US3516636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tilt mechanism for chairs and the like
Assignee: Steelcase Inc
•
Filing: 1967-09-20
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Granted: 1970-06-23
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Expires: 1987-09-20
Abstract
Abstract 1,098,809. Seats. M. P. BURKE. Oct. 17, 1966, No. 46227/66. Heading A4J. A seat 12, which is mounted on a tubular column to tilt about a pivot 50, is counterbalanced by the force of a compression spring 52, exerted through a cable 54. The seat is preferably mounted to rotate about the vertical axis of thrust bearing 38, together with sleeve 34, in which spring 52 is adjustably held between blocks 56 and 58. Steel cable 54 extends over pulley 70 and along channel 74 in sleeve 34. Screwthreads 30 are provided so that, on turning the ring 32, the column is extended telescopically to vary the height of the seat.
Inventors
- 👤 Maurice P Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:45
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/02; A47C3/025; A47C3/026; A47C3/20; A47C3/24; A47C7/00; A47C7/36; A47C7/40; A47C7/44; A47C7/443
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2398211A
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US3185430A
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US3206153A
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US3220687A
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US3220688A
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US3352526A
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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) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |