with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem

Full Title

Valve-gear or valve arrangements actuated non-mechanically > by fluid means, e.g. hydraulic > in which the action of a cam is being transmitted to a valve by a liquid column > with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem

Child Classifications

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• F01L 9/14 the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve