Chair
First Claim
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1. A chair comprising:
- a housing;
a back support pivotally connected to said housing about a first horizontal axis, said back support pivotable between an upright tilt position and a rearward tilt position;
a seat support directly pivotally connected to said back support about a third horizontal axis, and pivotally connected to said housing about a second horizontal axis, wherein said second horizontal axis is moveable toward said first horizontal axis as said back support is pivotable between said upright tilt position and said rearward tilt position;
at least one leaf spring extending longitudinally within said housing and comprising a first end engaging said housing and a second end biasing said back support and said seat support in an upward direction; and
a fulcrum member moveably supported by said housing and engaging said at least one leaf spring between said first and second ends.
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Abstract
A tiltable chair including a housing, a back support pivotally attached to the housing about a first horizontal axis and a seat support pivotally attached to the housing about a second horizontal axis. A leaf spring includes a first end engaging the housing and a second end biasing the back support and seat support in an upward direction. A fulcrum member is moveably supported in the housing and engages a bottom surface of the spring intermediate the first and second ends of the spring.
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Citations
20 Claims
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1. A chair comprising:
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a housing; a back support pivotally connected to said housing about a first horizontal axis, said back support pivotable between an upright tilt position and a rearward tilt position; a seat support directly pivotally connected to said back support about a third horizontal axis, and pivotally connected to said housing about a second horizontal axis, wherein said second horizontal axis is moveable toward said first horizontal axis as said back support is pivotable between said upright tilt position and said rearward tilt position; at least one leaf spring extending longitudinally within said housing and comprising a first end engaging said housing and a second end biasing said back support and said seat support in an upward direction; and a fulcrum member moveably supported by said housing and engaging said at least one leaf spring between said first and second ends. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A chair comprising:
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a housing; a back support pivotally connected to said housing about a first horizontal axis, said back support pivotable between an upright tilt position and a rearward tilt position; a seat support directly pivotally connected to said back support about a third horizontal axis, and pivotally and translatably connected to said housing about a second horizontal axis; at least one leaf spring extending longitudinally within said housing and comprising a first end coupled to said housing and a second end biasing said back support and said seat support in an upward direction; and a fulcrum member moveably supported by said housing and engaging said at least one leaf spring between said first and second ends. - View Dependent Claims (18, 19, 20)
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Specification