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Load compensator for height adjustable table

  • US 9,591,920 B2
  • Filed: 01/08/2015
  • Issued: 03/14/2017
  • Est. Priority Date: 12/17/2004
  • Status: Active Grant
First Claim
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1. A table assembly, the assembly comprising:

  • a leg assembly having upper and lower ends and including;

    a first member having a length dimension parallel to a substantially vertical extension axis; and

    a second member supported by the first member for sliding motion along the extension axis between at least an extended position and a retracted position, the second member forming an internal passageway;

    the table assembly further including a spring that generates a variable spring force, the spring having first and second ends, aligned substantially parallel to the vertical extension axis, located within the internal passage formed by the second member and linked to each of the first and second members; and

    a rotatable cam member supported by the leg assembly and operatively linked with the spring, the cam member and spring applying a force between the first and second members tending to drive the second member into the extended position, the cam member rotating around an axis as the second member moves between the extended and retracted positions, the rate of cam member rotation changing in a non-linear fashion as the second member moves toward the extended position;

    a roller positioned between the first and second members; and

    a table top mounted to the upper end of the leg assembly.

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