Patent US3713573A successfully refreshed from Google Patents.
US3713573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device on a compressed air operated drive in apparatus to drive in fasteners
Assignee: Individual
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Filing: 1971-02-25
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Granted: 1973-01-30
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Expires: 1991-02-25
Abstract
Abstract This apparatus comprises a housing, a cylinder having limited movement relative to the housing and a magazine for fasteners, attached to the cylinder and having a foot to engage a work piece and through which fasteners from the magazine are driven into the work piece. A piston in the cylinder has a plunger to drive fasteners through said foot. A valve means controls supply of compressed air to the cylinder to move the piston for driving a fastener. Manually actuable means, and means dependent on both movement of the cylinder when the foot is placed on the work piece, and on manual actuation of said manually actuated means, to actuate said valve means to supply compressed air to the cylinder to move said piston to drive a fastener.
Inventors
- 👤 H Fehrs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:19
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/04; B25C1/041; B25C1/043
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
177 words
Apparatus to drive fasteners, comprising a housing, a cylinder projecting into said housing and having limited movement relative to said housing, a magazine for fasteners fixed to said cylinder, a piston movable in said cylinder, means on said piston to drive a fastener from said magazine each time the piston is moved in one direction in said cylinder, valve means on the housing to control supply of compressed air to said cylinder, to move said piston in said direction, manually actuable means movably mounted on said housing, foot means fixed relative to said cylinder to engage a work piece and through which fasteners are driven from the magazine, and control means dependent upon both movement of said cylinder by engagement of said foot with said work piece and actuation of said manually actuable means, to actuate said valve means to supply compressed air to said cylinder to move said piston in said direction, and to prevent actuation of said valve means unless said manually actuable means is in actuated condition while said cylinder is in moved condition.
Claim 2
Dependent Claim
177 words
Apparatus to drive fasteners, comprising a housing, a cylinder projecting into said housing and having limited movement relative to said housing, a magazine for fasteners fixed to said cylinder, a piston movable in said cylinder, means on said piston to drive a fastener from said magazine each time the piston is moved in one direction in said cylinder, valve means on the housing to control supply of compressed air to said cylinder, to move said piston in said direction, manually actuable means movably mounted on said housing, foot means fixed relative to said cylinder to engage a work piece and through which fasteners are driven from the magazine, and control means dependent upon both movement of said cylinder by engagement of said foot with said work piece and actuation of said manually actuable means, to actuate said valve means to supply compressed air to said cylinder to move said piston in said direction, and to prevent actuation of said valve means unless said manually actuable means is in actuated condition while said cylinder is in moved condition.
Claim 3
Dependent Claim
177 words
Apparatus to drive fasteners, comprising a housing, a cylinder projecting into said housing and having limited movement relative to said housing, a magazine for fasteners fixed to said cylinder, a piston movable in said cylinder, means on said piston to drive a fastener from said magazine each time the piston is moved in one direction in said cylinder, valve means on the housing to control supply of compressed air to said cylinder, to move said piston in said direction, manually actuable means movably mounted on said housing, foot means fixed relative to said cylinder to engage a work piece and through which fasteners are driven from the magazine, and control means dependent upon both movement of said cylinder by engagement of said foot with said work piece and actuation of said manually actuable means, to actuate said valve means to supply compressed air to said cylinder to move said piston in said direction, and to prevent actuation of said valve means unless said manually actuable means is in actuated condition while said cylinder is in moved condition.
Claim 4
Dependent Claim
177 words
Apparatus to drive fasteners, comprising a housing, a cylinder projecting into said housing and having limited movement relative to said housing, a magazine for fasteners fixed to said cylinder, a piston movable in said cylinder, means on said piston to drive a fastener from said magazine each time the piston is moved in one direction in said cylinder, valve means on the housing to control supply of compressed air to said cylinder, to move said piston in said direction, manually actuable means movably mounted on said housing, foot means fixed relative to said cylinder to engage a work piece and through which fasteners are driven from the magazine, and control means dependent upon both movement of said cylinder by engagement of said foot with said work piece and actuation of said manually actuable means, to actuate said valve means to supply compressed air to said cylinder to move said piston in said direction, and to prevent actuation of said valve means unless said manually actuable means is in actuated condition while said cylinder is in moved condition.
Claim 5
Dependent Claim
33 words
The combination of claim 1, said valve means being actuable to supply compressed air to said cylinder, irrespective of whether the cylinder is moved before or after the manually actuable means is actuated.
Claim 6
Dependent Claim
49 words
The combination of claim 1, said control means comprising means to prevent actuation of said manually actuable means before said cylinder has been moved and to allow actuation of said manually actuable means only after said cylinder has been moved by engagement of said foot with said work piece.
Claim 7
Dependent Claim
25 words
The combination of claim 1, and conduiT means to supply pressure air to return said cylinder upon the foot being disengaged from the work piece.
Claim 8
Dependent Claim
17 words
The combination of claim 1, said manually actuable means comprising a trigger lever pivoted to said housing.
Claim 9
Dependent Claim
30 words
The combination of claim 5, and means fixed relative to the housing to stop rotation of said lever in one direction through a predetermined angle from an initial angular position.
Claim 10
Dependent Claim
60 words
The combination of claim 6, and means controlled by said cylinder to prevent rotation of said lever away from said initial position when said foot is not on the work piece, and to permit rotation of said lever away from said initial position through said predetermined angle, when said foot is on said work piece and the cylinder has moved.
Claim 11
Dependent Claim
55 words
The combination of claim 1, said manual actuable means comprising a trigger lever pivoted to said housing, and a member having a portion engaging said cylinder and a portion engaging said lever, and a valve pin slidably mounted on said valve means, said member having means interposed between said portions thereof to move said pin.
Claim 12
Dependent Claim
55 words
The combination of claim 8, means fixed relative to said housing to stop rotation of said lever in one direction through a predetermined angle from an initial position, said member having a lost motion arrangement relative to said pin when said lever is in its initial position and said foot is off the work piece.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |