Patent US4105346A successfully refreshed from Google Patents.
US4105346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking system for telescoping members
Assignee: Singer Lewak Greenbaum and Goldstein
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Filing: 1977-10-03
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Granted: 1978-08-08
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Expires: 1997-10-03
Abstract
Abstract A locking system which enables a pair of telescoping members to be slidably movable with respect to each other and locked in a pre-determined position. The outer telescoping leg is generally of cylindrically configuration and has an aperture therein. A sleeve, also having an aperture formed therein, is rotatable about the outer surface of the outer leg. A brake lug is positioned in the leg aperture and the sleeve aperture is of tapered thickness about the leg axes. Rotation of the sleeve about the outer leg causes the brake lug to press against the outer surface of the inner leg and prevents the legs from moving along the leg axes.
Inventors
- 👤 Ralph J. Gelinas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:09
CPC Classifications
F; F16; F16B; F16B7/00; F16B7/10; F16B7/14; F16B7/1427; Y; Y10; Y10S; Y10S16/00; Y10S16/39; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/70; Y10T403/7009; Y10T403/7011; Y10T403/7013
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
170 words
A locking sleeve for a pair of telescoping members comprising: an outer telescoping leg of general cylindrical configuration and an inner telescoping leg, at least a portion of said inner leg being located within said outer leg, at least one of said legs being slidably movable with respect to the other leg along the leg axes, said outer telescoping leg having an aperture therein; a sleeve positioned about the outer surface of said outer telescoping leg and rotatable about said outer leg, said sleeve having an aperture formed therein; a brake lug positioned in said apertures and having a tapered thickness about said leg axes, said brake lug tapering from a thickness approximately equal to the thickness of said outer telescoping leg to a thickness greater than said outer telescoping leg, and wherein rotation of said sleeve about said outer leg causes said lug to press against said outer surface of said inner leg and prevents said leg from being movable with respect to each other along the leg axes.
Claim 2
Dependent Claim
170 words
A locking sleeve for a pair of telescoping members comprising: an outer telescoping leg of general cylindrical configuration and an inner telescoping leg, at least a portion of said inner leg being located within said outer leg, at least one of said legs being slidably movable with respect to the other leg along the leg axes, said outer telescoping leg having an aperture therein; a sleeve positioned about the outer surface of said outer telescoping leg and rotatable about said outer leg, said sleeve having an aperture formed therein; a brake lug positioned in said apertures and having a tapered thickness about said leg axes, said brake lug tapering from a thickness approximately equal to the thickness of said outer telescoping leg to a thickness greater than said outer telescoping leg, and wherein rotation of said sleeve about said outer leg causes said lug to press against said outer surface of said inner leg and prevents said leg from being movable with respect to each other along the leg axes.
Claim 3
Dependent Claim
29 words
A locking system in accordance with claim 1 wherein a capping cover is secured over said sleeve aperture for preventing said brake lug from falling out of said apertures.
Claim 4
Dependent Claim
34 words
A locking system in accordance with claim 1 wherein said leg aperture and said sleeve aperture are of approximately identical dimensions and said brake lug forms a tight fit when positioned in said apertures.
Claim 5
Dependent Claim
46 words
A locking system in accordance with claim 3 wherein said brake lug tapers from a minimum thickness approximately equal to the thickness of the outer leg cylinder wall to a maximum thickness of approximately the thickness of the outer telescoping leg wall and said sleeve wall.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-07 | 1982-02-06 | 1982-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-07 | 1986-02-06 | 1986-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-07 | 1990-02-06 | 1990-08-08 | $7700.00 | Window Closed / Lapsed |