Patent ID: 6435048
Filing Date: 2002-08-20
Classification: A47B,F16H,Y10T

Abstract:
A telescopic multiple leg assembly comprising:outer, intermediate and inner telescopically coupled legs; a fixed drive screw extending from one end of said outer leg; a drive collar including a rotatable power nut mounted therein and coupled to said fixed drive screw such that rotation of the power nut moves said drive collar with respect to said outer leg and with respect to said fixed drive screw, said drive collar coupled to said intermediate leg for moving said intermediate leg with movement of said drive collar; a drive motor coupled to said drive collar by a plurality of elongated rods spacing said drive motor axially from said drive collar; a rotatable drive screw coupled to said drive motor for rotation of said rotatable drive screw, said rotatable drive screw having an end including a drive gear coupled to said power nut for rotating said power nut within said drive collar to extend and retract said intermediate leg with respect to said outer leg; and an additional drive collar mounted to an end of said inner leg and including an additional threaded drive nut engaging said rotatable drive screw to extend and retract said inner leg with respect to said intermediate leg such that as said rotatable drive screw is rotated, said inner leg moves with respect to said intermediate leg and said intermediate leg moves with respect to said outer leg.