×

Pneumatic monitor for indicating strength of contractile muscles

  • US 4,216,783 A
  • Filed: 03/09/1978
  • Issued: 08/12/1980
  • Est. Priority Date: 03/09/1978
  • Status: Expired due to Term
First Claim
Patent Images

1. In a monitor for indicating movement of contractile muscles in the wall of a body cavity including a compressible bulb assembly insertable into the body cavity and a gauge assembly connected to the bulb assembly and responsive to air pressure changes effected in the assemblies by contraction and relaxation of the muscles in the wall of the body cavity, an improved gauge assembly which comprises a barrel having an interior chamber in communication with the interior of the bulb assembly, a balloon having inner and outer surfaces and a mouth connected to the barrel to expose one of said surfaces of the balloon to the air pressure in the barrel chamber, the wall of said balloon being movable into and out of one end of said barrel, means biasing said balloon to a position within said chamber such that upon a predetermined increase in air pressure in said chamber said biasing means is overcome and said balloon begins to move out of said one end of said barrel to thereby indicate the degree of contraction of the contractile muscle.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×