초록 ▼

A device for use in regulating the flow of a working fluid, such as a refrigerant, includes a body defining an axial opening, and a piston received within the axial opening. The piston is moveable in the body and has first and second ends. An actuator, which in one embodiment, is a stepper motor, is

A device for use in regulating the flow of a working fluid, such as a refrigerant, includes a body defining an axial opening, and a piston received within the axial opening. The piston is moveable in the body and has first and second ends. An actuator, which in one embodiment, is a stepper motor, is coupled to the first end of the piston for providing a force to the piston. An inlet and an outlet are coupled to the body such that the input, the output and the body define a passageway for the working fluid. An articulating seat assembly is coupled to the second end of the piston.

대표청구항 ▼

[ What is claimed is:] [1.] A device for use in regulating the flow of a working fluid comprising:a body defining an axial opening;a piston received within the axial opening, the piston being moveable in the body and having first and second ends, the second end having a rounded shoulder tapering to

[ What is claimed is:] [1.] A device for use in regulating the flow of a working fluid comprising:a body defining an axial opening;a piston received within the axial opening, the piston being moveable in the body and having first and second ends, the second end having a rounded shoulder tapering to a generally cylindrical portion that defines a diameter;an actuator coupled to the first end of the piston for providing a force to the piston;an inlet and an outlet coupled to the body such that the inlet, the outlet and the body define a passageway for the working fluid; andan articulating seat assembly coupled to the second end of the piston, the articulating seat assembly including a seat disc and a carrier adapted to receive the seat disc, the carrier defining an inside diameter larger than the cylindrical portion diameter, wherein the carrier surrounds the cylindrical portion and abuts the rounded shoulder in a sealing relationship.