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US 2003/0115735 A1Published application
Method for manufacturing a welded hydraulic cylinder for reducing hoop stress
AssigneeCase Corporation
InventorRoger D. Mickelson
Life of this patent
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Abstract
A method for manufacturing a welded cylinder is provided wherein a seal (such as an O-ring seal or a cured polymeric 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.
Claims5
A method of manufacturing a hydraulic cylinder for a work vehicle, the cylinder including a cylindrical tube and a plug having a pilot portion and an eye portion, the method comprising the steps of:
- inserting the pilot portion of the plug into a first end of the cylindrical tube;
- forming a circumferential weld between the plug and the first end of the cylindrical tube around the entire circumference of the plug and cylindrical tube to thereby form a hydraulic fluid tight junction between the plug and cylindrical tube;
- and
- inserting a seal into a second end of the cylindrical tube such that it is coaxial with the plug and seals the pilot portion against the cylindrical tube.
1 more element
Dependencies are inferred from the claim text.