Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
John David Marsha0
Date of Patent
September 15, 2009
0Patent Application Number
117167500
Date Filed
March 12, 2007
0Patent Citations Received
0
Patent Primary Examiner
Patent abstract
Two parallel planetary gear sets with a common sun gear output are geared to a hydraulic pump and motor system. Input is applied to both planetary gear sets in parallel. Output is from both planetary gear sets in parallel. Two planetary gear set members, one in each set, are geared to the pump and motor and are used to control the ratio of the infinitely variable gear transmission (IVGT). The displacement ratio of the pump and motor, connected to these two members, controls the ratio of the IVGT.
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