Chair with lumbar support and conforming back
First Claim
Patent Images
1. A chair, comprising:
- a seat support structure;
a backrest frame connected to said seat support structure; and
a backrest formed of a flexible portion having a Shore D hardness of at least 5, and at least two rigid portions spaced apart from one another and embedded within said flexible portion, said backrest frame connected to each of said rigid portions at respective flex joints, said backrest resiliently movable about said flex joints to conform to a seated user.
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Accused Products
Abstract
A task chair including a seat support structure, a backrest frame attached to the seat support structure, and a backrest supported by the backrest frame. The backrest includes a back support surface which may ergonomically conform to a seated user when the user shifts positions while sitting in the chair. The back support surface includes rigid and flexible portions connected to one another, the flexible portions allowing resilient flexing of the back support surface to create conformance zones which dynamically support the back of a seated user in an ergonomic manner.
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Citations
30 Claims
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1. A chair, comprising:
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a seat support structure;
a backrest frame connected to said seat support structure; and
a backrest formed of a flexible portion having a Shore D hardness of at least 5, and at least two rigid portions spaced apart from one another and embedded within said flexible portion, said backrest frame connected to each of said rigid portions at respective flex joints, said backrest resiliently movable about said flex joints to conform to a seated user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A chair, comprising:
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a seat support structure;
a backrest frame connected to said seat support structure; and
a backrest including a flexible body portion having a Shore D hardness of at least 5 and surrounding and extending between at least two rigid portions, said at least two rigid portions pivotally attached to said backrest frame at respective joints which are disposed proximate opposite sides of said backrest. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A chair, comprising:
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a seat support structure;
a backrest frame connected to said seat support structure; and
a backrest including a flexible portion having a Shore D hardness of at least 5, said flexible portion having at least one rigid member embedded therein, said flexible portion and said at least one rigid member together defining a back support surface, said backrest frame connected to said at least one rigid member at at least one flex joint, said backrest resiliently movable about said at least one flex joint to conform to a seated user. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A chair, comprising:
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a seat support structure;
a backrest frame connected to said seat support structure; and
a backrest including a flexible body portion having a Shore D hardness of at least 5 and surrounding and extending between at least two rigid portions, said at least two rigid portions attached to said backrest frame at respective joints, said body portion including an upper portion flexible between a substantially upright position and a reclined position responsive to movement of a seated user. - View Dependent Claims (27, 28, 29, 30)
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Specification