Invisible hinge device for doors or the like
Abstract
Abstract THIS DISCLOSURE PROVIDES AN INVISIBLE HINGE DEVICE FOR MOUNTING AT LEAST ONE DOOR LEAF AT AN END FACE OF A FRAME WALL MEMBER. A FIRST HINGE MEMBER IS MOUNTED ON THE DOOR LEAF AND A SECOND HINGE MEMBER IS MOUNTED ON THE FRAME WALL MEMBER. A LEVER MEMBER AND A LINK MEMBER ARE ATTACHED AT EACH END THEREOF TO A RESPECTIVE HINGE MEMBER. THE LEVER MEMBER AND LINK MEMBER ARE PIVOTALLY CONNECTED ABOUT A COMMON PIN MEMBER TO EFFECT A TONGS-LIKE MOVEMENT WITH RESPECT TO EACH OTHER WHEN THE DOOR LEAF IS DEFLECTED FROM A CLOSED POSITION. THE LINK AND LEVER MEMBERS INCLUDE ANGLED END PORTIONS ATTACHED TO THE HINGE MEMBER MOUNTED ON THE DOOR LEAF. THE HINGE DEVICE OF THIS DISCLOSURE IS UNIVERSALLY ADAPTABLE TO ARTICLES HAVING VARIOUS THICKNESSES OF FRAME WALL MEMBERS AND DOOR LEAVES.
Inventors
- 👤 Hellmuth Grunert
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |