Patent US3281992A successfully refreshed from Google Patents.
US3281992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheel support for doors
Assignee: King Seeley Thermos Co
•
Filing: 1964-05-15
•
Granted: 1966-11-01
•
Expires: 1984-05-15
Abstract
No abstract record available.
Inventors
- 👤 John F Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:24
CPC Classifications
E; E05; E05F; E05F7/00; E05F7/06; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
STRUCTURE FOR SUPPORTING A DOOR FOR SWINGING MOVEMENT ABOUT A VERTICAL AXIS OVER A SUBJACENT SURFACE, COMPRISING: MEANS DEFINING A DOOR HAVING A BOTTOM AND A FREE EDGE PORTION SPACED FROM SAID AXIS; A WHEEL; AND MEANS ROTATABLY MOUNTING THE WHEEL ON SAID DOOR AT SAID FREE EDGE PORTION TO EXTEND BELOW SAID BOTTOM FOR ENGAGING THE SUBJACENT SURFACE TO SUPPORT THE DOOR THEREON, SAID MOUNTING MEANS INCLUDING A TORSION SPRING HAVING AN ELONGATED TORSION PORTION EXTENDING IN THE DIRECTION OF THE WIDTH OF SAID DOOR FOR YIELDABLY ADJUSTING THE POSITION OF THE WHEEL FOR MAINTAINED ENGAGEMENT WITH THE SUBJACENT SURFACE DURING SWINGING MOVEMENT OF THE DOOR THEREOVER, AND MEANS ON SAID DOOR FOR RETAINING SAID ELONGATED SPRING PORTION AGAINST TRANSVERSE DISPLACEMENT, MEANS AT ONE END OF THE SPRING AT SAID FREE EDGE PORTION OF THE DOOR FOR MOUNTING SAID WHEEL FOR ROTATION ABOUT AN AXIS PARALLEL TO THE ELONGATE AXIS OF THE ELONGATED SPRING PORTION, AND MEANS AT THE OTHER END OF THE SPRING FOR LOCKING SAID OTHER END AGAINST ROTATION ABOUT SAID AXIS ONLY IN THE DIRECTION OF ROTATION OF THE WHEEL ABOUT SAID AXIS IN MOVING UPWARDLY RELATIVE TO SAID DOOR BOTTOM.
Claim 2
Dependent Claim
195 words
STRUCTURE FOR SUPPORTING A DOOR FOR SWINGING MOVEMENT ABOUT A VERTICAL AXIS OVER A SUBJACENT SURFACE, COMPRISING: MEANS DEFINING A DOOR HAVING A BOTTOM AND A FREE EDGE PORTION SPACED FROM SAID AXIS; A WHEEL; AND MEANS ROTATABLY MOUNTING THE WHEEL ON SAID DOOR AT SAID FREE EDGE PORTION TO EXTEND BELOW SAID BOTTOM FOR ENGAGING THE SUBJACENT SURFACE TO SUPPORT THE DOOR THEREON, SAID MOUNTING MEANS INCLUDING A TORSION SPRING HAVING AN ELONGATED TORSION PORTION EXTENDING IN THE DIRECTION OF THE WIDTH OF SAID DOOR FOR YIELDABLY ADJUSTING THE POSITION OF THE WHEEL FOR MAINTAINED ENGAGEMENT WITH THE SUBJACENT SURFACE DURING SWINGING MOVEMENT OF THE DOOR THEREOVER, AND MEANS ON SAID DOOR FOR RETAINING SAID ELONGATED SPRING PORTION AGAINST TRANSVERSE DISPLACEMENT, MEANS AT ONE END OF THE SPRING AT SAID FREE EDGE PORTION OF THE DOOR FOR MOUNTING SAID WHEEL FOR ROTATION ABOUT AN AXIS PARALLEL TO THE ELONGATE AXIS OF THE ELONGATED SPRING PORTION, AND MEANS AT THE OTHER END OF THE SPRING FOR LOCKING SAID OTHER END AGAINST ROTATION ABOUT SAID AXIS ONLY IN THE DIRECTION OF ROTATION OF THE WHEEL ABOUT SAID AXIS IN MOVING UPWARDLY RELATIVE TO SAID DOOR BOTTOM.
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |