CPC A47C 3/04 (2013.01) [A47C 1/12 (2013.01); A47C 3/40 (2013.01); A47C 7/008 (2013.01); A47C 7/62 (2013.01)] | 10 Claims |
1. A stackable chair configured to be mounted upon an identical stackable chair to form a secure arrangement, the stackable chair comprising:
independently extendable legs;
a pivotable seat, wherein the pivotable seat is pivotable independently of extension of the legs;
at least one actuator to control movement of the legs;
a leg extension sensor measuring displacement of the legs relative to the seat; and
a processor configured to determine an absolute displacement of at least one of the legs or seat, wherein the determination of the absolute displacement is based on,
a number of revolutions of a motor moving the at least one of the legs or seat, and
a datum reflecting a relative position of the at least one of the legs or seat.
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