US4570832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispensing device in the form of a caulking gun
Assignee: M Kroger Maskinfabrik AS
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Filing: 1984-03-22
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Granted: 1986-02-18
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Expires: 2004-03-22
Abstract
Abstract A dispensing device in the form of a caulking gun is adapted to receive interchangeable cartridges. In addition, it comprises means introducing compressed air at activation into the cartridge from behind so as pneumatically to press a piston plate present therein and consequently the material present in the cartridge forward towards the discharge nozzle of the cartridge. In order to permit an easy interchanging of the cartridge as well as to obtain a very simple caulking gun, the dispensing device comprises an open supporting means and a sealing piston. The sealing piston is adapted to be sealingly pressed against the rim of the cartridge from behind so as to close said rim when the cartridge is pressed against the front end of the supporting means. At the same time the caulking gun comprises a passage extending through the sealing piston so as to permit compressed air to enter at the rear end of the cartridge at activation.
Inventors
- 👤 Mogens Kroger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:18
CPC Classifications
B; B05; B05C; B05C17/00; B05C17/005; B05C17/015
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
154 words
A pneumatic caulking gun comprising a supporting means for receiving an interchangeable caulk-containing cartridge, said cartridge having a dispensing nozzle at its forward end and a rim at the rearward end, the caulking gun including a dispensing means comprising a source of pressurized air, a driving piston, a piston plate, a sealing piston capable of engaging the rim of said cartridge to close said rearward end, the sealing piston including a central passage in communication with said source of pressurized fluid whereby fluid pressure urges the caulk from the cartridge, the central passage including a valve member adapted to open at a predetermined pressure of the pressurized fluid, the dispensing means being arranged such that said fluid pressure urges the sealing piston into engagement with the cartridge and subsequently opens said valve when the predetermined pressure is attained thereby allowing fluid to flow through the central passage to urge the caulk from the cartridge.
Claim 2
Dependent Claim
154 words
A pneumatic caulking gun comprising a supporting means for receiving an interchangeable caulk-containing cartridge, said cartridge having a dispensing nozzle at its forward end and a rim at the rearward end, the caulking gun including a dispensing means comprising a source of pressurized air, a driving piston, a piston plate, a sealing piston capable of engaging the rim of said cartridge to close said rearward end, the sealing piston including a central passage in communication with said source of pressurized fluid whereby fluid pressure urges the caulk from the cartridge, the central passage including a valve member adapted to open at a predetermined pressure of the pressurized fluid, the dispensing means being arranged such that said fluid pressure urges the sealing piston into engagement with the cartridge and subsequently opens said valve when the predetermined pressure is attained thereby allowing fluid to flow through the central passage to urge the caulk from the cartridge.
Claim 3
Dependent Claim
47 words
A caulking gun as claimed in claim 1, characterized by the sealing piston being connected to the driving piston, said driving piston being displaceably mounted in a housing to which the compressed air enters, the central passage extending through the sealing piston and through said driving piston.
Claim 4
Dependent Claim
67 words
A caulking gun as claimed in claim 2, characterized by the supporting means being detachable from the dispensing means, the housing including a sleeve receiving the piston rod, said sleeve extending coaxially with the sealing piston and comprising a radial flange adapted to receive a radial plate member of the supporting means, where the plate member comprises a recess for receiving the axial portion of the sleeve.
Claim 5
Dependent Claim
173 words
A pneumatic caulking gun comprising a supporting means for receiving an interchangeable caulk-containing cartridge, said cartridge having a dispensing nozzle at its forward end and a rim at its rearward end, the caulking gun including a dispensing means comprising a housing receiving a reciprocating drive piston, a source of pressurized fluid for driving said drive piston connected to the housing, the driving piston having a piston rod including a sealing piston at one end, said sealing piston being capable of engaging the rim of the cartridge, the piston rod having a central passage for communicating the source of pressurized fluid to the cartridge when the sealing piston engages the cartridge, the central passage further including a pressure operated valve means, the dispensing means being arranged such that fluid pressure acts on the drive piston whereby the sealing piston is moved into sealing engagement with the cartridge and upon sufficient fluid pressure the valve means opens thereby supplying fluid pressure through the central passage to the cartridge to urge the caulk from the cartridge.
Claim 6
Dependent Claim
173 words
A pneumatic caulking gun comprising a supporting means for receiving an interchangeable caulk-containing cartridge, said cartridge having a dispensing nozzle at its forward end and a rim at its rearward end, the caulking gun including a dispensing means comprising a housing receiving a reciprocating drive piston, a source of pressurized fluid for driving said drive piston connected to the housing, the driving piston having a piston rod including a sealing piston at one end, said sealing piston being capable of engaging the rim of the cartridge, the piston rod having a central passage for communicating the source of pressurized fluid to the cartridge when the sealing piston engages the cartridge, the central passage further including a pressure operated valve means, the dispensing means being arranged such that fluid pressure acts on the drive piston whereby the sealing piston is moved into sealing engagement with the cartridge and upon sufficient fluid pressure the valve means opens thereby supplying fluid pressure through the central passage to the cartridge to urge the caulk from the cartridge.
References Cited (Backward Citations)
US1606034A
Cited
FR1255990A
Cited
US3319839A
Cited
US4453651A
Cited
US4376498A
Cited
EP0052060A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-17 | 1989-08-19 | 1990-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-17 | 1993-08-19 | 1994-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-17 | 1997-08-19 | 1998-02-18 | $7700.00 | Window Closed / Lapsed |