Patent ID: 6748848
Filing Date: 2004-06-15
Classification: F02B,F16J,Y02T,Y10T

Abstract:
A waste gate valve actuator for use with a turbocharger having a flexible and durable thin non-fabric diaphragm substantially uniform in thickness, said actuator comprising:a cover; a bottom can joined at a crimp to said cover to form an interior cavity; a piston located in said interior of said actuator comprising a piston cup located at an upper end and a rod depending downward to a lower end; a spring captured between said piston cup and said bottom can for exerting a biasing force on said piston and said diaphragm; a non-fabric durable and flexible diaphragm of substantially uniform thickness comprised entirely of a thernmoset or thermoplastic fluorocarbon material, with a crimp end for air tight securement within said crimp, a top, and a convoluted side therebetween, wherein the diaphragm divides said interior of said actuator into an upper pressure chamber and a lower chamber at atmosphere with said piston located in said lower chamber; an air inlet for the introduction of a pressurized substance into said pressure chamber whereby the introduction of a sufficient amount of said pressurized substance will exert sufficient pressure on said diaphragm and said piston to overcome the biasing force of said spring and force said piston downward a sufficient distance to actuate the waste gate valve of the turbocharger.