Fluid power cylinder construction

Claim 1

In a fluid power cylinder having a tubular body section, metal end caps, an internal piston member, and piston rod means extending from the piston through at least one of the end caps, the improved non-loosening high pressure resistant connection between an end cap and the tubular body section which comprises: a. having an extended width peripheral portion of the cap slipfit into and engaging an end portion of the tubular body section, b. having a deformed and depressed end of the tubular body section bent and deformed down into a flat-bottomed groove in said cap which has a smaller diameter than said engagEd portion for said end cap, c. having a rolled and deformed continuous ring of metal from said external periphery of said end cap overlap said depressed end of the tubular body section to thereby effect a tight longitudinal clamping and fluid seal between the latter and the end cap, and d. further having a press-fit band around the rolled and engaged portions of the end cap and the deformed end of the tubular body section, whereby there is a tight holding of such engagement to withstand higher pressure and torque stresses on the cylinder.