US3378878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decelerator and dead stop
Assignee: Schlage Lock Co LLC
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Filing: 1966-03-04
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Granted: 1968-04-23
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Expires: 1986-03-04
Abstract
No abstract record available.
Inventors
- 👤 Russell C Flint
- 👤 Roy L Pollack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:34
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/04; E05F3/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
A DOOR DECELERATOR AND DEAD STOP COMPRISING: A DOOR FRAME MOUNTING MEANS; DOOR MOUNTING MEANS; AN ARTICULATED PAIR OF ELONGATED ARMS EXTENDING BETWEEN SAID DOOR FRAME MOUNTING MEANS AND SAID DOOR MOUNTING MEANS; SAID PAIR OF ARMS HAVING A PRESET MAXIMUM ANGULAR OPENING THEREBETWEEN AT WHICH SAID ARMS BECOME FIXED FROM FURTHER ANGULAR OPENING MOVEMENT THEREBETWEEN, ONE OF SAID ELONGATED ARMS BEING ADAPTED FOR EXTENSION AND RETRACTION IN LENGTH; HYDRAULIC DECELERATOR MEANS IN SAID ONE ARM HYDRAULICALLY RESISTING SAID EXTENSION, SAID HYDRAULIC DECELERATOR MEANS BEING OPERATIVE ONLY AFTER SAID PRESET MAXIMUM ANGULAR OPENING BETWEEN SAID PAIR OF ARMS HAS BEEN REACHED, AND RETAINING MEANS IN SAID ONE ARM NORMALLY HOLDING SAID ARM IN RETRACTION.
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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |