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US 2003/0116012 A1Published application
Welded hydraulic cylinder for work vehicles
AssigneeCase Corporation
InventorRoger D. Mickelson
Life of this patent
Estimating the term…
Abstract
A welded cylinder is provided wherein a seal (such as an O-ring seal or a cured anaerobic sealant) is disposed between the tube of a cylinder and its welded end plug. The seal is spaced away from the circumferential weld that joins the end plug to the cylinder to reduce the hoop stress in the tube adjacent the weld, thereby reducing the tensile stress at the weld joint.
Claims14
A hydraulic cylinder for use in a work vehicle, comprising:
- (a) a cylinder portion, including:
- a circular cylindrical tube having a first end, a threaded second end, an inner cylindrical surface with an inner diameter and a tube longitudinal axis,
- a plug having a pilot portion disposed inside the tube and an eye portion extending outside the tube and a plug longitudinal axis,
- a circular weldment extending around the circumference of the plug between the plug portion and the eye portion and coupling the first end of the tube to the plug between the pilot portion and the plug portion, and
- a seal disposed between and sealing against the pilot portion and the inner cylindrical surface of the tube;
- (b) a threaded end plug configured to be engaged with threads on the threaded second end of the tube to enclose and seal the second end of the tube and defining a central longitudinal rod opening;
- and
- (c) a piston assembly including:
- a piston configured to be slidingly supported within the cylindrical tube,and
- a piston rod fixed thereto and extending out of the cylindrical tube through the rod opening.
7 more elements
A hydraulic cylinder for use in a work vehicle, comprising:
- (a) a cylinder portion, including:
- a circular cylindrical tube having a first end, a second end, an inner cylindrical surface with an inner diameter and a tube longitudinal axis,
- a plug having a pilot portion disposed inside the tube and an eye portion extending outside the tube and a plug longitudinal axis,
- a circular weldment extending around the circumference of the plug between the plug portion and the eye portion and coupling the first end of the tube to the plug between the pilot portion and the plug portion, and
- a seal disposed between and sealing against the pilot portion and the inner cylindrical surface of the tube;
- (b) an end plug coupled to the second end of the tube to enclose and seal the second end of the tube and defining a central longitudinal rod opening;
- and
- (c) a piston assembly including:
- a piston configured to be slidingly supported within the cylindrical tube, and
- a piston rod fixed thereto and extending out of the cylindrical tube through the rod opening.
7 more elements
Dependencies are inferred from the claim text.