I.C. engine cooling circuit plug - comprises obturator, sealed to circuit neck, with spring loaded valve with lower lip supporting joint where valve is supported, float, closing valve when circuit fluid expands, having hermetic bell supporting flat lip joint

摘要

The plug comprises an obturator sealed by a joint to a circuit tubular neck (1a). A spring loaded valve opposite the obturator is normally supported against a fixed seat (5) and a float (9) engages and closes the valve (8) when the fluid contained by the circuit expands. The obturator is fixed to a cage (3) in which the valve is located. The valve has a lower annular lip (8b) which supports a fixed joint (5) on which the valve is spring supported. The external wall of the valve has two joints (6,7) engaging in the neck bore and located either side a ferrule (1b) which communicate with an expansion chamber. The float, which is guided vertically relative to the central valve ribs, has a hermetic bell (9a) forming the support for a flat joint (10) mating with the valve lip. The joint is assembled onto the float horizontal shoulder (9d).