Articulable column

Details Articulable column Articulable column

1989-10-17

1990-08-21

Purol, David M.

Supports

Brackets

Adjustable

248160, 403 55, 403 56, E04G 300

Patent

active

049499270

ABSTRACT:
Presented is a method and apparatus for incrementally varying the frictional forces along an articulable column having succesive joints formed of alternate ball and socket members. Friction is varied by varying the contact angle between said ball and socket members along the length of the column and by supplying a compressive force to said joints via a tensioned means throughout the column. The effect of varying the frictional forces along the column is to vary the stiffness of individual column joints creating a structural member which can be tailored to the load requirements of a specific application.

REFERENCES:
patent: 599543 (1898-02-01), Whitaker
patent: 870429 (1907-11-01), Grimler
patent: 912308 (1909-02-01), Grimler
patent: 936379 (1909-10-01), Stevens
patent: 1279803 (1918-09-01), Watson
patent: 2510198 (1950-06-01), Tesmer
patent: 3096962 (1963-07-01), Meijs
patent: 3168274 (1965-02-01), Street
patent: 3529797 (1970-09-01), Street
patent: 3584822 (1971-06-01), Oram
patent: 4225258 (1980-09-01), Thompson

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