Patent ID: 6298968
Filing Date: 2001-10-09
Classification: B60T,F16D

Abstract:
An emitter (1) for a hydraulic control system, adapted to be controlled by a control member (4) and comprising a hydraulic chamber (9), in which the piston (8) is mounted for sliding movement sealed by a seal (18) and defining therein a variable volume pressure chamber (44) connected to a hydraulic pipe (3), a reserve space (45) is adapted to contain hydraulic fluid up to a level (15) which is sufficient for the seal (18) to be immersed therein and to constitute the volumetric compensation reservoir (6) of the hydraulic circuit, a transmitting means (16, 26, 27) for transmitting movement of the control member (4) to the piston (8), wherein the hydraulic chamber (9) and the reserve space (45) are formed in a common casing (14), the reserve space (45) being coupled to the pressure chamber (44) through at least one passage (25), a means for preventing return of fluid to the reservoir (6) during pressurization of the pipe (3) and wherein the transmission means (16, 26, 27) includes at least two parts, a first one said two parts (16) is internal to the casing (14) and connected to the piston (8), while a second one of said two parts (26, 27) is external to the casing (14), the two parts (16, 26-27) being coupled together through a member passing through a wall (52, 53) of the casing, wherein the reserve space (45) of the piston (8) is located in the rearward extension of the cylindrical chamber (9) to receive the piston (8) in a rest position in such a way that the hydraulic chamber (9) is extended in a longitudinal axis (B) by the reserve space, and the piston (8) is pivoted on one end of the interior part (16) of the casing (14) of the transmitting means and the seal (18) is disposed in front of the piston (8).