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US 2010/0141002 A1Published application
Biasing mechanism
OwnerAndrew J. Kurrasch, Andrew Squires +1inventors
InventorsANDREW J. KURRASCH, Andrew Squires, John F. Aldrich
Life of this patent
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Abstract
A biasing mechanism between two portions of a chair, such as the seat and back components, where the biasing mechanism can position the back component in an infinite number of recline positions between a first, or fully upright, position and a second, or fully reclined, position, where the biasing mechanism consists of a leaf spring and a cylinder in a parallel configuration.
Claims21
A chair assembly comprising:
- a base;
- a support structure pivotally coupled with the base and configured to pivot between a first position and a second position;
- a fulcrum coupled with the base;
- a leaf spring extending longitudinally within the base and comprising a first end engaging the base and a second end biasing the support structure in an upward direction, the leaf spring being engaged by the fulcrum member between the first and second ends;
- and
- a cylinder extending longitudinally within the base and coupled between the base and the support structure, the cylinder being configured to lock the support structure in at least one position between the first and second positions.
3 more elements
A chair assembly comprising:
- a base;
- a support structure pivotally coupled with the base at a coupling point and configured to pivot between a first position and a second position;
- a retention member coupled with the support structure;
- a fulcrum member coupled with the base;
- a stop member coupled with the base, where the support structure is in contact with the stop member when in the first position;
- a leaf spring extending longitudinally within the base and with a first end engaging the base and a second end disposed below the retention member and biasing the support structure in an upward direction, the leaf spring being engaged by the fulcrum member between the first and second ends;
- and
- a cylinder extending longitudinally within the base and disposed below the leaf spring, the cylinder coupled between the base and the support structure, the cylinder being configured to lock the support structure in at least one position between the first and second positions.
5 more elements
A chair assembly comprising:
- a base;
- a support structure pivotally coupled with the base at a coupling point and configured to pivot between a first position and a second position;
- biasing means for biasing the support structure in an upward direction;
- and
- locking means to lock the support structure in a position between the first position and the second position.
2 more elements
A method of use of a chair assembly, the method comprising:
- providing a base pivotally coupled with a support structure, wherein a leaf spring and cylinder are engaged with the base and support structure, and where the support structure is configured to pivot between a first position and a second position;
- biasing the support structure in an upward direction with the leaf spring and cylinder;
- applying a load to the support structure in a downward direction;
- pivoting the support structure in a downward direction;
- and
- locking the support structure with respect to the base by engaging the cylinder.
3 more elements
A method of assembly for a chair, the method comprising:
- providing a base, a body support having a retention member, and a leaf spring;
- coupling the leaf spring with the base;
- coupling the body support with the base such that the body support is disposed substantially above the base;
- positioning the leaf spring below the retention member;
- rotating the body support to bias the leaf spring to a first position;
- inserting a stop member within the base;
- releasing the body support member;
- and
- allowing the body support member to engage the stop member.
6 more elements
Dependencies are inferred from the claim text.