Valve with segmented spring guide assembly
AssigneeHamilton Sunstrand Corporation
InventorRobert DeFelice
Life of this patent
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Abstract
Disclosed is a method of applying a biasing force against a piston in a valve as the piston moves along a piston stroke axis in a first direction and an opposing second direction, the piston having a first axial end that is a distal end of the piston, the method including: moving the piston along a piston stroke axis in the first direction and the opposing second direction, wherein while moving the piston along the piston stroke axis: applying a first biasing force in the second direction against the first axial end of the piston from a first spring, and applying a second biasing force in the second direction against the first spring from a second spring.
Claims11
A piston assembly comprising:
- a piston movable along a piston stroke axis in a first axial direction and an opposing second axial direction, the piston having a first axial end that is a distal end of the piston;
- and
- a segmented spring guide assembly configured to engage the distal end of the piston along the piston stroke axis, the segmented spring guide assembly comprising:
- a first spring guide assembly that extends distally from the piston along the piston stroke axis, the first spring guide assembly including a first spring that is a first coil spring and a first spring guide for guiding the first spring;
- a second spring guide assembly that extends distally from the first spring guide assembly along the piston stroke axis, the second spring guide assembly including a second spring that is a second coil spring and a second spring guide for guiding the second spring;
- and
- wherein the first spring guide assembly and the second spring guide assembly are movably connected to each other along the piston stroke axis to form the segmented guide spring assembly, and
- wherein when the piston travels along the piston stroke axis:
- the first spring engages the piston and the first spring guide, and
- the second spring engages the first spring guide and the second spring guide:
- wherein:
- a connector extends internally between the first spring guide and the second spring guide to movably connect the first spring guide assembly and the second spring guide assembly;
- and
- the connector has a length that enables the first spring guide and the second spring guide to maintain sliding contact while the piston moves along the piston stroke axis.
A method of applying a biasing force against a piston in a piston assembly as the piston moves along a piston stroke axis in a first direction and an opposing second direction, the piston having a first axial end that is a distal end of the piston, the method comprising:
- moving the piston along a piston stroke axis in the first direction and the opposing second direction,
- wherein while moving the piston along the piston stroke axis:
- applying a first biasing force in the second direction against the first axial end of the piston from a first spring, and
- applying a second biasing force in the second direction against the first spring from a second spring;
- wherein:
- the first biasing force is from a first spring of a segmented spring guide assembly in the piston assembly, the second biasing force is from a second spring of a segmented spring guide assembly in the piston assembly, and the first and second spring are disposed along the piston stroke axis,
- the first spring is a first coil spring, and the second spring is a second coil spring having a same length as the first coil spring;
- the first coil spring is guided by a first spring guide of the segmented spring guide assembly, the second coil spring is guided by a second spring guide of the segmented spring guide assembly, the first and second spring guides are disposed along the piston stroke axis and are in sliding contact with each other while the piston moves in the first direction and the second direction;
- the segmented spring guide assembly includes a connector providing the sliding engagement between the first spring guide and the second spring guide;
- and
- the connector is fixedly connected to the first spring guide and slidingly disposed within the second spring guide.
Dependencies are inferred from the claim text.