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US3822051A Expired / Lapsed US ⏱️ 0.0 years remaining

Telescopic support

Assignee: Individual
•
Filing: 1971-08-13
•
Granted: 1974-07-02
•
Expires: 1991-08-13
📄 Original PDF 🌐 Google Patents

Abstract

Abstract A manually operable, adjustable telescopic suspension support in which a second tube is slidable axially in a first tube. The second tube is non-rotatable axially with respect to the first tube and carries fixed means having a threaded aperture which is engaged by a threaded rod of coarse pitch fixed longitudinally in the first tube and selectively releasable to rotate in either direction. The support is axially extended or collapsed by exerting manual force axially on the first tube with releasing clutch means to unlock the rod and exerting force axially on the first tube. The second tube is non-rotatable axially with respect to the first tube and carries fixed means having a longitudinal threaded bore which is engaged by a threaded rod fixed longitudinally in the first tube and rotatable selectively in each direction. The support may be extended or collapsed by turning the rod. The support may also be extended or collapsed by exerting force axially on the first tube with releasable clutch means to lock the rod against turning and thereby lock the support. Three telescopic tubes may be used where the fixed means in the second tube is rotatable about its bore and carries an external thread engagable with an internal threaded third tube slidable axially in the second tube.

Inventors

  • 👤 A Karapita

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 12:32
CPC Classifications
F; F16; F16M; F16M11/00; F16M11/02; F16M11/18; F16B; F16B7/00; F16B7/10; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/2056; F16M11/04; F16M11/043; F16M11/046; F16H2025/2062; F16H2025/2081; F16M2200/00; F16M2200/04; F16M2200/047; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32467; Y10T403/32516

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 132 words
A manually adjustable telescopic suspension support comprising: a first tube; a second tube projecting from one end of the first tube and slidable longitudinally therein, the second tube being nonrotatable axially with respect to the first tube; means fixed in the second tube and having an aperture therein; an axially rotatable rod twisted axially to provide a thread of coarse pitch, the rod being positioned longitudinally in the first tube and engaging the aperture of the fixed means in the second tube, the aperture of the fixed means being contoured in cross-section complementary to said rod to provide a slidable fit for the rod; and a handle and manually operable clutch means mounted on the first tube adjacent the other end thereof and connected with the rod releasably to allow rotation thereof.
Claim 2
Dependent Claim 132 words
A manually adjustable telescopic suspension support comprising: a first tube; a second tube projecting from one end of the first tube and slidable longitudinally therein, the second tube being nonrotatable axially with respect to the first tube; means fixed in the second tube and having an aperture therein; an axially rotatable rod twisted axially to provide a thread of coarse pitch, the rod being positioned longitudinally in the first tube and engaging the aperture of the fixed means in the second tube, the aperture of the fixed means being contoured in cross-section complementary to said rod to provide a slidable fit for the rod; and a handle and manually operable clutch means mounted on the first tube adjacent the other end thereof and connected with the rod releasably to allow rotation thereof.
Claim 3
Dependent Claim 32 words
A telescopic support as claimed in claim 1 including a handle fixed on said other end of the first tube and carrying a manually operable lever adapted to release the clutch means.
Claim 4
Dependent Claim 63 words
A telescopic support as claimed in claim 1 in which the clutch means comprises a housing fixed to the first tube adjacent said other end thereof, the rod passing freely through an aperture in the housing and terminating in a head located therein, friction means in the housing normally urged against the head, and means to release the friction means from the head.
Claim 5
Dependent Claim 50 words
A telescopic support as claimed in claim 3 in which the means to release the friction means comprises a plunger adapted to engage the head frictionally, a compression spring normally urging the plunger against the head, and means operable to move the plunger against the action of the compression spring.
Claim 6
Dependent Claim 37 words
A telescopic support as claimed in claim 4 in which the means operable to move the plunger comprises a lever pivotably mounted intermediate its ends on the plunger and bearing at one end laterally against the housing.
Claim 7
Dependent Claim 21 words
A telescopic support as claimed in claim 1 including a hook swivelly mounted on the free end of the second tube.
Claim 8
Dependent Claim 29 words
A telescopic support as claimed in claim 1 including a collar slidable longitudinally on the first tube and releasably securable thereto, and susPension hooks projecting laterally from the collar.

References Cited (Backward Citations)

GB1054667A Cited
US22365A Cited
US1242110A Cited
US1651940A Cited
US2176536A Cited
US2584015A Cited
US2835520A Cited
US3191904A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-07-01 1977-12-31 1978-07-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-07-01 1981-12-31 1982-07-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-07-01 1985-12-31 1986-07-02 $7700.00 Window Closed / Lapsed

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