Rotary hydraulic motor with brake system
AssigneeKinshafer Greiftechnik GmbH
InventorWalter Spindeldreher
Life of this patent
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Abstract
A rotary hydraulic motor which comprises a brake which is adapted to be applied under the pressure of springs and to restrain the output shaft of the hydromotor when the hydromotor is not pressurized and which is arranged to a supply of hydraulic liquid under pressure to the hydraulic motor. In order to ensure that the hydraulic liquid can be withdrawn from the hydraulic cylinder in a simple manner when the motor has stopped so that the brake can subsequently be applied, the piston of the hydraulic cylinder is provided with an orifice plate or a throttle bore through which the hydraulic liquid can enter a chamber of the hydraulic motor.
Claims8
In a rotary hydraulic motor comprising a brake, which is adapted to be applied under the pressure of springs and to restrain an output shaft of a hydraulic motor when the hydraulic motor is not pressurized and which is arranged to be lifted by a hydraulic cylinder in response to a supply of hydraulic liquid under pressure to the hydraulic motor, the improvement wherein a piston of the hydraulic cyclinder is provided with a bore means through which the hydraulic liquid can enter a chamber of the hydraulic motor.
A hydraulic motor according claim 8, wherein the throttle bore opens in an annular end face of the step piston and that annular end face is forced against a seat that is fixed to the housing when the cylinder chamber is pressured.
Dependencies are inferred from the claim text.