Patent ID: 6345501
Filing Date: 2002-02-12
Classification: F15B

Abstract:
A hydraulic motor arrangement including a hydraulic motor having a rotary output connected to a load, an inlet line connected to an inlet port arranged to receive a driving fluid, and an outlet line connected to an outlet port whereby fluid can exhaust from the motor, the arrangement further including a by-pass line interconnecting the inlet and the outlet ports, a first flow restrictor in said inlet line upstream of said inlet port, a second flow restrictor in said outlet line downstream of said outlet port, and a non-return valve located within the by-pass line and arranged to permit fluid flow from the outlet port to the inlet port but substantially to prevent fluid flow in the reverse direction, whereby, should the load operate to assist the rotation of the output of the motor, then the pressure at the outlet port will exceed the pressure at the inlet port, thereby opening said non-return valve and permitting flow through said by-pass line from said outlet port to said inlet port.