Patent US3746235A successfully refreshed from Google Patents.
US3746235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power control for powder-actuated tool
Assignee: Illinois Tool Works Inc
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Filing: 1972-01-12
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Granted: 1973-07-17
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Expires: 1992-01-12
Abstract
Abstract A powder-actuated tool utilizing a ram for driving a fastener into a supporting surface. The tool includes means for varying the power output of the ram. A stop lug is mounted on the tool housing and movable longitudinally thereon. The lug engages a complimentary stop surface on the tool barrel which is slidable within the housing. Engagement of the stop lug and barrel stop surface limit forward movement of the barrel which movement is operative to return the ram from a driven position to a driving position.
Inventors
- 👤 R Crabtree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:09
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/08; B25C1/10; B25C1/14; B25C1/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
323 words
A powder-actuated tool for explosively driving a fastener into a supporting surface, said tool comprising: a. housing means; b. barrel means carried by said housIng means and movable with respect thereto toward and away from a breech-closed portion; c. firing chamber means opening into said barrel means; d. ram means slidably mounted in said barrel means and movable between a firing position and a fired position; e. means providing an expansion chamber between said firing chamber means and said ram means, the volume of said expansion chamber being proportional to the distance between said ram means and said firing chamber means, and the power output of the tool being inversely proportional to the volume of said expansion chamber; f. ram-engaging means secured to said housing means and disposed for engagement with said ram means to move the latter from its driven position to its driving position when said barrel means is moved away from said breech-closed position; and g. power output control means including stop means mounted on said housing means and axially movable therealong and securable thereto between a plurality of offset positions spaced apart different distances from said firing chamber means, said stop means being operative to stop movement of said barrel means away from said breech-closed position with the extent of movement of said barrel means away from said breech-closed position being determined by the axial position of said stop means, whereby said ram means is positioned closer to said firing chamber means the further from said firing chamber means said stop means is positioned, said power output control means including first axial slot means in said housing means, and second axial slot means in said barrel means, said second axial slot means underlying said first axial slot means, said second axial slot means having an end wall providing a further stop surface for engaging said stop means mounted on said housing means to stop movement of said barrel means.
Claim 2
Dependent Claim
323 words
A powder-actuated tool for explosively driving a fastener into a supporting surface, said tool comprising: a. housing means; b. barrel means carried by said housIng means and movable with respect thereto toward and away from a breech-closed portion; c. firing chamber means opening into said barrel means; d. ram means slidably mounted in said barrel means and movable between a firing position and a fired position; e. means providing an expansion chamber between said firing chamber means and said ram means, the volume of said expansion chamber being proportional to the distance between said ram means and said firing chamber means, and the power output of the tool being inversely proportional to the volume of said expansion chamber; f. ram-engaging means secured to said housing means and disposed for engagement with said ram means to move the latter from its driven position to its driving position when said barrel means is moved away from said breech-closed position; and g. power output control means including stop means mounted on said housing means and axially movable therealong and securable thereto between a plurality of offset positions spaced apart different distances from said firing chamber means, said stop means being operative to stop movement of said barrel means away from said breech-closed position with the extent of movement of said barrel means away from said breech-closed position being determined by the axial position of said stop means, whereby said ram means is positioned closer to said firing chamber means the further from said firing chamber means said stop means is positioned, said power output control means including first axial slot means in said housing means, and second axial slot means in said barrel means, said second axial slot means underlying said first axial slot means, said second axial slot means having an end wall providing a further stop surface for engaging said stop means mounted on said housing means to stop movement of said barrel means.
Claim 3
Dependent Claim
40 words
The tool of calim 1, wherein said stop means is mounted in said first axial slot means, and said offset positions are defined by offset notches in said first axial slot means to which notches said stop means is securable.
Claim 4
Dependent Claim
40 words
The tool of calim 1, wherein said stop means is mounted in said first axial slot means, and said offset positions are defined by offset notches in said first axial slot means to which notches said stop means is securable.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |