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Head end closure for the cylinder of a piston and cylinder assembly

  • US 4,079,925 A
  • Filed: 08/02/1976
  • Issued: 03/21/1978
  • Est. Priority Date: 08/02/1976
  • Status: Expired due to Term
First Claim
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1. In a piston and cylinder assembly having an elongated cylinder with a head end and a rod end, a piston slidable in said cylinder and a rod connected to said piston and projecting out of said cylinder through said rod end, said cylinder being formed by a wall of preselected thickness and having predetermined internal and external diameters, a closure for said head end, said closure comprising a plug disposed within said cylinder adjacent the head end thereof and having integrally formed inner and outer cylindrical portions, the diameter of said inner portion being substantially the same as said internal diameter of the cylinder to fit snugly within the cylinder, said inner portion having an annular groove formed in the periphery thereof, a ring of resilient material seated in said groove and bearing against the inside of said wall to form a seal between said plug and said cylinder, and a plurality of sharp elongated teeth formed around the periphery of said outer portion of said plug and extending generally longitudinally thereof, the outer diameter of said teeth being greater than said internal diameter of said cylinder and smaller than said external diameter thereof whereby said teeth bite into the wall of the cylinder and hold said plug in a fixed position relative to the cylinder.

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