US5052253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screwdriver
Assignee: Individual
•
Filing: 1990-08-01
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Granted: 1991-10-01
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Expires: 2010-08-01
Abstract
Abstract A screwdriver comprising a handle having a sleeve mounted on the blade thereof for releasably fastening a screw head retainer socket to secure the device to a screw to be fastened or loosened. The handle is comprised of two sections which are permitted to rotate against each other.
Inventors
- 👤 Ching-Jou Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:13
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/02; B25B23/08; B25B23/10; B25B23/101; B25B15/00; B25B15/02; B25G; B25G1/00; B25G1/04; B25G1/043; B25G1/046
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
A screwdriver comprising: a) a handle including a main body portion having a substantially truncated cone configuration and a hollow end portion having an outer wall and a substantially semispherical configuration, the hollow end portion including an internal ring-shaped flange having a bottom edge, a round hole therein and defining a continuous circular channel with the outer wall; b) a screw driving tool secured in an opposite end of the handle for driving screws; and c) a swivel member secured to the handle at the hollow end portion thereof, the swivel member including a plurality of retainer elements extending through the round hole of the ring-shaped flange and disposed in locking engagement with the bottom edge of the flange to permit the swivel member and the handle to rotate relative to each other through 360°, and a plurality of slide blocks disposed in sliding engagement within the circular channel for stabilizing the relative rotation of the swivel member and the handle.
Claim 2
Dependent Claim
161 words
A screwdriver comprising: a) a handle including a main body portion having a substantially truncated cone configuration and a hollow end portion having an outer wall and a substantially semispherical configuration, the hollow end portion including an internal ring-shaped flange having a bottom edge, a round hole therein and defining a continuous circular channel with the outer wall; b) a screw driving tool secured in an opposite end of the handle for driving screws; and c) a swivel member secured to the handle at the hollow end portion thereof, the swivel member including a plurality of retainer elements extending through the round hole of the ring-shaped flange and disposed in locking engagement with the bottom edge of the flange to permit the swivel member and the handle to rotate relative to each other through 360°, and a plurality of slide blocks disposed in sliding engagement within the circular channel for stabilizing the relative rotation of the swivel member and the handle.
Claim 3
Dependent Claim
122 words
The screwdriver of claim 1 further including: a) a link rod fastened in the handle, the link rod including a tip driving socket for driving a screw turning tip; b) a sleeve slidably received on the link rod, the sleeve including an outer thread formed on a bottom end and a reduced bore formed on a top end; c) a compression spring received on the link rod within the sleeve, the spring being positioned between the reduced bore of the sleeve and the tip driving socket; and d) a screw head retainer socket including an inner thread at one end thereof for detachable connection with the outer thread at the bottom end of the sleeve to retain the head of a screw.
Claim 4
Dependent Claim
24 words
The screwdriver of claim 2 wherein the tip driving socket includes an internal bore of polygonal cross-section for engagement by the screw turning tip.
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) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |