Tilt assembly for a chair
First Claim
1. A tilt assembly for a chair comprising:
- a tilt housing;
a body support member pivotally attached to the tilt housing about a first horizontal axis, said body support member moveable between at least a first position and a second position, wherein the second position is at a greater rearward tilt angle than the first position;
a spring mounted to said tilt housing at a second horizontal axis spaced apart from said first horizontal axis, wherein said second horizontal axis is adjustably moveable relative to said first horizontal axis, said spring biasing said body support member at a first location when said body support member is in said first position and at a second location when said body support member is in said second position, said second location being a greater distance from said first horizontal axis than said first location.
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Accused Products
Abstract
A tilt assembly comprising a tilt housing, a body support member pivotally attached to said tilt housing about a first horizontal axis and a spring mounted to said tilt housing at a second horizontal axis. The body support member is moveable between a first and second position. The second horizontal axis is adjustably moveable relative to the first horizontal axis. The spring biases said body support member at a first location when the body support member is in the first position and at a second location when the body support member is in the second position, with the second location being a greater distance from the first horizontal axis than the first location. A method for supporting a chair body support member is also provided. The method comprises moving the second horizontal axis to a desired position relative to the first horizontal axis, reclining the body support member, and biasing the body support member at first and second locations when the body support member is in the first and second positions respectively.
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Citations
33 Claims
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1. A tilt assembly for a chair comprising:
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a tilt housing;
a body support member pivotally attached to the tilt housing about a first horizontal axis, said body support member moveable between at least a first position and a second position, wherein the second position is at a greater rearward tilt angle than the first position;
a spring mounted to said tilt housing at a second horizontal axis spaced apart from said first horizontal axis, wherein said second horizontal axis is adjustably moveable relative to said first horizontal axis, said spring biasing said body support member at a first location when said body support member is in said first position and at a second location when said body support member is in said second position, said second location being a greater distance from said first horizontal axis than said first location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A tilt assembly for a chair comprising:
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a tilt housing;
a back support pivotally attached to the tilt housing about a first horizontal axis, said back support moveable between at least a first position and a second position wherein the second position is at a greater rearward tilt angle than the first position;
a power pack moveably mounted to said tilt housing, said power pack adjustably moveable relative to said tilt housing, said power pack comprising a spring having a portion biasing said back support at a first location when said back support is in said first position and at a second location when said back support is in said second position, said second location being a greater distance from said first horizontal axis than said first location, wherein said power pack and an entirety of said spring are translatably moveable relative to said tilt housing between at least a first and second position. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method for supporting a chair body support member, said method comprising:
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providing a tilt assembly comprising a tilt housing, said body support member pivotally attached to the tilt housing about a first horizontal axis, said body support member moveable between at least a first position and a second position, wherein said second position is at a greater rearward tilt angle than said first position, and a spring mounted to said tilt housing at a second horizontal axis spaced apart from said first horizontal axis;
moving said second horizontal axis to a desired position spaced relative to said first horizontal axis;
reclining said body support member from said first position to said second position;
biasing said body support member with said spring at a first location when said body support member is in said first position and when said second horizontal axis is at said desired position; and
biasing said body support member with said spring at a second location when said body support member is in said second position and when second horizontal axis is at said desired position, wherein said second location is a greater distance from said first horizontal axis than said first location. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for adjusting the biasing force supporting a chair body support member, said method comprising:
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providing a tilt assembly comprising a tilt housing, a body support member pivotally attached to the tilt housing about a first horizontal axis, said body support member moveable between at least a first position and a second position, and a power pack comprising a housing moveably mounted to said tilt housing and a spring mounted to said power pack housing, said spring biasing said body support member at a first location spaced from said first horizontal axis when said body support member is in said first position, and thereby applying a moment to said body support member about said first horizontal axis; and
moving said power pack relative to said tilt housing and thereby moving said first location relative to said first horizontal axis, wherein said moment applied by said spring to said body support member is adjusted. - View Dependent Claims (32, 33)
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Specification