Automotive Products France, Sa

Yannick Frank Theophile Emile Christiaens

Patrick Desbois

Loic Jean Bernard Bouyer

A hydraulic cylinder has a piston ( ) with a seal ( ) in sealed sliding contact within a bore ( ) to define a working chamber ( ) ahead of the piston for the discharge of pressurised fluid from the bore via an outlet ( ) when the piston is undertaking working stroke, an inlet ( ) is provided into the bore from an associated reservoir to allow connection between the reservoir and the working chamber when the piston is in a fully retracted state for recuperation of fluid from the reservoir to the working chamber. The connection between the reservoir and working chamber is provided via a sleeve ( ) in the bore ( ) winch includes axially extending grooves ( ), the grooves being closed by the piston seal ( ) during a working stroke of the cylinder but the ends ( ) of the grooves being open when the piston ( ) is in a fully retracted condition within the sleeve thus by-passing the piston sleeve to connect the working chamber and reservoir. The sleeve ( ) may also have a secondary function of providing an abutment ( ) for a return spring ( ) which returns the piston to its fully retracted position when an operating pedal ( ) associated with the piston ( ) is released.

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Chanteau, France

Yannick Frank Theophile Emile Christiaens