US3271901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jail door operator
Assignee: Van Dorn Co
•
Filing: 1965-12-29
•
Granted: 1966-09-13
•
Expires: 1985-12-29
Abstract
No abstract record available.
Inventors
- 👤 Charles B Bednar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:02
CPC Classifications
E; E05; E05F; E05F17/00; E05F17/001; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/1967
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN COMBINATION WITH A DOOR WHICH IS MOVABLE BETWEEN OPEN AND CLOSED POSITIONS, A DOORWAY FRAME AT WHICH SAID DOOR IS MOUNTED, AND A FIRST LOCK MECHANISM FOR LOCKING SAID DOOR CLOSED, SAID FIRST LOCK MECHANISM INCLUDING A DROP BOLT WHICH IS MOVABLE DOWNWARD TO LOCK THE DOOR CLOSED, A SECOND LOCK MECHANISM FOR LOCKING THE DOOR CLOSED WHICH IS POSITIONED TO BE INACCESSIBLE FROM BEHIND SAID DOOR, COMMON OPERATING MEANS WHICH IS ACTUATED WHEN THE DOOR IS CLOSED TO OPERATED BOTH LOCK MECHANISMS TO LOCK THE DOOR IN A CLOSED POSITION, AND MEANS COUPLING SAID COMMON OPERATING MEANS TO SAID DROP BOLT FOR DOWNWARD MOVEMENT OF SAID DROP BOLT WHEN SAID COMMON OPERATING MEANS IS ACTUATED BUT INEFFECTIVE TO PREVENT SAID ACTUATION OF SAID COMMON OPERATING MEANS IF SAID DROP BOLT IS HELD UPWARDLY OUT OF LOCKING RELATIONSHIP WITH SAID DOOR, SAID COUPLING MEANS INCLUDING A LINK WHICH IS MOVABLE DOWNWARDLY IS RESPONSE TO ACTUATION OF SAID COMMON OPERATING MEANS, SAID LINK HAVING A POR-
Claim 2
Dependent Claim
166 words
IN COMBINATION WITH A DOOR WHICH IS MOVABLE BETWEEN OPEN AND CLOSED POSITIONS, A DOORWAY FRAME AT WHICH SAID DOOR IS MOUNTED, AND A FIRST LOCK MECHANISM FOR LOCKING SAID DOOR CLOSED, SAID FIRST LOCK MECHANISM INCLUDING A DROP BOLT WHICH IS MOVABLE DOWNWARD TO LOCK THE DOOR CLOSED, A SECOND LOCK MECHANISM FOR LOCKING THE DOOR CLOSED WHICH IS POSITIONED TO BE INACCESSIBLE FROM BEHIND SAID DOOR, COMMON OPERATING MEANS WHICH IS ACTUATED WHEN THE DOOR IS CLOSED TO OPERATED BOTH LOCK MECHANISMS TO LOCK THE DOOR IN A CLOSED POSITION, AND MEANS COUPLING SAID COMMON OPERATING MEANS TO SAID DROP BOLT FOR DOWNWARD MOVEMENT OF SAID DROP BOLT WHEN SAID COMMON OPERATING MEANS IS ACTUATED BUT INEFFECTIVE TO PREVENT SAID ACTUATION OF SAID COMMON OPERATING MEANS IF SAID DROP BOLT IS HELD UPWARDLY OUT OF LOCKING RELATIONSHIP WITH SAID DOOR, SAID COUPLING MEANS INCLUDING A LINK WHICH IS MOVABLE DOWNWARDLY IS RESPONSE TO ACTUATION OF SAID COMMON OPERATING MEANS, SAID LINK HAVING A POR-
References Cited (Backward Citations)
US1090383A
Cited
US1611260A
Cited
US1864347A
Cited
US2072339A
Cited
US2166527A
Cited
US2287422A
Cited
US2287423A
Cited
US2290114A
Cited
US2346424A
Cited
US2359654A
Cited
US2755081A
Cited
US2686577A
Cited
US2899027A
Cited
US3017967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |