Patent US3560033A successfully refreshed from Google Patents.
US3560033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescopic positive lock strut
Assignee: Individual
•
Filing: 1969-02-25
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Granted: 1971-02-02
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Expires: 1989-02-25
Abstract
Abstract THE STRUT IS ADAPTABLE TO CHAIRS, TABLES, STANDS FOR MICROPHONES, LAMPS AND THE LIKE, AND MANY OTHER USES FOR WHICH TELESCOPIC STRUTS ARE REQUIRED. A FULLY ENCLOSED WEDGE AND BALL TYPE MECHANISM PROVIDES POSITIVE LOCKING AT ANY OF A LARGE NUMBER OF DIFFERENT POSITIONS, AND MEANS IS INCLUDED TO RETAIN THE STRUT AT ANY SELECTED LOCKED POSITION. A SINGLE RELEASE MECHANISM PERMITS RAPID ADJUSTMENTS AND, IF THE LOCKING MECHANISM IS NOT PROPERLY ENGAGED, APPLICATION OF LOAD ON THE STRUT WILL COMPLETE THE LOCKING ACTION WITHOUT DANGER OF SLIPPAGE.
Inventors
- 👤 Homer A Barkus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:42
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/20; A47C3/28; A47C3/285; A47C3/26; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/32442; Y10T403/32451; Y10T403/32549
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |