Patent US3768345A successfully refreshed from Google Patents.
US3768345A
Expired / Lapsed
US
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Lock nut drive head
Assignee: Individual
•
Filing: 1972-01-17
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Granted: 1973-10-30
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Expires: 1992-01-17
Abstract
Abstract A spanner type drive head is presented for serrated lock nuts used in electrical terminal blocks, the drive head having teeth for mating with the serrations of the lock nut and also having an aperture or mouth to accommodate electrical cable in the terminal box.
Inventors
- 👤 J Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:29
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/48; B25B13/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
A lock nut drive head including: a body having a top portion; a side skirt depending from said top portion, said top and said side skirt cooperating to define an interior cavity; an aperture defined in said side skirt and said top portion, said aperture and said interior cavity being adapted to accomodate a cable extending through a lock nut; and a plurality of spaced teeth depending from said skirt at the end thereof removed from said top portion, said teeth being equally spaced apart about said skirt commensurate with spacings on a lock nut and being adapted to for driving engagement with a serrated lock nut.
Claim 2
Dependent Claim
107 words
A lock nut drive head including: a body having a top portion; a side skirt depending from said top portion, said top and said side skirt cooperating to define an interior cavity; an aperture defined in said side skirt and said top portion, said aperture and said interior cavity being adapted to accomodate a cable extending through a lock nut; and a plurality of spaced teeth depending from said skirt at the end thereof removed from said top portion, said teeth being equally spaced apart about said skirt commensurate with spacings on a lock nut and being adapted to for driving engagement with a serrated lock nut.
Claim 3
Dependent Claim
21 words
A lock nut drive head as in claim 1 including: an opening in said top portion to receive a driving tool.
Claim 4
Dependent Claim
41 words
A lock nut drive head as in claim 1 wherein said top portion and said skirt are separate elements welded together, said skirt having a recess at at least one location filled with weld material fusing said skirt to said top.
References Cited (Backward Citations)
US798325A
Cited
US2909090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |