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METHOD FOR ASSEMBLING BODY AND END SECTIONS FOR FLUID POWER CYLINDER

  • US 3,848,325 A
  • Filed: 08/30/1973
  • Issued: 11/19/1974
  • Est. Priority Date: 05/01/1972
  • Status: Expired due to Term
First Claim
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1. In a fluid power cylinder having a tubular body section, metallic end caps, an internal piston member and piston rod means extending through at least one of the end caps, the improved method of providing a non-loosening connection between an end cap and the tubular body section, which comprises the steps of:

  • a. providing an extended width peripheral portion for the end cap sized to fit into an end of the tubular body section, b. forming a continuous peripheral shoulder around said end cap which is of larger diameter than said extended width portion adapted to engage said body section and which will form an abutting stop for the latter when they are assembled, c. further forming a peripheral groove in said cap adjacent said shoulder, with said groove bottom being of lesser diameter than Said extended width portion of the cap and said groove further having a sloping wall portion angled upwardly toward such extended width portion, d. effecting a coupling between the end cap and said tubular body section to a point where the end of the latter abuts said shoulder of said cap and then permanently deforming the end of the tubular body section down into a said groove until such body section conforms to the bottom and sloping wall portion of said groove, e. subsequently rolling and displacing a portion of the shoulder of said cap continuously down over the deformed end portion of the tubular body section in said groove, whereby there is an initial tight peripheral clamping of the end cap to the body section, and f. effecting the pressing of an encircling metal band over the rolled portion of the shoulder and the deformed end portion of the tubular body section which is in said groove, whereby to effect a circumferential locking of cap and body sections together in a high pressure resisting engagement.

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