US4476751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple screwdriver
Assignee: Individual
•
Filing: 1983-08-30
•
Granted: 1984-10-16
•
Expires: 2003-08-30
Abstract
Abstract A multiple screwdriver having a grip and a plurality of bits coupled to the grip at one end. Each bit has a coupling plate comprising a slant portion and a straight portion parallel to the axis of the bit. The bit is coupled to the grip with its coupling plate in axial slits formed in the head of the grip.
Inventors
- 👤 Yoshiaki Mishima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:00
CPC Classifications
B; B25; B25G; B25G1/00; B25G1/08; B25G1/085
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
194 words
A multiple screwdriver comprises a grip having a support at one end thereof, a plurality of bits coupled at one end thereof to said support, said support being formed with as many axial slits as said bits so as to extend downwardly from its top and with a center hole communicating with said slits to receive said each bit, said each slit having on its opposing walls a pair of axial guide grooves which have a shoulder adjacent to its upper end, each of said bits being formed at its coupled end with a coupling plate having a slant portion and a straight portion parallel with the axis of said bit, said coupling plate being formed on each side thereof with a projection, said coupling plate of said each bit being adapted to fit in said slit with said projections in said guide grooves, whereby said each bit is axially slidable along said axial guide grooves and pivotable around said projections between its inoperative position where said bit is folded on the side of said grip and its operative position where said bit is aligned with said grip and pushed into said center hole.
Claim 2
Dependent Claim
194 words
A multiple screwdriver comprises a grip having a support at one end thereof, a plurality of bits coupled at one end thereof to said support, said support being formed with as many axial slits as said bits so as to extend downwardly from its top and with a center hole communicating with said slits to receive said each bit, said each slit having on its opposing walls a pair of axial guide grooves which have a shoulder adjacent to its upper end, each of said bits being formed at its coupled end with a coupling plate having a slant portion and a straight portion parallel with the axis of said bit, said coupling plate being formed on each side thereof with a projection, said coupling plate of said each bit being adapted to fit in said slit with said projections in said guide grooves, whereby said each bit is axially slidable along said axial guide grooves and pivotable around said projections between its inoperative position where said bit is folded on the side of said grip and its operative position where said bit is aligned with said grip and pushed into said center hole.
Claim 3
Dependent Claim
21 words
The multiple screwdriver as claimed in claim 1 wherein said grip is formed with axial grooves to receive said bits therein.
Claim 4
Dependent Claim
40 words
The multiple screwdriver as claimed in claim 1 wherein said each bit is formed with a pair of projections at position where it connects with said coupling plate and with another projection on said coupling plate at inner side thereof.
Claim 5
Dependent Claim
25 words
The multiple screwdriver as claimed in claim 1 wherein said support is formed with an annular groove to receive a ring of an elastic material.
Claim 6
Dependent Claim
40 words
The multiple screwdriver as claimed in claim 1 wherein said support is formed with an annular groove to receive a slitted ring, said slitted ring being adapted to partially fit in notches formed in said coupling plates on said bits.
References Cited (Backward Citations)
DE464002C
Cited
US3892149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |