Rubber spring assembly for chair control
Abstract
Abstract THE FOLLOWING SPECIFICATION DESCRIBES A CHAIR CONTROL UTILIZING AN ANNULAR RUBBER SPRING BONDED AT ITS EXTERNAL SURFACE TO A SHELL HELD BY THE POST HORN AND BONDED AT ITS INTERNAL SURFACE TO A TUBE, WHICH IS LONGITUDINALLY DISPLACED IN RESPONSE TO RATIONAL MOVEMENT OF THE OCCUPANT SUPPORT MEMBER. A CHAIR CONTROL IS ALSO DESCRIBED IN WHICH FORCES CREATED IN RESPONSE TO PIVOTING MOVEMENT OF THE CHAIR OCCUPANT ARE APPLIED IN A DIRECTION CORRESPONDING TO THE POST AXIS AND ARE RESISTED BY A SPRING ARRANGED ALONG THAT AXIS. A CHAIR CONTROL IS ALSO DISCLOSED FOR ENABLING MOVEMENT OF THE CHAIR BACK INDEPENDENTLY OF THE SEAT BY USE OF AN ANNULAR RUBBER SPRING PLACED UNDER SHEAR STRESS.
Inventors
- 👤 Philip J Williams
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |