Patent ID: 6457652
Filing Date: 2002-10-01
Classification: F01P,G05D

Abstract:
A thermostat comprising:a valve body having an inlet opening, an outlet opening and a bypass opening formed on a circumference surface thereof and a fluid channel area communicating said inlet opening with said outlet opening within said valve body, said inlet opening and said outlet opening communicating with a cooling fluid channel, said bypass opening communicating to said cooling fluid channel and a bypass channel within said valve body; a thermo valve provided in said valve body and configured to open and close communication between said inlet opening and said outlet opening and communication between said bypass opening and said bypass channel based on expansion and reduction of a thermal expansion element configured to thermally expand and reduce volume thereof; a spring provided in said valve body and configured to urge said thermal expansion element to be compressed; and a joint cover configured to cover an end portion of said valve body and communicating with said bypass channel, wherein said joint cover has a bypass channel portion communicating with said bypass channel; and wherein said bypass valve is engaged with said bypass channel portion and configured to slide along said bypass channel portion based on the movement of said piston to open and close said communication between said bypass opening and said bypass channel.