Patent CA560682A successfully refreshed from Google Patents.
US3172284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction lock cylinder
Assignee: Yale and Towne Inc
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Filing: 1963-06-18
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Granted: 1965-03-09
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Expires: 1983-06-18
Abstract
No abstract record available.
Inventors
- 👤 Roy L Crandell
- 👤 Richard M Lockman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:04
CPC Classifications
E; E05; E05B; E05B27/00; E05B27/005; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7729; Y10T70/7734
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A LOCK, A KEY PLUG, A SERIES OF TUMBLERS FOR LOCKING SAID KEY PLUG AGAINST RELEASE MOVEMENT, SAID TUMBLERS BEING ADAPTED FOR POSITIONING BY A KEY ENTERING A KEYHOLE IN SAID KEY PLUG TO RELEASE SAID KEY PLUG FOR RELEASE MOVEMENT, A FRANGIBLE MEMBER HOLDING ONE OF SAID TUMBLERS IN RELEASE POSITION WHEREBY SAID KEY PLUG IS RENDERED RELEASABLE BY A KEY CONSTRUCTED TO POSITION ONLY THE REMAINING TUMBLERS, AND SAID FRANGIBLE MEMBER BEING ACCESSIBLE FOR DESTRUCTION WHEREBY TO RELEASE SAID ONE OF SAID TUMBLERS SO THAT SAID ONE OF SAID TUMBLERS TOGETHER WITH SAID REMAINING TUMBLERS MUST THEREAFTER BE POSITIONED BY A KEY IN ORDER TO RELEASE SAID KEY PLUG FOR RELEASE MOVEMENT.
Claim 2
Dependent Claim
115 words
IN A LOCK, A KEY PLUG, A SERIES OF TUMBLERS FOR LOCKING SAID KEY PLUG AGAINST RELEASE MOVEMENT, SAID TUMBLERS BEING ADAPTED FOR POSITIONING BY A KEY ENTERING A KEYHOLE IN SAID KEY PLUG TO RELEASE SAID KEY PLUG FOR RELEASE MOVEMENT, A FRANGIBLE MEMBER HOLDING ONE OF SAID TUMBLERS IN RELEASE POSITION WHEREBY SAID KEY PLUG IS RENDERED RELEASABLE BY A KEY CONSTRUCTED TO POSITION ONLY THE REMAINING TUMBLERS, AND SAID FRANGIBLE MEMBER BEING ACCESSIBLE FOR DESTRUCTION WHEREBY TO RELEASE SAID ONE OF SAID TUMBLERS SO THAT SAID ONE OF SAID TUMBLERS TOGETHER WITH SAID REMAINING TUMBLERS MUST THEREAFTER BE POSITIONED BY A KEY IN ORDER TO RELEASE SAID KEY PLUG FOR RELEASE MOVEMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |