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Medical diagnostic device for applying controlled stress to joints

  • US 5,662,121 A
  • Filed: 03/14/1995
  • Issued: 09/02/1997
  • Est. Priority Date: 03/14/1995
  • Status: Expired due to Fees
First Claim
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1. A medical diagnostic device for applying a desired stress to a knee joint of a patient, comprisinga frame,a restraint at a first end of the frame for immobilizing the patient'"'"'s thigh,a cradle at a second end of the frame for receiving and supporting the patient'"'"'s leg,a pair of reciprocable pistons between the frame and the cradle for supporting the cradle, the pistons being constrained to move within respective cylinders a distance between a first position in which the cradle is proximal to the frame and a second position in which the cradle is remote from the frame, anda source of pressurized fluid connected to the cylinders for controllably moving the pistons from the first position to the second position, the second position being a position of equilibrium between the weight of the patient'"'"'s leg and a force generated by pressure in the cylinders.

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