US5265504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cartridge type screwdriver
Assignee: Winsire Enterprises Corp
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Filing: 1992-12-01
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Granted: 1993-11-30
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Expires: 2012-12-01
Abstract
Abstract A multiple bit screwdriver employs a breach loading magazine to store a plurality of bits. The magazine is enclosed inside the hollow handle of the screwdriver and is extracted along the axis of the screwdriver when the end-cap of the handle is pulled. The bits are stored in the magazine and are located about the circumference of the magazine tube that reciprocates relative to the screwdriver. When the magazine is fully extracted, the bits are easily viewed and may be individually removed from or replaced in the clips applying a simple radial force.
Inventors
- 👤 Hermann Fruhm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:13
CPC Classifications
B; B25; B25G; B25G1/00; B25G1/08; B25G1/085
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
A multiple bit type tool comprising a chuck, a first shaft extending from said chuck within a handle, a second barrel shaft longitudinally movable on said first shaft from a first position wherein said second barrel shaft is substantially wholly within said handle to a second position wherein said second barrel shaft is substantially outside said handle; a end-cap mounted on and movable with said second barrel shaft, said end-cap closing the end of said handle when said second barrel shaft is in said first position and opening the end of said handle when said second barrel shaft is in said second position; and a magazine mounted on and movable with said second barrel shaft, said magazine being within said handle when said second barrel shaft is in said first position and outside said handle when said second barrel shaft is in said second position.
Claim 2
Dependent Claim
145 words
A multiple bit type tool comprising a chuck, a first shaft extending from said chuck within a handle, a second barrel shaft longitudinally movable on said first shaft from a first position wherein said second barrel shaft is substantially wholly within said handle to a second position wherein said second barrel shaft is substantially outside said handle; a end-cap mounted on and movable with said second barrel shaft, said end-cap closing the end of said handle when said second barrel shaft is in said first position and opening the end of said handle when said second barrel shaft is in said second position; and a magazine mounted on and movable with said second barrel shaft, said magazine being within said handle when said second barrel shaft is in said first position and outside said handle when said second barrel shaft is in said second position.
Claim 3
Dependent Claim
42 words
A tool as in claim 1 wherein said magazine has a plurality of resilient bit holders, said bit holders being mounted about the circumference of said second barrel shaft and being adapted to allow mounting and removal of a plurality of bits.
Claim 4
Dependent Claim
23 words
A tool as in claim 1 wherein said end-cap is rotatable relative to said handle when said end-cap is in its closed position.
Claim 5
Dependent Claim
18 words
A tool as in claim 3 and further including a bearing rotatable on and relative to said handle.
Claim 6
Dependent Claim
15 words
A tool as in claim 1, wherein said magazine is rotatable relative to said handle.
Claim 7
Dependent Claim
45 words
A tool as in claim 1 and further comprising means operative between said first shaft and said second barrel shaft for maintaining said end-cap in its closed position and for producing friction during longitudinal movement of said second barrel shaft relative to said first shaft.
Claim 8
Dependent Claim
80 words
The tool as in claim 6, wherein said means for maintaining said end-cap in its closed position and for producing friction during said longitudinal movement comprises a resilient clip on said first shaft which is in contact with the inside of said second barrel shaft and including a recess in said second barrel shaft to accommodate said resilient clip when said second barrel shaft is in said first position so as to maintain the end cap in its closed position.
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) | 1996-11-29 | 1997-05-31 | 1997-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-29 | 2001-05-31 | 2001-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-29 | 2005-05-31 | 2005-11-30 | $7700.00 | Window Closed / Lapsed |