Joint compensator

  • US 5,850,877 A
  • Filed: 08/23/1996
  • Issued: 12/22/1998
  • Est. Priority Date: 08/23/1996
  • Status: Expired due to Term
First Claim
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1. A joint compensator for compensating for the weight of a first joint and at least one subsequent joint, the first joint to be supported above the at least one subsequent joint, the joint compensator comprisinga body interconnectible between the first joint and a moving apparatus for moving the first joint,the body including supporting apparatus for supporting the first joint above the at least one subsequent joints and for providing support of the first joint as it moves with respect to the at least one subsequent joint, the supporting apparatus compensating for weight of the first joint as it moves, the supporting apparatus comprising a movable piston movably mounted in a hollow cylinder with an amount of gas above the piston and an amount of gas below the piston, the piston connected to a piston rod, part of which projects from the cylinder for interconnection to a joint to be supported by the joint compensator,the support apparatus for alternately supporting the first joint and then the at least one subsequent joint, the support apparatus initially adjustable to compensate for the weight of the first joint so that the support apparatus is also thereby adjusted to compensate for weight of the at least one subsequent joint.

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