Hydrostatic transmission for steer by driving vehicles
    6.
    发明授权
    Hydrostatic transmission for steer by driving vehicles 失效
    用于驾驶车辆转向的疏水变速器

    公开(公告)号:US3627070A

    公开(公告)日:1971-12-14

    申请号:US3627070D

    申请日:1970-04-30

    Inventor: COLTEN ROBERT B

    CPC classification number: B62D11/183 B60K17/10

    Abstract: A fluid transmission having a pump and a pair of fluid motors for driving and steering a vehicle. Pump displacement is varied to control speed at low speeds. The displacement of both motors is concurrently varied to control speed at high speeds and direction at all speeds. The displacement of the fluid motors is independently varied for steering. The displacement of the pump and the motors is controlled by a fluid pressure control having a plurality of variable restrictions, two restrictions being varied by the vehicle steering mechanism to provide a torque differential between the motors and two other restrictions being varied by a manual control to control vehicle speed and direction. A directional valve responsive to drive system pressure acts in combination with the steer restrictions for proper steer control during coasting. A second directional valve responsive to the manual control provides forward or reverse steer control.

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