Thermostatic control device

Abstract

A transmission thermostat adapted to control the flow of automatic transmission fluid between a transmission and a transmission oil cooler including a temperature-sensitive mechanism. The temperature-sensitive mechanism includes at lease one bimetallic coil.

1 . A transmission thermostat adapted to control the flow of automatic transmission fluid between a transmission and a transmission oil cooler by using a temperature-sensitive mechanism that comprises at least one bimetallic coil. 
     
     
         2 . The transmission thermostat of  claim 1 , wherein the at least one bimetallic coil actuates a plurality of sealing elements that route the oil in a temperature dependent pattern. 
     
     
         3 . The transmission thermostat of  claim 1 , wherein the sealing elements are arranged in a balanced way such that the force created by the oil pressure acting on one sealing element is canceled out by another sealing element, generating a substantially zero net torque that allows the at least bimetallic coil to rule. 
     
     
         4 . The transmission thermostat of  claim 1 , consisting of a housing with a pressurized fluid input port, a fluid output port leading to a fluid cooling device, a return port for the fluid coming back from the fluid cooling device and a return port leading the fluid back to its pressure source. 
     
     
         5 . The thermostat of  claim 4 , wherein where the thermostat contains an internal pressure relief mechanism, such as but not limited to a spring-loaded element, a leaf spring or other flexible element covering an orifice.