Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 3, 2009
Patent Application Number
11468303
Date Filed
August 30, 2006
Patent Primary Examiner
Patent abstract
A lifter is disclosed using two transmission mechanisms at two sides of a housing for lifting, for example, a bed or chair, each transmission mechanism including a motor. a worm gear wheel meshed with a worm shaft as the output of the motor, a screw rod threaded into an inner thread in the hollow gear shaft of the worm gear wheel, a push block fixedly fastened to one end of the screw rod and moved with the screw rod to lift/lower the load upon rotation of the motor, and a sliding block fixedly fastened to the other end of the screw rod to guide axial displacement of the screw rod in the housing.
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