Patent ID: 8132497

Claim:
A hydraulic machine, in particular a hydraulic motor, comprising: a casing ( 2 ) comprising a body ( 3 ) and a cover ( 4 ); a separation means (M) suitable for making an alternating movement in the casing between the body and cover, this separation means defining two chambers ( 5 , 6 ); hydraulic switching means (C) for the supply with liquid and the emptying of the chambers, these switching means comprising a distribution member (D) that is able to take two stable positions and is controlled by the movements of the separation means; a compartment ( 13 ) in the body of the casing connected to a pressurized liquid inlet and in which the switching means (C) are housed, and triggering means ( 15 ), comprising a pushbutton (A) connected to the separation means, suitable for initiating, at the end of travel, a sudden change of the position of the switching means, under the action of an elastic means (E), for the inversion of travel, characterized in that the distribution member (D) comprises a distribution slide valve ( 16 ) pressed against a flat plate ( 17 ) that is fixed relative to the body of the casing, the distribution slide valve ( 16 ) being able to slide sealingly, without a seal, against the plate ( 17 ) which comprises orifices connected respectively to the chambers ( 5 , 6 ) of the casing and to an orifice ( 18 ) for the outlet of the liquid, the distribution slide valve ( 16 ) being provided in order, depending on its position, to close certain of the orifices or place them in communication with the fluid inlet or the exhaust.