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US 4,711,491 AGranted
Swivel tilt mechanism for chair
OwnerJonathan Ginatinventor
Life of this patent
Estimating the term…
Abstract
A chair includes a base, a member attached to the base and a seat support pivotable with respect to the member along a generally horizontal axis. The pivoting axis is disposed in parallel with and adjacent to a front edge of the seat. A backrest is hingedly connected to the seat. The seat has extreme forward and back tilt positions which may be selected in accordance with the task that is to be performed.
Claims5
A chair comprising:
- a base;
- a member mounted on said base;
- a seat support pivotably attached to said member;
- spring means for urging said seat support towards a rest position with respect to said member;
- and
- tilting means for changing said rest position, wherein said tilting means comprises a flat member with variable thickness disposed between said member and said seat support, said flat member being shiftable to change the distance between said member and said seat support.
3 more elements
A chair comprising:
- a base;
- a member mounted on said base;
- a seat support pivotably attached to said member;
- spring means for moving said seat support towards a rest position with respect to said member;
- and
- a tilting lever which abuts a front position of said seat support and is movable such that the distance between said member and said seat support is changed whereby the height of said front position of said seat is also changed.
3 more elements
Dependencies are inferred from the claim text.