Importance

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Abstract

A machine for converting pressure energy of a fluid into mechanical work comprises a working chamber (27,28) the volume of which is cyclically variable in response to reciprocatory motion of a wall (20) which defines the working chamber; a reciprocatory power member (15,16) which is displaceable by said wall (20) under action of the pressure fluid on the wall during expansion of the working chamber (27,28); an inlet conduit (12) communicating with the working chamber, an outlet circuit (13) communicating with the working chamber, an outlet valve (22) which is closable to prevent fluid flow in the outlet conduit in the direction away from the working chamber, and a driven member (17) operatively connected with the power member. The outlet conduit comprises a gap-like passage which substantially surrounds the working chamber (27,28) and extends along the periphery thereof and which is open or openable to permit fluid flow therethrough from the working chamber substantially without any pressure drop.

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First Claim