Dead stop device for doors
Abstract
Abstract THE DEAD STOP DEVICE IS DESIGNED FOR A DOOR WHICH ROTATES WITH SPINDLE MEANS AND WHICH IS ADJUSTED TO BE OPERATIVELY ASSOCIATED WITH A DOOR CONTROL DEVICE SUCH AS A DOOR CLOSING MECHANISM WHICH TENDS TO RETURN THE DOOR TO A PRESELECTED POSITION. CRANK MEANS ROTATABLE WITH THE SPINDLE MEANS HAS AT LEAST ONE ABUTMENT SURFACE AND ALSO CONSTITUTES A PART OF THE DOOR CLOSING MECHANISM. THE ABUTMENT SURFACE IS ADAPTED TO ABUT AGAINST STOP MEANS IN ORDER THAT THE MOVEMENT OF TE DOOR MAY BE STOPPED. THE SPINDLE MEANS AND THE STOP MEANS ARE SUPPORTED SUCH THAT THE STOP MEANS MAY BE SELECTIVELY POSITIONED IN ANY ONE OF A PLURALITY OF POSITIONS IN ORDER THAT THE DOOR MAY BE STOPPED IN ITS MOVEMENT AT ANY SELECTED ONE OF A PLURALITY OF POSITIONS.
Inventors
- 👤 William A Czapar
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |