US3611474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Invisible hinge
Assignee: Stanley Works
•
Filing: 1969-10-21
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Granted: 1971-10-12
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Expires: 1989-10-21
Abstract
Abstract AN INVISIBLE HINGE FOR DOORS AND THE LIKE INCLUDES A PAIR OF MOUNTING BLOCKS FORMED FROM A LOW-FRICTION MATERIAL SUCH AS NYLON AND JOINED BY A PAIR OF INTERLOCKED LINKS. A PIVOT PIN CONNECTS THE LINKS WHICH ARE EACH PIVOTALLY CONNECTED AT ONE END TO THE MOUNTING BLOCKS. THE OTHER ENDS OF THE LINKS ARE MOUNTED IN SLIDE BEARINGS FORMED IN THE BLOCKS TO ENABLE THE LINKS SIMULTANEOUSLY TO ROTATE WITH RESPECT TO THEIR PIVOT PIN AND THE BLOCK PIVOT PINS, AND TO SLIDE IN THE BLOCKS, SO THAT THE AXIS OF ROTATION OF THE BLOCKS IS NOT FIXED IN SPACE. HENCE THE HINGE IS INVISIBLE UPON CLOSURE OF A DOOR ON WHICH IT IS MOUNTED.
Inventors
- 👤 Walter Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:26
CPC Classifications
E; E05; E05D; E05D3/00; E05D3/06; E05D3/18; E05D3/186; E05Y; E05Y2900/00; E05Y2900/20
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |