Patent US3899113A successfully refreshed from Google Patents.
US3899113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosively actuated fastener driving power tools
Assignee: Olin Ski AG
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Filing: 1973-08-03
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Granted: 1975-08-12
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Expires: 1993-08-03
Abstract
Abstract An explosively actuated fastener driving power tool of the type comprising a piston rod slidingly mounted into the bore of a front part of the tool, said front part having stop means for the piston rod in its return motion, said front part being mounted on a rear part carrying the propelling charge, said rear part providing between the propelling charge and the rear end of the piston rod a gas expansion chamber for the combustion of said charge, said front and rear parts being adapted to occupy various axial positions with respect to each other in order to cause variations in the volume of said expansion chamber, wherein that said rear stop means are adapted to be drawn aside when the front and rear parts are disassembled.
Inventors
- 👤 Jacques Brack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:52
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/08; B25C1/10; B25C1/18; B25C1/082
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
163 words
An explosively actuated fastener driving tool of the type comprising, in combination: a front part and a rear part, means removably connecting said front and rear parts to each other, said front part including an axial bore; a piston rod slidingly mounted in said bore; and stop means including poRtions projected into said bore in the vicinity of said rear part for cooperating with the rear end of the piston rod to limit its motion toward the rear when said rear part is connected to said front part, said portions of said stop means being slidable out of said bore when said rear part is removed from said front part, said rear part providing between a propelling charge and said rear end of the piston rod a gas expansion chamber, said means removably connecting said front and rear parts to each other permitting axial adjustment between said front and rear parts in order to cause variations in the volume of said expansion chamber.
Claim 2
Dependent Claim
163 words
An explosively actuated fastener driving tool of the type comprising, in combination: a front part and a rear part, means removably connecting said front and rear parts to each other, said front part including an axial bore; a piston rod slidingly mounted in said bore; and stop means including poRtions projected into said bore in the vicinity of said rear part for cooperating with the rear end of the piston rod to limit its motion toward the rear when said rear part is connected to said front part, said portions of said stop means being slidable out of said bore when said rear part is removed from said front part, said rear part providing between a propelling charge and said rear end of the piston rod a gas expansion chamber, said means removably connecting said front and rear parts to each other permitting axial adjustment between said front and rear parts in order to cause variations in the volume of said expansion chamber.
Claim 3
Dependent Claim
22 words
A power tool according to claim 1 wherein the front part is threaded and screwed into a threading of the rear part.
Claim 4
Dependent Claim
43 words
A power tool according to claim 2, wherein the front part has at least one axial groove, a ring having at least one radial catch, the ring and a spring mounted on the front part, said spring urging said ring toward said rear.
Claim 5
Dependent Claim
100 words
A power tool according to claim 1, wherein said stop means includes at least one stop member slidingly mounted within a transverse bore formed in said front part, transverse bore being opened at one end into the said axial bore of the front part and at the other end at the outside of said front part in an area thereof which is always covered by said rear part when said front and rear parts are assembled together, the maximum dimension of said stop member along the length of said transverse bore being greater than the length of said transverse bore.
Claim 6
Dependent Claim
14 words
A power tool according to claim 4 wherein said stop member is a ball.
Claim 7
Dependent Claim
32 words
A power tool according to claim 4, wherein the front part is provided with marks and the rear part is provided with at least one window for the reading of said marks.
Claim 8
Dependent Claim
38 words
A power tool according to claim 4, wherein the rear part comprises means for setting up communication between the expansion chamber and the atmosphere, said means operating when the front part is loosely connected to the rear part.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |