US3147830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Releasable hold open device
Assignee: Schlage Lock Co LLC
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Filing: 1958-08-26
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Granted: 1964-09-08
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Expires: 1978-08-26
Abstract
No abstract record available.
Inventors
- 👤 Russell C Flint
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:45
CPC Classifications
A; A62; A62C; A62C2/00; A62C2/06; A62C2/12; E; E05; E05F; E05F3/00; E05F3/22; E05F3/221; E05F1/00; E05F1/002; E05F1/006; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/404; E05Y2201/41; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1819
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
A DOOR HOLDER COMPRISING A FIRST ARM, A FIRST FRICTION HEAD AT ONE END OF SAID FIRST ARM, A SECOND FRICTION HEAD OPPOSED TO SAID FIRST FRICTION HEAD, A SCREW MEMBER FOR MOVING SAID FIRST AND SECOND FRICTION HEADS RELATIVELY TOWARD AND AWAY FROM EACH OTHER FOR FRICTIONAL ENGAGEMENT AND DISENGAGEMENT, A SECOND ARM ROTATABLY MOUNTED ON SAID SECOND FRICTION HEAD, SAID SECOND ARM HAVING AN APERTURE COMMUNICATING WITH SAID SECOND FRICTION HEAD, SAID SECOND FRICTION HEAD HAVING A RECESS ADAPTED TO BE ALIGNED WITH SAID APERTURE, A PIN MEMBER IN SAID APERTURE NORMALLY PROJECTING INTO SAID SECOND FRICTION HEAD RECESS FOR PREVENTING SAID SECOND ARM FROM ROTATING ON SAID SECOND FRICTION HEAD WHILE SAID FIRST AND SECOND ARMS ARE MOVED RELATIVE TO EACH OTHER, A SPRING MEMBER BIASED AGAINST SAID SECOND ARM AND SAID PIN MEMBER FOR EJECTING SAID PIN MEMBER OUT OF SAID SECOND FRICTION HEAD RECESS, AND MEANS INCLUDING A FUSIBLE LINK FOR HOLDING SAID PIN MEMBER IN SAID FRICTION HEAD RECESS IN ORDER TO MAINTAIN NORMALLY A NON-ROTATABLE RELATION BETWEEN SAID SECOND ARM AND SAID SECOND FRICTION HEAD AND TO RELEASE SAID PIN TO PERMIT THE SECOND ARM TO SWIVEL ON SAID SECOND FRICTION HEAD WHEN SAID FUSIBLE LINK IS MELTED.
Claim 2
Dependent Claim
205 words
A DOOR HOLDER COMPRISING A FIRST ARM, A FIRST FRICTION HEAD AT ONE END OF SAID FIRST ARM, A SECOND FRICTION HEAD OPPOSED TO SAID FIRST FRICTION HEAD, A SCREW MEMBER FOR MOVING SAID FIRST AND SECOND FRICTION HEADS RELATIVELY TOWARD AND AWAY FROM EACH OTHER FOR FRICTIONAL ENGAGEMENT AND DISENGAGEMENT, A SECOND ARM ROTATABLY MOUNTED ON SAID SECOND FRICTION HEAD, SAID SECOND ARM HAVING AN APERTURE COMMUNICATING WITH SAID SECOND FRICTION HEAD, SAID SECOND FRICTION HEAD HAVING A RECESS ADAPTED TO BE ALIGNED WITH SAID APERTURE, A PIN MEMBER IN SAID APERTURE NORMALLY PROJECTING INTO SAID SECOND FRICTION HEAD RECESS FOR PREVENTING SAID SECOND ARM FROM ROTATING ON SAID SECOND FRICTION HEAD WHILE SAID FIRST AND SECOND ARMS ARE MOVED RELATIVE TO EACH OTHER, A SPRING MEMBER BIASED AGAINST SAID SECOND ARM AND SAID PIN MEMBER FOR EJECTING SAID PIN MEMBER OUT OF SAID SECOND FRICTION HEAD RECESS, AND MEANS INCLUDING A FUSIBLE LINK FOR HOLDING SAID PIN MEMBER IN SAID FRICTION HEAD RECESS IN ORDER TO MAINTAIN NORMALLY A NON-ROTATABLE RELATION BETWEEN SAID SECOND ARM AND SAID SECOND FRICTION HEAD AND TO RELEASE SAID PIN TO PERMIT THE SECOND ARM TO SWIVEL ON SAID SECOND FRICTION HEAD WHEN SAID FUSIBLE LINK IS MELTED.
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |