Patent ID: 6431458
Filing Date: 2002-08-13
Classification: G05D

Abstract:
A thermostat valve for controlling gas flow, comprising:a housing having an inlet port, an outlet port, and a central flow path extending between the inlet port and the outlet port; a thermally responsive low temperature snap member positioned within the housing central flow path and moveable with respect to the housing between an open position and a closed position; a first elastomeric seal circumferentially surrounding the flow path through the housing for continuous engagement with the low temperature snap member when in the opened position and the closed position; a restricted flow path in one of the low temperature snap member and the housing for passing gas when the low temperature snap member is in the closed position; a thermally responsive high temperature snap member positioned within the housing central flow path and moveable with respect to the housing between an open and a closed position; and a second elastomeric seal circumferentially surrounding the flow path through the housing for closing off flow through the valve when the high temperature snap member is in the closed position.