Patent ID: 7950590
Filing Date: 2011-05-31
Classification: E21B,F16K,H01H

Abstract:
1. Apparatus actuated in response to temperature comprising: a power source operative to provide magnetic lines of flux; an actuator member; and an intermediate member; wherein, a first potential pathway for the magnetic lines of flux traverses the actuator member and a second potential pathway for the magnetic lines of flux traverses the intermediate member, and wherein magnetic permeability of the intermediate member at a first temperature is less than at a second temperature, the intermediate member positioned relative to the actuator member such that total magnetic flux directed to the actuator member is dependent upon magnetic permeability of the intermediate member, and thus magnetic attractive force which causes the actuator member to move in a first direction is a function of temperature; and a sealing member disposed on the actuator member, and a housing having an inlet port and an outlet port such that the sealing member, when seated against a port, prevents fluid flow through the housing, thereby providing a 2-way valve.