US3918619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for seal fixing apparatus
Assignee: Individual
•
Filing: 1973-12-21
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Granted: 1975-11-11
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Expires: 1993-12-21
Abstract
Abstract Fastening apparatus in the form of a gun in which the energy resulting from the explosion of a cartridge drives a piston which in turn drives the fastener, such as a nail, bolt or the like into the material to be fastened. The barrel with its muzzle, cartridge chamber, breech block, and firing device forms an assembly which slides in a tubular casing rigidly attached to the stock of the apparatus which carries the trigger, the assembly being urged by means of a spring in the firing direction. The trigger is only able to operate the firing device when the front end of the muzzle of the barrel is protruding from the tubular casing by a length less than a given length.
Inventors
- 👤 Pierre Termet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:44
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/08; B25C1/10; B25C1/14; B25C1/143
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
248 words
Cartridge-actuated fastening device including: a slidable assembly comprising a barrel, a muzzle at one end of said barrel, a cartridge chamber at the other end of said barrel, and a breech-block and percussion means for exploding said cartridge located on the side of said chamber remote from said barrel, a driving piston slidably mounted in said barrel for actuation by the gases produced by an explosion in said cartridge chamber to eject a fastener from said muzzle and, a tubular casing having a handle near one end thereof, said assembly being mounted for axial sliding movement in said casing, spring means biassing said assembly so that said muzzle projects from the other end of said casing for a predetermined distance except when said spring means is compressed by pressing said muzzle against a material in which said fastener is to be driven, latch means carried by said assembly and movable between a first position in which said latch means does and a second position in which it does not prevent operation of said percussion means, a trigger mounted on said handle, catch means carried by said trigger moving said latch means to said second position when said catch means is in engagement with said latch means and said trigger is actuated, said latch means being spaced from a position in which it is engaged by said catch means by a distance no greater than said predetermined distance whenever said muzzle projects said predetermined distance from said tubular member.
Claim 2
Dependent Claim
248 words
Cartridge-actuated fastening device including: a slidable assembly comprising a barrel, a muzzle at one end of said barrel, a cartridge chamber at the other end of said barrel, and a breech-block and percussion means for exploding said cartridge located on the side of said chamber remote from said barrel, a driving piston slidably mounted in said barrel for actuation by the gases produced by an explosion in said cartridge chamber to eject a fastener from said muzzle and, a tubular casing having a handle near one end thereof, said assembly being mounted for axial sliding movement in said casing, spring means biassing said assembly so that said muzzle projects from the other end of said casing for a predetermined distance except when said spring means is compressed by pressing said muzzle against a material in which said fastener is to be driven, latch means carried by said assembly and movable between a first position in which said latch means does and a second position in which it does not prevent operation of said percussion means, a trigger mounted on said handle, catch means carried by said trigger moving said latch means to said second position when said catch means is in engagement with said latch means and said trigger is actuated, said latch means being spaced from a position in which it is engaged by said catch means by a distance no greater than said predetermined distance whenever said muzzle projects said predetermined distance from said tubular member.
Claim 3
Dependent Claim
51 words
Device as claimed in claim 1 in which said catch means is in the form of a fork and the latch means is a rod having a head beneath which said fork engages to move said latch means when said trigger is actuated with said muzzle pressed into said tubular member.
Claim 4
Dependent Claim
26 words
Device as claimed in claim 1 in which said muzzle has an external peripheral chamfer at an angle of 60* to the axis of said nozzle.
Claim 5
Dependent Claim
64 words
Device as claimed in claim 1 in which said barrel carries threads which engage correspondingly threaded means fixed to said cartridge chamber and comprising a control member connected to rotate said barrel relative to said threaded means and thereby alter the axial position of said barrel relative to said cartridge chamber to provide at least one gas vent between said barrel and cartridge chamber.
Claim 6
Dependent Claim
44 words
Device as claimed in claim 4 in which said muzzle is slidably mounted in said casing for movement toward and away from said barrel and said muzzle and casIng are provided with abutment means which interengage to limit the sliding movement of said muzzle.
Claim 7
Dependent Claim
50 words
Device as claimed in claim 5 in which the abutment means on said muzzle is brought closer to the abutment means on said casing as said barrel is moved away from said cartridge chamber, thereby decreasing the extent to which said muzzle is permitted to move away from said barrel.
Claim 8
Dependent Claim
63 words
Device as claimed in claim 4 in which said control member is a sleeve forming part of said casing and rotatable with respect to the remainder of said casing, said sleeve encircling said barrel, and said barrel and sleeve being provided with interfitting slot and projecting means which cause said barrel to rotate with said sleeve, while permitting relative axial sliding movement therebetween.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |