US4187747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick release mechanism for socket wrench
Assignee: NATIONAL HAND TOOL Corp A CORP OF
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Filing: 1978-02-21
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Granted: 1980-02-12
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Expires: 1998-02-21
Abstract
Abstract The driving stud of a socket wrench includes an aperture through which a detent protrudes to lock a socket thereon. A push bar mounted in the head of the socket wrench is notched to receive the detent and may be shifted to allow retraction of the detent and release of the socket. The notch is formed with a trough to prevent twisting of the push bar with respect to the axis of the aperture and to insure the proper seating of the detent on two surfaces of the trough.
Inventors
- 👤 Roy E. Pawlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:40
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/02; B25B13/06; B25B23/00; B25B23/0007; B25B23/0035
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
221 words
In a socket wrench having an elongated handle, a head on one end of the handle, a driving stud protruding from the head for driving by engaging a socket thereon, and an axial passage in the driving stud, a mechanism comprising: an aperture in a side wall of said driving stud communicating with the axial passage, a spherical detent positioned within the aperture, an elongated flat push bar means in the axial passage for urging the detent to protrude from the side wall through the aperture, the flat push bar means having a thickness which is substantially less than the diameter of the spherical detent, a notch in one end of the flat push bar means, the notch comprising a constant depth portion and a sloped portion wherein the sloped portion is effective at one end thereof to urge the detent to protrude from the aperture and at the other end to allow the detent to retract into the aperture, resilient means for biasing said push bar means, and two surface means in the sloped portion of the notch, the two surface means contacting the spherical detent at spaced points to provide a positive seating surface for the detent, to urge the detent to protrude from the aperture, and to prevent the push bar means from rotating within the driving stud.
Claim 2
Dependent Claim
221 words
In a socket wrench having an elongated handle, a head on one end of the handle, a driving stud protruding from the head for driving by engaging a socket thereon, and an axial passage in the driving stud, a mechanism comprising: an aperture in a side wall of said driving stud communicating with the axial passage, a spherical detent positioned within the aperture, an elongated flat push bar means in the axial passage for urging the detent to protrude from the side wall through the aperture, the flat push bar means having a thickness which is substantially less than the diameter of the spherical detent, a notch in one end of the flat push bar means, the notch comprising a constant depth portion and a sloped portion wherein the sloped portion is effective at one end thereof to urge the detent to protrude from the aperture and at the other end to allow the detent to retract into the aperture, resilient means for biasing said push bar means, and two surface means in the sloped portion of the notch, the two surface means contacting the spherical detent at spaced points to provide a positive seating surface for the detent, to urge the detent to protrude from the aperture, and to prevent the push bar means from rotating within the driving stud.
Claim 3
Dependent Claim
42 words
The mechanism of claim 1 further comprising: a V-shaped trough comprising said two surface means, the axis of said V-shaped trough and of the axial passage lying in a common plane which bisects the trough along the longitudinal axis of the V.
Claim 4
Dependent Claim
60 words
The mechanism of claim 1 further comprising: button means for actuating the push bar means against the biasing force of the resilient means, whereby the detent may retract into the aperture, and a convex surface formed on the abutting surface of the button means and said first means, whereby clutching between the button and the push bar means is prevented.
References Cited (Backward Citations)
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Cited
US2954994A
Cited
US3208318A
Cited
US3532013A
Cited
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US3762245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |