en) |
NZ (1) | NZ520987A (en) |
PT (1) | PT1268084E (en) |
TW (1) | TW486389B (en) |
WO (1) | WO2001064353A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7971758B2 (en) | 2005-11-10 | 2011-07-05 | Black & Decker Inc. | Caulk gun |
DE102012216965A1 (en) * | 2012-09-21 | 2014-04-17 | Hilti Aktiengesellschaft | Feed mechanism for extrusion device for extruding cartridge, has clamping element with hole, through which push rod runs with its circular cross-section, where hole has shape of cylinder with elliptical, non-circular base and top surfaces |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4081112A (en) * | 1976-10-12 | 1978-03-28 | Chang Peter J Y | Caulking gun |
EP0486455A2 (en) * | 1990-11-16 | 1992-05-20 | Peter J.Y. Chang | Variable thrust caulk dispensing device |
US5884818A (en) * | 1997-02-24 | 1999-03-23 | Campbell; Norman | Grease gun |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2530359A (en) * | 1948-03-20 | 1950-11-14 | Northeast Tool And Die Works I | Operating mechanism for plungers of caulking guns |
CA1023316A (en) * | 1974-07-17 | 1977-12-27 | Charles R. Costa | Extrusion device |
AU541325B2 (en) * | 1979-04-10 | 1985-01-03 | Wellcome Foundation Limited, The | Dose dispensing of pastes |
GB2194989B (en) * | 1986-09-15 | 1990-08-08 | P C Cox | Rod advancing mechanisms |
DE4231419A1 (en) * | 1992-09-19 | 1994-03-24 | Hilti Ag | Material-extruding tool from cartridge - has bore for piston rod through clamping lever and radiused at both ends |
-
2000
- 2000-03-01 AU AUPQ5981A patent/AUPQ598100A0/en not_active Abandoned
-
2001
- 2001-02-15 EP EP01905491A patent/EP1268084B1/en not_active Expired - Lifetime
- 2001-02-15 ES ES01905491T patent/ES2234808T3/en not_active Expired - Lifetime
- 2001-02-15 DK DK01905491T patent/DK1268084T3/en active
- 2001-02-15 CA CA002400717A patent/CA2400717C/en not_active Expired - Lifetime
- 2001-02-15 PT PT01905491T patent/PT1268084E/en unknown
- 2001-02-15 WO PCT/AU2001/000149 patent/WO2001064353A1/en active IP Right Grant
- 2001-02-15 AT AT01905491T patent/ATE286784T1/en not_active IP Right Cessation
- 2001-02-15 DE DE60108362T patent/DE60108362T2/en not_active Expired - Fee Related
- 2001-02-15 NZ NZ520987A patent/NZ520987A/en not_active IP Right Cessation
- 2001-02-21 TW TW090104293A patent/TW486389B/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4081112A (en) * | 1976-10-12 | 1978-03-28 | Chang Peter J Y | Caulking gun |
EP0486455A2 (en) * | 1990-11-16 | 1992-05-20 | Peter J.Y. Chang | Variable thrust caulk dispensing device |
US5884818A (en) * | 1997-02-24 | 1999-03-23 | Campbell; Norman | Grease gun |
Also Published As
Publication number | Publication date |
---|---|
AUPQ598100A0 (en) | 2000-03-23 |
ATE286784T1 (en) | 2005-01-15 |
EP1268084B1 (en) | 2005-01-12 |
EP1268084A1 (en) | 2003-01-02 |
DE60108362D1 (en) | 2005-02-17 |
PT1268084E (en) | 2005-05-31 |
TW486389B (en) | 2002-05-11 |
ES2234808T3 (en) | 2005-07-01 |
DE60108362T2 (en) | 2005-06-02 |
EP1268084A4 (en) | 2003-04-02 |
DK1268084T3 (en) | 2005-05-30 |
NZ520987A (en) | 2003-01-31 |
CA2400717A1 (en) | 2001-09-07 |
CA2400717C (en) | 2009-11-10 |
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