Apparatus for heating an engine using a dual position continuous flow valve assembly

Abstract From the Canadian patent

A dual-position continuous flow valve assembly is disclosed, characterized by similarly configured male and female valve members each containing a piston spring biased to a first position. When the valve members are disconnected, the pistons are in their first positions and a single flow path between inlet and outlet openings of the valve members is defined. When the valves are connected by a quick connect/disconnect device, the pistons are axially diplaced to their second positions to define two separate flow paths. One flow path is from the male valve inlet opening to the female valve outlet opening via first corresponding passages defined in the valve chambers by the stem portions of the …