Patent US3621689A successfully refreshed from Google Patents.
US3621689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder lock operable with two keys
Assignee: Wartsila Oy AB
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Filing: 1969-05-26
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Granted: 1971-11-23
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Expires: 1989-05-26
Abstract
Abstract A CYLINDER LOCK IS DISCLOSED WITH TURNABLE LOCKING DISKS AND OPERABLE WITH TWO DIFFERENT KEYS. ONE KEY CAN BE USED TO OPERATE THE CLOCKWISE ONLY AND THE OTHER KEY TO OPERATE THE LOCK COUNTERCLOCKWISE ONLY. THE FUNCTION OF THE LOCK IS BASED IN THE PRINCIPLE THAT THE LOCKING DISKS CAN MOVE WITHIN A LIMITED ANGLE WITH RESPECT TO THE CYLINDER OF THE LOCK, THAT IS BETWEEN TWO END POSITIONS, AND THAT THE ONE KEY STARTS IS OPERATION MOVEMENT WITH THE LOCKING DISKS IN ONE END POSITION AND THE OTHER KEY WITH THE LOCKING DISKS IN THE OPPOSITE END POSITION.
Inventors
- 👤 Reino Koskinen
- 👤 Kaarlo Henrik Solitanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:18
CPC Classifications
E; E05; E05B; E05B21/00; E05B21/06; E05B21/066; E05B35/00; E05B35/08; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7588; Y10T70/7627; Y10T70/7633; Y10T70/7729; Y10T70/7734; Y10T70/7915; Y10T70/7932
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |