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Load compensator for height adjustable table

  • US 10,051,955 B1
  • Filed: 03/21/2016
  • Issued: 08/21/2018
  • Est. Priority Date: 12/17/2004
  • Status: Active Grant
First Claim
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1. A table assembly comprising:

  • a leg assembly having upper and lower ends, the leg assembly comprising;

    (i) a fixed first member having upper and lower ends, the lower end of the fixed first member forming the lower end of the leg assembly;

    (ii) a movable second member disposed in sliding engagement with the first member along a substantially vertical extension axis between an extended upper position in which the second member is disposed a maximum distance from the first member lower end and a retracted lower position in which the second member is disposed a minimum distance from the first member lower end;

    (iii) a force equalizer assembly including;

    (a) a cam member supported by the movable second member for rotation about an axis within a range of rotation from a first angular orientation corresponding to the upper position to a second angular orientation corresponding to the lower position, the cam member including a constant radius section and a cam section;

    (b) a spring supported by the movable second member;

    (c) at least a first strand operably coupling the spring, the cam member and the fixed first member together so that the spring and cam member together apply a force to the second member tending to drive the second member toward the upper position; and

    (iv) a lock assembly that is separate from the force equalizer assembly, the lock assembly including a housing, a coupler and a locking member, the housing supported by the movable second member for movement with the table top member and forming a cavity, the coupler moving within the cavity along a trajectory other than a trajectory that is parallel to the vertical extension axis as the second member moves between the upper and lower positions, the locking member mounted to the housing and biased toward a surface of the coupler to contact the coupler and prohibit movement of the coupler within the housing; and

    a table top supported by the second member for movement therewith.

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