Poclain Hydraulics Industrie

Bertrand Bonnomet

Stéphane Vidal

Gilles Grillon

Jeremie Mulot

Laurent Albert

Julien Engrand

Christophe Gouzou

Jérémie Mulot

Maxime Maurer

A hydraulic machine () comprising first and second brake elements (), a spring washer () tending to urge the first and second brake elements () in a braking direction, and a brake release piston () configured to act on the spring washer () in a direction opposing the braking direction, the hydraulic machine being characterized in that the brake release piston () comprises a primary brake release piston () associated with a primary brake release chamber (), and a secondary brake release piston () associated with a secondary brake release chamber (), said primary and secondary chambers () extending radially around the shaft () in such a manner that projections of the primary brake release chamber () and of the secondary brake release chamber () onto a plane perpendicular to a longitudinal axis (X-X) defined by the axis of rotation of the hydraulic machine () are superposed, at least in part.

Braking system for a hydraulic machine

The present invention relates to a system comprising: a shaft having a distal end and a proximal end; a casing defining a housing in which a hydraulic device is rotatably mounted on the shaft; and a sealing element comprising a low pressure dynamic sealing means and a reinforced dynamic sealing means formed by a static seal tightly mounted on a friction pad, such as to isolate the dynamic sealing means from the rotating hydraulic device, said sealing element defining a discharge chamber between the dynamic sealing means and the reinforced dynamic sealing means, which discharge chamber is connected to a drain via a pipe arranged on the surface of the shaft, between the hydraulic device and the shaft, so as to discharge the fluid located in the discharge chamber, such that said discharge chamber is not subjected to the pressure in the casing of the hydraulic device.

Drain for dynamic sealing assembly

The present invention relates to an assembly comprising &#x2014;an axle (), &#x2014;a steering pivot () mounted on the axle (), &#x2014;a wheel spindle () mounted on the pivot (), &#x2014;a hydraulic motor and a wheel mounted on said spindle (), such that the spindle () is pivotally mounted relative to the axle (), the axle (), the spindle () and the pivot () being provided with communicating hydraulic pipes to supply the hydraulic motor with fluid, the hydraulic pipes being arranged in the axle (), the pivot () and the spindle, the pivot () comprising a shaft member fitted in the axle () about which the spindle () is fitted, the axle () and the spindle () each comprising grooves connected respectively to the hydraulic pipes of the axle () and the spindle () in such a way as to form the rotating joint with the hydraulic pipes of the pivot ().

Wheel support provided with pipes for supplying a hydraulic device

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Verberie, France

Bertrand Bonnomet