US3971239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock
Assignee: PHELPS TIME RECORDING LOCK CORP
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Filing: 1975-02-07
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Granted: 1976-07-27
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Expires: 1995-02-07
Abstract
Abstract A lock is provided having a cover and a casing in which the cover is normally removable from the lock. The casing has an opening to receive a bolt therethrough, and means on the cover to engage the bolt whereby the cover cannot be removed from the casing when the bolt is in its advanced position.
Inventors
- 👤 Stanley Lavis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:42
CPC Classifications
E; E05; E05B; E05B35/00; E05B35/08; E05B35/12; E05B63/00; E05B63/0017; E05B9/00; E05B9/08; E05B9/082; Y; Y10; Y10T; Y10T292/00; Y10T292/06; Y10T292/62; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5246; Y10T70/5296; Y10T70/5319; Y10T70/5341; Y10T70/80; Y10T70/8432; Y10T70/8459
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A lock having a casing and a cover, a bolt mounted for sliding movement in said casing, said bolt having a pair of flanges thereon, said casing having a bolt receiving opening in one end thereof, said opening being completely surrounded by the material of the casing, said bolt being slidable between an advanced and retracted position relative to said casing, said bolt extending through said opening in said advanced position; and means on said cover for engaging the bolt to prevent removal of said cover when said bolt is in said advanced position comprising a pair of projections mounted on said cover and extending into said casing, said projections each being L-shaped, each of said flanges resting in a different one of said L-shaped projections at least when said bolt is in the advanced position, said cover being locked to said casing by the projections and by the engagement of the bolt with the casing in the advanced position of said bolt said projection engaging the bolt in both the advanced and retracted positions of the bolt.
Claim 2
Dependent Claim
178 words
A lock having a casing and a cover, a bolt mounted for sliding movement in said casing, said bolt having a pair of flanges thereon, said casing having a bolt receiving opening in one end thereof, said opening being completely surrounded by the material of the casing, said bolt being slidable between an advanced and retracted position relative to said casing, said bolt extending through said opening in said advanced position; and means on said cover for engaging the bolt to prevent removal of said cover when said bolt is in said advanced position comprising a pair of projections mounted on said cover and extending into said casing, said projections each being L-shaped, each of said flanges resting in a different one of said L-shaped projections at least when said bolt is in the advanced position, said cover being locked to said casing by the projections and by the engagement of the bolt with the casing in the advanced position of said bolt said projection engaging the bolt in both the advanced and retracted positions of the bolt.
References Cited (Backward Citations)
US1496894A
Cited
US3154938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |