Patent US4285375A successfully refreshed from Google Patents.
US4285375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
T-Bar ratcheting screwdriver
Assignee: Individual
•
Filing: 1980-06-20
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Granted: 1981-08-25
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Expires: 2000-06-20
Abstract
Abstract A screwdriver assembly includes a detachable handle, a fixed non-rotatable socket and a dual ratcheting socket extending transverse to the axis of the handle to the screwdriver with the dual sockets to obtain reversal of the screwdriver rotation.
Inventors
- 👤 J. Bruce Judson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:53
CPC Classifications
B; B25; B25B; B25B15/00; B25B15/02; B25B15/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
169 words
A T-bar ratcheting screwdriver assembly comprising in combination: an elongated generally cylindrical handle for grasping in the hand including a socket fixed co-axially thereof for detachably receiving a screwdriver shank for rotation therewith, ratchet rotor means having teeth formed on the outer diameter thereof, and mounted in a transverse bore substantially midway between the ends of said handle and having a rotary axis transverse to the axis of said handle and a shank receiving socket in each end thereof extending to and accessible to opposite sides of said handle for alternately detachably receiving a screwdriver shank for reversible rotation thereof by said handle, and a pawl member slideably mounted in a channel extending along the axis of said handle and biased into engagement with said teeth, a screwdriver stem having a shank portion for removably mounting in said socket for rotation therewith said handle includes a bore coaxially in one end thereof communicating with said channel, and a plug member having said socket therein press fitted into said bore.
Claim 2
Dependent Claim
169 words
A T-bar ratcheting screwdriver assembly comprising in combination: an elongated generally cylindrical handle for grasping in the hand including a socket fixed co-axially thereof for detachably receiving a screwdriver shank for rotation therewith, ratchet rotor means having teeth formed on the outer diameter thereof, and mounted in a transverse bore substantially midway between the ends of said handle and having a rotary axis transverse to the axis of said handle and a shank receiving socket in each end thereof extending to and accessible to opposite sides of said handle for alternately detachably receiving a screwdriver shank for reversible rotation thereof by said handle, and a pawl member slideably mounted in a channel extending along the axis of said handle and biased into engagement with said teeth, a screwdriver stem having a shank portion for removably mounting in said socket for rotation therewith said handle includes a bore coaxially in one end thereof communicating with said channel, and a plug member having said socket therein press fitted into said bore.
Claim 3
Dependent Claim
31 words
The screwdriver of claim 1 including a spring mounted in said channel between said plug member and said pawl member for biasing said pawl member into engagement with said ratchet rotor.
References Cited (Backward Citations)
US304102A
Cited
US323145A
Cited
US366439A
Cited
US388637A
Cited
US1897854A
Cited
US2271887A
Cited
GB894363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |