Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Samuel H. Franklin0
Date of Patent
December 25, 2007
0Patent Application Number
107607510
Date Filed
January 20, 2004
0Patent Primary Examiner
Patent abstract
A dampening device for use with elevator cars or similar devices prevents damage to objects or persons within the elevator car upon failure of a drive chain. A hydraulic motor regulates the rate of descent. The dampening motor is monitored constantly using a pressure gauge.
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