Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 29, 2007
Patent Application Number
11075732
Date Filed
March 10, 2005
Patent Primary Examiner
Patent abstract
An elevator is described, comprising a first series connected pulley set installed in a fixing frame, a carriage located below the first series connected pulley set, a second series connected pulley set installed on the top of the carriage, a rotary wheel installed in the carriage and a steel rope. The steel rope connects the first series connected pulley set, the second series connected pulley set and the rotary wheel, so that the gravity load of one pulley set can belowered to decrease the pulling force of the steel rope to enhance the safety of the elevator.
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