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1. (WO2019066759) A THERMOSTAT ASSEMBLY WITHOUT DIRECT AND INDIRECT COOLING OF HEAT SENTIVE WAX FILLED BODY AT FULLY CLOSED THERMOSTAT POSITION
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CLAIMS

The present invention relates to a thermostat assembly (30), comprising a body (34), a spring (37), a thermo-actuator (38) assembly, a valve seat (36), and a cover (35), which provides a better bypass control by controlling the coolant flow between the engine channels and the radiator channels in the engine cooling system according to the engine temperature to increase efficiency of internal combustion engines and characterized by;

comprising a valve structure (10) having a ring-shaped groove (11) structure on its top surface and a sealing element (20) to be placed in said groove (11),

to prevent the heat transfer between said heat sensitive wax filled body (38.2) and the relatively cold coolant in the radiator inlet (32) passage at the fully closed thermostat position;

the direct heat transfer is prevented by the sealing element (20) merging with said valve seat (36) and the indirect heat transfer is prevented by producing the valve (20) structure carrying the sealing element (20) with a non-conductive material.

A thermostat assembly (30) according to claim 1 , wherein said sealing element (20) and said valve structure (10) are made of rubber or plastic material to prevent heat transfer between said heat sensitive wax filled body (38.2) and the relatively cold coolant in the radiator inlet (32) passage at the fully closed thermostat position where there is a coolant flow just through the bypass circuit.