Methods and apparatus for mechanically controlling adjustment of a chair

A control mechanism for a chair including a base, a seat, and a back, said control mechanism comprising:

• a mounting bracket;
• a plurality of motor-gear groups comprising at least one first motor-gear group and a second motor-gear group, said first motor-gear group configured to electrically adjust a position of the chair seat with respect to the chair base, said second motor gear-group configured to electrically adjust a position of the chair back with respect to the chair seat;
• and
• at least one control switch coupled to each said motor-gear group for controlling operation of said plurality of motor-gear groups, said control switch further coupled to a limit switch configured to limit an amount of height adjustment of the chair seat with respect to the chair base and a resistance sensing switch configured to control power to said plurality of motor-gear groups, said plurality of motor-gear groups coupled to the chair base with said mounting bracket, said mounting bracket configured to permit adjustments of the chair seat position with respect to the chair base independently of said motor-gear groups.

A method for assembling an adjustable chair including a seat supported by a pedestal base, and a control mechanism including a plurality of motor-gear groups, said method comprising:

• coupling a control mechanism including at least a first motor-gear group to the chair seat to selectively electrically adjust a position of the seat relative to the pedestal base;
• coupling a limit switch to the control mechanism to limit an amount of adjustment movement of the chair seat relative to the pedestal base;
• coupling a resistance sensing switch to the control mechanism to control power to the at least a first motor-gear group;
• and
• coupling a mounting bracket to the control mechanism and to the chair seat, such that the chair seat is mechanically adjustable relative to the pedestal base, and independently of the control mechanism.