Tecumseh Products Company

Joseph V Miller

Norman E Jolliff

Richard T Ruebusch

Kevin J Johnson

A variable speed transmission including a rotatable input member, a fluid pump operatively engaged with the input member, a fluid in the pump being pumped in response to rotation of the input member, and a fluid motor in fluid communication with the fluid pump, fluid pumped by the pump being received by the fluid motor, the fluid motor being driven by fluid received by the fluid motor and having a variable output speed. Means are provided for selectively varying the displacement of the fluid pump or the fluid motor, whereby the output speed of the fluid motor is varied. A rotatable output member is operatively engaged with the fluid motor, and a reversible electric motor having an output shaft is provided, the output shaft having varying angular positions. The output shaft is in mechanical engagement with the displacement varying means, and the displacement of the one of the fluid pump and the fluid motor being varied in response to changes in the output shaft angular position.

Electric shifting of a variable speed transmission

A variable speed transmission including a rotatable input member connectable to a drive source, a pump for pumping fluid through a conduit, a gear train including an epicyclic gear train operatively coupled to the input member and the pump, and a rotatable output member selectively operatively connected to either a forward or a reverse drive gear, wherein the output member has a forward drive ratio corresponding with its connection to the forward drive gear and a different, reverse drive ratio corresponding with its connection to the reverse drive gear. The transmission may also include a pressure compensating flow metering device for regulating the pressure of fluid flowing through said conduit.

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Salem, IN, United States of America

Joseph V Miller