Chairs and seats – Back movement resiliently opposed in operating position – Adjustable resistance
Patent
1998-10-19
1999-12-21
Nelson, Jr., Milton
Chairs and seats
Back movement resiliently opposed in operating position
Adjustable resistance
2973013, 29734419, 29428, A47C 300, B21D 3903
Patent
active
060039434
ABSTRACT:
A chair includes a seat, a base including a housing, and a reclineable back pivoted to the housing. The chair further includes a pneumatic system having a valve actuateable to adjust a height of the seat with respect to the base, a cam for blocking the degree of tilt of one of-the back and seat, and a spring for supporting the reclineable back. A multi-functional member or "satellite" control is operably mounted to the housing and includes a first spindle translatable for pulling the cable to open and close the valve for adjusting the height of the seat. The first spindle is further rotatable to operate the cam to at least partially immobilize the back. The multifunctional member further includes a second spindle including a threaded portion engaging a nut for adjusting the tension of the spring when the second spindle is rotated. The second spindle is rotatably mounted in the first spindle.
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Jr. Milton Nelson
Steelcase Development Inc.
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