Suspension adjustment mechanism for low suspension seat
First Claim
1. A seat support assembly, comprising:
- a base;
first, second, third, and fourth suspension arms, each mounted at a first end to the base and moveable with respect to the base, and adapted for mounting to a seat at a second end opposite the first end, the arms being moveable with respect to the seat;
a torsion spring having a first end defining a length, a second end defining a length, and a coil extending between and substantially perpendicular to the first and second ends, the coil defining a torsion spring axis;
a first bearing surface abutting the first end of the torsion spring at a first abutment point to define a first moment arm distance from the first abutment point to the torsion spring axis;
a second bearing surface abutting the second end of the torsion spring at a second abutment point to define a second moment arm distance from second abutment point to the torsion spring axis; and
an adjustment mechanism for simultaneously causing relative movement between the torsion spring and the first and second bearing surfaces to simultaneously move the first abutment point along the length of the first end of the torsion spring to change the first moment arm distance and move the second abutment point along the length of the second end of the torsion spring to change the second moment arm distance.
1 Assignment
0 Petitions
Accused Products
Abstract
A seat support assembly includes a base, a plurality of arms each mounted at a first end to the base for movement with respect to the base, and mounted to a seat at a second end opposite the first end for movement with respect to the seat. A torsion spring has a first end defining a length, a second end defining a length, and a coil defining an axis. A first bearing surface abuts the first end of the torsion spring at a first abutment point to define a first moment arm distance. A second bearing surface abuts the second end of the torsion spring at a second abutment point to define a second moment arm distance. An adjustment mechanism simultaneously causes relative movement between the torsion spring and the bearing surfaces to simultaneously change the first moment arm distance and the second moment arm distance.
102 Citations
24 Claims
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1. A seat support assembly, comprising:
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a base; first, second, third, and fourth suspension arms, each mounted at a first end to the base and moveable with respect to the base, and adapted for mounting to a seat at a second end opposite the first end, the arms being moveable with respect to the seat; a torsion spring having a first end defining a length, a second end defining a length, and a coil extending between and substantially perpendicular to the first and second ends, the coil defining a torsion spring axis; a first bearing surface abutting the first end of the torsion spring at a first abutment point to define a first moment arm distance from the first abutment point to the torsion spring axis; a second bearing surface abutting the second end of the torsion spring at a second abutment point to define a second moment arm distance from second abutment point to the torsion spring axis; and an adjustment mechanism for simultaneously causing relative movement between the torsion spring and the first and second bearing surfaces to simultaneously move the first abutment point along the length of the first end of the torsion spring to change the first moment arm distance and move the second abutment point along the length of the second end of the torsion spring to change the second moment arm distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A seat support assembly, comprising:
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a base; a suspension including a plurality of suspension arms, each mounted at a first end to the base and moveable with respect to the base, and adapted for mounting to a seat at a second end opposite the first end, the arms being moveable with respect to the seat; a torsion spring having a first end defining a length, a second end defining a length, and a coil extending between and substantially perpendicular to the first and second ends, the coil defining a torsion spring axis; a first bearing surface abutting the first end of the torsion spring at a first abutment point to define a first moment arm distance from the first abutment point to the torsion spring axis; a second bearing surface abutting the second end of the torsion spring at a second abutment point to define a second moment arm distance from second abutment point to the torsion spring axis; and an adjustment mechanism for simultaneously causing relative movement between the torsion spring and the first and second bearing surfaces to simultaneously move the first abutment point along the length of the first end of the torsion spring to change the first moment arm distance and move the second abutment point along the length of the second end of the torsion spring to change the second moment arm distance. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification