Pickproof cylinder lock
Abstract
Abstract A PICKPROOF CYLINDER LOCK HAS A BOLT MOUNTED FOR SLIDING MOVEMENT IN THE CYLINDER AND A PLURALITY OF SPRINGTENSIONED PINS ASSOCIATED WITH THE BOLT AND NORMALLY BLOCKING MOVEMENT OF THE BOLT SO AS TO MAINTAIN THE LATTER IN A LOCKED POSITION. THE PINS ARE MOVED TO A POSITION IN WHICH THEY UNLOCK THE BOLT WHEN THE PROPER KEY IS INSERTED IN THE LOCK. INSERTION OF THE KEY ALSO TENSIONS AN ACTUATING MEMBER WHICH IS REMOTE FROM THE PINS AND RELEASES THE ACTUATING MEMBER WHEN THE KEY REACHES ITS FULLY INSERTED POSITION, THE RELEASED ACTUATING MEMBER THEREUPON IMPARTING A SHARP, INSTANTANEUOUS ACTUATING STROKE TO THE BOLT TO DRIVE IT TO AN UNLOCKED POSITION OF THE BOLT HAS BEEN UNBLOCKED BY THE PINS.
Inventors
- 👤 Norman Epstein
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |