초록 ▼

A compact telescopic leg assembly includes a generally cylindrical drive motor mounted axially within the inner leg and coupled to a drive collar by a pedestal mount. A drive screw is threadably coupled to a first drive collar which is attached to the inner leg to raise and lower as the drive screw

A compact telescopic leg assembly includes a generally cylindrical drive motor mounted axially within the inner leg and coupled to a drive collar by a pedestal mount. A drive screw is threadably coupled to a first drive collar which is attached to the inner leg to raise and lower as the drive screw is rotated by the motor. The pedestal mount couples the motor through the first drive collar to a second drive collar which is coupled to an intermediate leg telescopically receiving the inner leg. Gears couple the motor-driven drive screw to a rotatable power nut coupled to the second drive collar. A fixed drive screw extends from the base within an outer leg upwardly through the second drive collar and cooperates with the power nut within the second drive collar to simultaneously extend and retract the legs as the motor rotates the motor-driven drive screw.

대표청구항 ▼

1. 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 pow

1. 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.