Abstract: A waste gate valve actuator is provided for use with a turbocharger having a flexible and durable thin non-fabric diaphragm substantially uniform in thickness. The actuator comprises a cover and a bottom can joined at a crimp to the cover to form an interior cavity. A piston is located in the interior of the actuator comprising a piston cup located at an upper end and a rod depending downward to a lower end. A spring is captured between the piston cup and the bottom can for exerting a biasing force on the piston. Also provided is a non-fabric durable and flexible diaphragm of substantially uniform thickness, with a crimp end for air tight securement within the crimp, a top, and a convoluted side therebetween, wherein the diaphragm divides the interior of the actuator into an upper pressure chamber and a lower chamber at atmosphere with the piston located in the lower chamber.

Abstract: A waste gate valve actuator is provided for use with a turbocharger having a flexible and durable thin non-fabric diaphragm substantially uniform in thickness comprised entirely of a thermoset or thermoplastic fluorocarbon material.

Abstract: A combination valve for relieving pressure and vacuum conditions in a pressurizable tank includes an elongated rod with a spring seat thereon, a body member sealingly securable to the tank, a cover member secured for axial movement with the rod, a spring mounted between the body member and rod so as to yieldably urge the rod and cover member toward the body member, and an O-ring rollably disposed in a groove in the body member. The width of the O-ring is substantially less than the width of the groove such that the O-ring is rollable within the groove between the body member and the cover member. A seal member mounts on the rod and extends between the cavity and the cover member so as to normally sealingly engage the cover member and cover the vent. In a vacuum venting mode, the flexible seal member is suctioned away from the cover member and the vents therein in response to a predetermined vacuum present in the tank. The air can then be drawn into the tank through the vent.