US3612236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Threaded fastener-setting tool with torque release means
Assignee: Atlas Copco AB
•
Filing: 1970-06-22
•
Granted: 1971-10-12
•
Expires: 1990-06-22
Abstract
Abstract In the housing of a threaded fastener-setting tool with predetermined torque release, a motor rotates a driving clutch part and a rotatable tool spindle carrying a driven clutch part is movable in the housing from advanced to retracted position therein to bring the driving and driven clutch parts together into engagement for rotation of the tool spindle. During such engaging movement a separating spring is compressed between the clutch parts. At torque release the separating spring moves one of the clutch parts axially relative to the other and to the tool spindle to disengage the clutch parts while the tool spindle remains retracted. A bolt keeps normally said one clutch part poised therebetween and between said separating spring but is displaced by a torque responsive coupling to release disengagement.
Inventors
- 👤 Gustaf Harry Fernstrom
- 👤 Karl Ake Moberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:49
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/14; B25B23/145
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
191 words
A threaded fastener-setting tool with torque release means comprising a tool housing, a rotation motor in said tool housing, a power transmission in said tool housing rotatably connected to said motor, cooperating rotatable driving and driven clutch parts in said power transmission, a tool spindle carrying said driven clutch part and carried axially movably and rotatably in said tool housing between an advanced and a retracted position relative thereto for respectively disengaging or interengaging said clutch parts, a separating spring interposed between said clutch parts and expanded or compressed therebetween in respectively advanced or retracted position of said tool spindle, means supporting one of said clutch parts axially movably relative to said tool spindle, a bolt movably mounted between a position in abutting relation to said movable clutch part for keeping said movable clutch part poised between said separating spring and said bolt and a release position, and torque release means in operative engagement with said bolt for moving it to said release position to cause disengaging movement of said movable clutch part by expansion of said separating spring relative to said tool spindle in the retracted position of the latter.
Claim 2
Dependent Claim
191 words
A threaded fastener-setting tool with torque release means comprising a tool housing, a rotation motor in said tool housing, a power transmission in said tool housing rotatably connected to said motor, cooperating rotatable driving and driven clutch parts in said power transmission, a tool spindle carrying said driven clutch part and carried axially movably and rotatably in said tool housing between an advanced and a retracted position relative thereto for respectively disengaging or interengaging said clutch parts, a separating spring interposed between said clutch parts and expanded or compressed therebetween in respectively advanced or retracted position of said tool spindle, means supporting one of said clutch parts axially movably relative to said tool spindle, a bolt movably mounted between a position in abutting relation to said movable clutch part for keeping said movable clutch part poised between said separating spring and said bolt and a release position, and torque release means in operative engagement with said bolt for moving it to said release position to cause disengaging movement of said movable clutch part by expansion of said separating spring relative to said tool spindle in the retracted position of the latter.
Claim 3
Dependent Claim
57 words
A threaded fastener-setting tool according to claim 1 in which said torque release means includes a clutch housing, an axial socket in said clutch housing receiving said movable clutch part axially movably and depressably into said socket, and a zero-setting spring between said socket and movable clutch part, said zero-setting spring being weaker than said separating spring.
Claim 4
Dependent Claim
48 words
A threaded fastener-setting tool according to claim 2 in which said bolt is journaled transversely movably within said clutch housing inwardly of said socket and said movable clutch part has a point thereon coaxial with said tool spindle and abutting against said bolt in the abutting position thereof.
Claim 5
Dependent Claim
77 words
A threaded fastener-setting tool according to claim 3 in which said bolt has an opening thereon alignable with said point in the release position of said bolt, a snap spring in said clutch housing for urging said bolt radially outwardly in said clutch housing and said opening out of alignment with said point, and cam means at the outer end of said bolt for the displacement thereof radially inward and alignment of said opening with said point.
Claim 6
Dependent Claim
101 words
A threaded fastener-setting tool according to claim 2 in which said movable clutch part has a polygonal outer portion, apertures in said clutch housing around said socket thereof, balls in said apertures each engaging with the radially inward portion thereof one of the sides of said polygonal portion, a sleeve slidable on said clutch housing in camming engagement with the radially outward portions of said balls, a loading spring for biasing said sleeve against said balls and said balls against said sides, and cooperating cam means on said sleeve and said bolt for moving the latter to said release posiTion thereof.
Claim 7
Dependent Claim
106 words
A threaded fastener-setting tool according to claim 1 in which said motor is a pressure fluid-actuated motor, a passage for conveying pressure fluid to said motor, a valve movable between open and closed position in said passage for controlling said motor, actuating means extending between said movable clutch part and said valve for moving said valve from closed to open position when said tool spindle is moved from the advanced to the retracted position thereof, and an abutment surface on said bolt defining a disengaging position for said movable clutch part in which disengaging position said actuating means maintains said valve in the open position thereof.
Claim 8
Dependent Claim
35 words
A threaded fastener-setting tool according to claim 1 in which said movable clutch part has a central spindle thereon rotatably and axially slidably guided in said other clutch part and surrounded by said separating spring.
Claim 9
Dependent Claim
50 words
A threaded fastener-setting tool according to claim 7 in which there are provided cooperating axially facing sliding surfaces circumferentially on said clutch housing and said other clutch part for defining said retracted position of said tool spindle and permitting relative rotation therein between said other clutch part and clutch housing.
Claim 10
Dependent Claim
19 words
A threaded fastener-setting tool according to claim 2 in which said tool spindle is connected to said clutch housing.
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |