Patent US3509749A successfully refreshed from Google Patents.
US3509749A
Expired / Lapsed
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Lock
Assignee: Duncan Industries Inc
•
Filing: 1964-04-13
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Granted: 1970-05-05
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Expires: 1984-04-13
Abstract
No abstract record available.
Inventors
- 👤 John F Regan
- 👤 Edward C Arzig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:24
CPC Classifications
E; E05; E05B; E05B29/00; E05B29/004; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7588; Y10T70/7593; Y10T70/7599; Y10T70/7667; Y10T70/7684; Y10T70/7689; Y10T70/7695; Y10T70/7729; Y10T70/7734; Y10T70/778; Y10T70/7791; Y10T70/7802; Y10T70/7876
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A LOCK COMPRISING A CASING HAVING A CYLINDRICAL BORE FORMED WITH RECESSES THEREIN, A PLURALITY OF PLUGS EACH INDEPENDENTLY ROTATABLY MOUNTED WITHIN SAID CASING BORE FOR ANGULAR DISPLACEMENT TO ANY ONE OF A PLURALITY OF ANGULAR ORIENTATIONS, A TUMBLER SLIDBALY MOUNTED TO EACH OF SAID PLUGS FOR MOVEMENT INTO AND OUT OF LOCKING ENGAGEMENT WITH A RESPECTIVE ONE OF SAID RECESSES AT EACH OF SAID ANGULAR ORIENTATIONS, AND A LUG ON EACH OF SAID TUMBLERS AND ACTUABLE BY A KEY TO MOVE THE TUMBLER OUT OF LOCKING ENGAGEMENT WITH SAID RECESS TO PERMIT ROTATION OF THE RESPECTIVE PLUG, EACH OF SAID LUGS BEING ECCENTRICALLY LOCATED TO ASSUME A DIFFERENT POSITION IN EACH OF SAID ANGULAR ORIENTATIONS OF THE RESPECTIVE PLUG TO CHANGE THE ANGULAR ORIENTATION OF ONE OR MORE OF SAID PLUGS WITH RESPECT TO OTHERS OF SAID PLUGS TO REQUIRE DIFFERENT KEYS FOR THE OPERATION OF THE LOCK.
Claim 2
Dependent Claim
149 words
A LOCK COMPRISING A CASING HAVING A CYLINDRICAL BORE FORMED WITH RECESSES THEREIN, A PLURALITY OF PLUGS EACH INDEPENDENTLY ROTATABLY MOUNTED WITHIN SAID CASING BORE FOR ANGULAR DISPLACEMENT TO ANY ONE OF A PLURALITY OF ANGULAR ORIENTATIONS, A TUMBLER SLIDBALY MOUNTED TO EACH OF SAID PLUGS FOR MOVEMENT INTO AND OUT OF LOCKING ENGAGEMENT WITH A RESPECTIVE ONE OF SAID RECESSES AT EACH OF SAID ANGULAR ORIENTATIONS, AND A LUG ON EACH OF SAID TUMBLERS AND ACTUABLE BY A KEY TO MOVE THE TUMBLER OUT OF LOCKING ENGAGEMENT WITH SAID RECESS TO PERMIT ROTATION OF THE RESPECTIVE PLUG, EACH OF SAID LUGS BEING ECCENTRICALLY LOCATED TO ASSUME A DIFFERENT POSITION IN EACH OF SAID ANGULAR ORIENTATIONS OF THE RESPECTIVE PLUG TO CHANGE THE ANGULAR ORIENTATION OF ONE OR MORE OF SAID PLUGS WITH RESPECT TO OTHERS OF SAID PLUGS TO REQUIRE DIFFERENT KEYS FOR THE OPERATION OF THE LOCK.
References Cited (Backward Citations)
DE564851C
Cited
FR429142A
Cited
FR770941A
Cited
US2039126A
Cited
US2358164A
Cited
US2375682A
Cited
US2766611A
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US3263461A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |