Heavy duty cylinder
AssigneeParker-Hannifin Corporation
InventorsBruce E. Kohlmeyer, Stanley Paul Evans, Jr.
Life of this patent
Estimating the term…
Abstract
A cylinder for a piston-cylinder assembly comprises an extruded stainless steel cylinder body and stainless steel end caps mounted to opposite ends of the body. A unique configuration of three seals is used to seal each end cap to the cylinder body.
Claims18
A cylinder for a piston-cylinder assembly, comprising an extruded stainless steel cylinder body, and stainless steel end caps mounted to opposite ends of the body, wherein the body has a lobed cross-sectional shape with the lobes forming thicker wall portions that have formed therein threaded bores opening to respective end faces of the body, the end caps have through bolt holes aligned with the threaded bores at the respective end of the body, and wherein the end caps are secured to the ends of the body by bolts having shanks extending through respective through holes in the respective end caps and threaded end portions threaded into respective threaded bores.
A cylinder for a piston-cylinder assembly, comprising an extruded stainless steel cylinder body, and stainless steel end caps mounted to opposite ends of the body,
- wherein the body has a lobed cross-sectional shape with the lobes forming thicker wall portions that have formed therein threaded bores opening to respective end faces of the body, the end caps have through bolt holes aligned with the threaded bores at the respective end of the body, and wherein the end caps are secured to the ends of the body by bolts having shanks extending through respective through holes in the respective end caps and threaded end portions threaded into respective threaded bores, and
- wherein each bolt has an enlarged head, a sealing washer is sandwiched between the head and an end face of the respective end cap, and the sealing washer has a radially outer metal washer portion and an elastomeric annular center portion deformed into the bolt hole for sealing between the bolt hole and shank of the fastener.
A cylinder for a piston-cylinder assembly, comprising an extruded stainless steel cylinder body, and stainless steel end caps mounted to opposite ends of the body,
- wherein the end cap has a cylindrical pilot portion telescoped into an adjacent end of the body, and
- wherein the end cap has a stepped shoulder onto which an annular seal is piloted, which annular seal is sandwiched between opposed axial surfaces of the end cap and body.
A piston-cylinder assembly comprising a cylinder including an extruded stainless steel cylinder body and stainless steel end caps mounted to opposite ends of the body, and a piston movable in the body between the end caps,
- wherein one of the end caps has a rod bore, and the piston has a piston rod extending therefrom and through the rod bore, and
- wherein each end cap is sealed to a respective end of the cylinder body by a serial arrangement of a first elastomeric seal, a metal-to-metal seal, and a second elastomeric seal.
Dependencies are inferred from the claim text.