US3820192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door hinge unit
Assignee: Aisin Corp
•
Filing: 1973-08-21
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Granted: 1974-06-28
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Expires: 1993-08-21
Abstract
Abstract A DOOR HINGE UNIT IS PROVIDED WITH A FIXED LEAF AND A MOVABLE LEAF JOINED BY A HINGE PIN FOR PIVOTAL MOVEMENT RELATIVE TO EACH OTHER. A TORSION BAR HAVING A MAIN STRAIGHT PART AND OPPOSED U-SHAPED BENDS AT EACH END IS ROTATABLY MOUNTED ON ONE OF THE LEAVES ALONG THE MAIN PART OF THE BAR. ONE U-SHAPED BEND IS ANCHORED IN THE SAME LEAF AND A CHECK ARM HAVING TWO SEPARATE OPENINGS IS MOUNTED ON THE OPPOSITE END OF THE BAR AND THE MAIN PART THEREOF. THE CHECK ARM IS PROVIDED WITH CAM PORTIONS WHICH SELECTIVELY ENGAGE A ROLLER DETENT ON THE OTHER LEAF TO HOLD THE DOOR IN A PLURALITY OF POSITIONS.
Inventors
- 👤 R Nakano
- 👤 S Yamazaki
- 👤 S Ogasawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:44
CPC Classifications
E; E05; E05D; E05D11/00; E05D11/10; E05D11/1028; E05D11/1042; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/53; E05Y2900/531
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |