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Hydraulic actuator

  • US 6,634,862 B2
  • Filed: 09/14/2001
  • Issued: 10/21/2003
  • Est. Priority Date: 09/15/2000
  • Status: Expired due to Fees
First Claim
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1. A seal assembly for use in a hydraulic actuator, the actuator including a cylinder, a piston movably disposed in the cylinder, and a piston rod having first and second ends and an outside diameter, the first end of the piston rod connected to the piston and the second end of the piston rod extending outwardly of an end of the cylinder, the seal assembly comprising:

  • a seal member formed of a material impervious to hydraulic fluid and having an inner edge and an outer peripheral edge, the inner edge of the seal member defining a central opening which is larger than the outside diameter of the rod for receiving the rod, and means for sealing the inner and outer edges of the seal member so that the inner edge of the seal member is radially spaced from the outside diameter of the piston rod and the seal member forms a fluid impervious wall.

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