Load compensator for height adjustable table
First Claim
1. A support assembly, the assembly comprising:
- a first elongated member having a length dimension parallel to a substantially vertical extension axis;
a second elongated member supported by the first member for sliding motion along the extension axis between at least an extended position and a retracted position;
a spring that generates a variable spring force that depends at least in part on the degree of spring loading, the spring having first and second ends, wherein the first end of the spring is supported by the second elongated member;
an equalizer assembly including a strand having first and second ends, the first end linked to the second end of the spring and a second end linked to the first member, the force equalizer assembly and spring applying a force between the first and second members tending to drive the elongated members into the extended position wherein the applied force is substantially constant irrespective of the position of the second elongated member with respect to the first elongated member;
a preloader supporting at least a portion of the strand, the preloader applying a preload force via the strand to the spring when the second elongated member is in a fully extended position; and
an adjuster for adjusting the preload force applied by the preloader.
2 Assignments
0 Petitions
Accused Products
Abstract
A force adjustment assembly for use within a telescoping subassembly that includes a first elongated member and a second elongated member that is supported by the first elongated member for sliding motion along an extension axis, the subassembly further including a force equalizer assembly that includes a strand having first and second ends that are supported by the second and first elongated members, respectively, the adjustment assembly comprising a preloader supported by at least one of the first and second elongated members and supporting at least a portion of the strand, the preloader applying a preload force via the strand when the second elongated member is in a fully extended position and an adjuster for adjusting the preload force applied by the preloader.
113 Citations
47 Claims
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1. A support assembly, the assembly comprising:
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a first elongated member having a length dimension parallel to a substantially vertical extension axis; a second elongated member supported by the first member for sliding motion along the extension axis between at least an extended position and a retracted position; a spring that generates a variable spring force that depends at least in part on the degree of spring loading, the spring having first and second ends, wherein the first end of the spring is supported by the second elongated member; an equalizer assembly including a strand having first and second ends, the first end linked to the second end of the spring and a second end linked to the first member, the force equalizer assembly and spring applying a force between the first and second members tending to drive the elongated members into the extended position wherein the applied force is substantially constant irrespective of the position of the second elongated member with respect to the first elongated member; a preloader supporting at least a portion of the strand, the preloader applying a preload force via the strand to the spring when the second elongated member is in a fully extended position; and an adjuster for adjusting the preload force applied by the preloader. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A telescoping support assembly for vertically adjustably supporting a table top to provide adjustable support comprising:
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a first elongated member and a second elongated member that is supported by the first elongated member for sliding motion along an extension axis; a force equalizer assembly that includes a strand having first and second ends that are supported by the second and first elongated members, respectively; a preloader supported by at least one of the first and second elongated members and in contact with at least a portion of the strand, the preloader applying a preload force via the strand when the second elongated member is in a fully extended position; and an adjuster for adjusting the preload force applied by the preloader; wherein the preloader also includes an adjustment pulley, at least a portion of the strand contacting the adjustment pulley, the adjustment pulley supported by the second elongated member so that the position of the pulley with respect to the second elongated member is adjustable to alter the preload force. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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28. A telescoping assembly to provide adjustable support comprising:
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a first elongated member and a second elongated member that is supported by the first elongated member for sliding motion along an extension axis; a force equalizer assembly that includes a strand having first and second ends that are supported by the second and first elongated members, respectively; a preloader supported by at least one of the first and second elongated members and in contact with at least a portion of the strand, the preloader applying a preload force via the strand when the second elongated member is in a fully extended position; and an adjuster for adjusting the preload force applied by the preloader; wherein the preloader also includes an adjustment pulley, at least a portion of the strand contacting the adjustment pulley, the adjustment pulley supported by the second elongated member so that the position of the pulley with respect to the second elongated member is adjustable to alter the preload force; wherein the preloader includes an adjustment assembly including at least a first adjustment member and an adjustment drive, the adjustment pulley supported by the first adjustment member, the first adjustment member supported by the drive and the drive supported by the second elongated member, the drive operable to move the first adjustment member along an adjustment trajectory to modify the relative position of the adjustment pulley to the second elongated member to alter the preload force. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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35. A telescoping support assembly for vertically adjustably supporting a table top to provide adjustable support comprising:
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a first elongated member and a second elongated member that is supported by the first elongated member for sliding motion along an extension axis; a force equalizer assembly that includes a strand having first and second ends that are supported by the second and first elongated members, respectively; a preloader supported by at least one of the first and second elongated members and in contact with at least a portion of the strand, the preloader applying a preload force via the strand when the second elongated member is in a fully extended position; an adjuster for adjusting the preload force applied by the preloader; and a force indicator linked to the preloader, the force indicator indicating the level of preload force applied to the second elongated member via the preloader. - View Dependent Claims (36, 37, 38, 39)
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40. A telescoping assembly comprising:
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a first elongated member and a second elongated member that is supported by the first elongated member for sliding motion along an extension axis; a force equalizer assembly that includes a strand having first and second ends that are supported by the second and first elongated members, respectively; a preloader supported by at least one of the first and second elongated members and supporting at least a portion of the strand, the preloader applying a preload force via the strand when the second elongated member is in a fully extended position; an adjuster for adjusting the preload force applied by the preloader; and a clutch between the adjuster and the preloader for, when the force between the adjuster and the preloader exceeds a threshold level, allowing the adjuster to slip with respect to the preloader. - View Dependent Claims (41, 42, 43, 44)
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45. A telescoping assembly to provide adjustable support comprising:
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a first elongated member and a second elongated member that is supported by the first elongated member for sliding motion along an extension axis; a force equalizer assembly that includes a strand having first and second ends that are supported by the second and first elongated members, respectively; a preloader supported by at least one of the first and second elongated members and in contact with at least a portion of the strand, the preloader applying a preload force via the strand when the second elongated member is in a fully extended position; and an adjuster for adjusting the preload force applied by the preloader; wherein the force equalizer assembly further includes a force generating biaser, the biaser contacting at least a portion of the strand and applying a force thereto and wherein the preloader applies the preload force to the biaser via the strand when the second elongated member is in a fully extended position; and wherein the biaser includes a compression spring.
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46. A telescoping assembly to provide adjustable support comprising:
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a first elongated member and a second elongated member that is supported by the first elongated member for sliding motion along an extension axis; a force equalizer assembly that includes a strand having first and second ends that are supported by the second and first elongated members, respectively; a preloader supported by at least one of the first and second elongated members and in contact with at least a portion of the strand, the preloader applying a preload force via the strand when the second elongated member is in a fully extended position; and an adjuster for adjusting the preload force applied by the preloader; wherein the preloader also includes an adjustment pulley, at least a portion of the strand contacting the adjustment pulley, the adjustment pulley supported by the second elongated member so that the position of the pulley with respect to the second elongated member is adjustable to alter the preload force; wherein a table top is mounted to the second elongated member.
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47. A telescoping assembly to provide adjustable support comprising:
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a first elongated member and a second elongated member that is supported by the first elongated member for sliding motion along an extension axis; a force equalizer assembly that includes a strand having first and second ends that are supported by the second and first elongated members, respectively; a preloader supported by at least one of the first and second elongated members and in contact with at least a portion of the strand, the preloader applying a preload force via the strand when the second elongated member is in a fully extended position; and an adjuster for adjusting the preload force applied by the preloader; wherein the preloader also includes an adjustment pulley, at least a portion of the strand contacting the adjustment pulley, the adjustment pulley supported by the second elongated member so that theposition of the pulley with respect to the second elongated member is adjustable to alter the preload force; wherein a table top is mounted to the second elongated member.
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Specification