Mechanical adjustable column
OwnerLino E. Torneroinventor
Life of this patent
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Abstract
An adjustable support column for chairs, stools, tables or other furniture items in which a support tube telescopically receives a mounting cylinder. The mounting cylinder is seated on a diamond threaded support rod in the support tube by means of one or more drive nuts and a locking nut. A clutch selectively releases the locking nut to permit longitudinal adjustment of the mounting cylinder relative to the support tube. The diamond threaded support rod is connected to a power spring which stores energy as the support rod is rotated in one direction to cause a return of the support rod to its initial position when the locking nut is released.
Claims19
A mechanically adjustable support column comprising:
- (a) a support tube having a mounting cylinder telescopically mounted in an open end thereof in axially adjustable relation thereto;
- (b) a threaded support rod mounted in axially fixed, rotatable relation to said support tube;
- (c) an energy storing spring means connecting one end of said support rod with the end of said support tube opposite said open end, whereby energy is stored in said energy storing spring means responsive to rotation of said support rod;
- and biases said support rod to a first position;
- (d) connecting means mounting said mounting cylinder on said threaded support rod in said axially adjustable relation between a first extended position when said support rod is in said first position and a selected second one of a plurality of partially retracted positions wherein said spring means is in an energy storing position, said connecting means comprising:
- (i) a first threaded drive nut engaging said threaded support rod and movable axially in response to axial movement of said mounting cylinder whereby axial movement of said mounting cylinder from said extended position is translated into rotation of said support rod through said drive nut;
- (ii) a locking means for locking said drive nut at a selected retracted position;
- and
- (e) clutch means operable from outside said mounting cylinder for locking said drive nut in said selected position.
Dependencies are inferred from the claim text.