Patent ID: 6568311
Filing Date: 2003-05-27
Classification: F03C

Abstract:
A hydraulic motor for driving a non-synchronized transmission, comprising, a block cylinder (6) which encloses an output shaft (3) and in which high-pressure pistons (7) are guided; a block-cylinder spring (9) which is arranged between the block cylinder (6) and the output shaft (3); and a valve plate (5) which is located opposite the block cylinder (6); the block cylinder (6) exerting a contact pressure on the valve plate (5) on account of the charging pressure of the hydraulic oil in the block cylinder (6) and of the spring force of the block-cylinder spring (9), wherein, when the hydraulic motor (1) is at a standstill, a hydraulic pressure field oriented counter to the contact-pressure force is built up on a surface (13) between the block cylinder (6) and the valve plate (5) via a valve device (12).