초록 ▼

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 receive

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.

대표청구항 ▼

1. A variable speed transmission comprising:a rotatable input member; a fluid pump operatively engaged with said input member, a fluid in said pump being pumped in response to rotation of said input member; a fluid motor in fluid communication with but not rotatably fixed to said fluid pump, fluid p

1. A variable speed transmission comprising:a rotatable input member; a fluid pump operatively engaged with said input member, a fluid in said pump being pumped in response to rotation of said input member; a fluid motor in fluid communication with but not rotatably fixed to said fluid pump, fluid pumped by said pump being received by said fluid motor, said fluid motor being driven solely by fluid being received from said fluid pump by said fluid motor and having a variable output speed; means for selectively varying the displacement of one of said fluid pump and said fluid motor, whereby said output speed of said fluid motor is varied; a rotatable output member operatively engaged with said fluid motor; and a reversible electric motor having an output shaft, said output shaft having varying angular positions, said output shaft in mechanical engagement with said displacement varying means, the displacement of said one of said fluid pump and said fluid motor being varied in response to changes in said output shaft angular position.