Joints and connections – Articulated members – Lockable at fixed position
Patent
1979-03-13
1980-12-09
Rimrodt, Louis
Joints and connections
Articulated members
Lockable at fixed position
74531, F16B 714
Patent
active
042381649
ABSTRACT:
An externally threaded mandrel extends from one end of the inner tube of a pair of telescoping tubes and is staked thereto. A trifurcated collet threads on the mandrel whereby a conical exterior surface on the mandrel cooperates with a conical interior surface of the collet. Longitudinal ridges on the inner surface of the outer tube interlock with longitudinal grooves on the collet preventing relative motion between the outer tube and the collet while permitting longitudinal translation of the outer tube relative to the inner tube. Rotation of the inner tube in one direction advances the mandrel into the collet, with the interacting conical surfaces driving the furcate segments of the collet outward against the inner wall of the outer tube until a tight fit is produced. Friction between the collet and tube wall locks the tubes together. Reverse rotation of the inner tube withdraws the mandrel and releases the outer tube from the grip of the collet segments. The collet is made of a resilient plastic material.
REFERENCES:
patent: 2494878 (1950-01-01), Jensen
patent: 3019042 (1962-01-01), Smith
H & G Industries, Inc.
Rimrodt Louis
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