Locking mechanism for telescoping tubular poles

Details Locking mechanism for telescoping tubular poles Locking mechanism for telescoping tubular poles

1995-04-10

1996-08-27

Knight, Anthony

Joints and connections

Articulated members

Lockable at fixed position

403350, 403374, F16B 714

Patent

active

055494072

ABSTRACT:
A lock for selectively allowing and preventing relative longitudinal displacement of an outer and inner telescoping tube segments. It comprises a tubular cam adapted to plug into and rotate with one end of the inner tube segment. It has associated with it a pair of arcuate cam followers, each with an outer and an inner cylindrical surface where the outer cylindrical surface can be forced by the action of the tubular cam to frictionally engage the inner surface of the outer telescoping tube segment upon rotation of the inner telescoping tube segment.

REFERENCES:
patent: 1115057 (1914-10-01), Delaney
patent: 2526415 (1950-10-01), Refsdal
patent: 2873129 (1959-02-01), Edmundson
patent: 3419227 (1968-12-01), Werkmeister et al.
patent: 3419293 (1968-12-01), Conrad
patent: 3515418 (1970-06-01), Nielsen
patent: 3596946 (1971-08-01), Burton et al.
patent: 4076437 (1978-02-01), Mazzolla
patent: 4419026 (1983-12-01), Leto
patent: 4632597 (1986-12-01), Clausen et al.
patent: 4659125 (1987-04-01), Chuan
patent: 5011319 (1991-04-01), Levi et al.
Cross Sectional views of pole locking device sold by applicants prior to Apr. 10, 1994.

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