Reciprocating piston compressed fluid engine having radial cylinders and triggerable valves

Claim 1

A multiple piston and cylinder type engine driven by a compressed fluid, comprising in combination, a crankshaft, a rotatable plate assembly mounted to rotate the crankshaft, a set of reciprocatable pistons moving in cylinders arranged generally radially about the crankshaft and connected to the rotatable plate by piston rods for rotating it and thereby the crankshaft, a fluid source for supplying fluid under pressure, a set of triggerable valves connected for control of fluid to and from said cylinders, resident in an exhaust position and movable to an intake position admitting said fluid under pressure from said source by a fluid pressure triggering force, rotary distributor means synchronously driven by the crankshaft for coupling fluid pressure from said source to trigger said valves into the intake position in a sequence and timing to convert the fluid source pressure into crankshaft rotation power, a venturi connector in a motive fluid supply line leading to the cylinders thereby to produce temporarily a lower energy mixing region for merging exhaust fluid into the motive fluid flow path at a transit point of substantially equalized pressure and returning the pressure to substantially that of the source fluid for driving said pistons, and a feedback conduit coupled through a check valve to recirculate a part of the exhaust fluids passing through the valves at the pressure of the mixing region into the fluid flow path to supplement the fluid from said source.