Patent ID: 7743716
Filing Date: 2010-06-29
Classification: A47B

Abstract:
1. An elevator unit for a work counter comprising: a right and a left elevator assembly, a drive assembly and a motor, each said right and left elevator assembly including a top frame and a bottom frame with T-slotted vertical side rails, said bottom frame attached to a support surface, said top frame sliding vertically along said bottom frame on rollers received in the T-slots of the vertical side rails of said bottom frame; said drive assembly including a spaced apart drive and driven pulley attached to one of said top frame and said bottom frame of each said right and left elevator assembly, said drive and driven pulley connected by a synchronous drive belt; said synchronous drive belt attached to the other of said top frame and said bottom frame of each said right and left elevator assembly, each said synchronous drive belt including compression springs to allow for misalignments between said right and left elevator assemblies; and a common drive shaft connected to the drive pulley of each of said right and left elevator assemblies; said motor connected to the common drive shaft, whereby the top frames of said right and left elevator assemblies are raised or lowered in unison by rotation of the common drive shaft by the motor.