Fluid pressure measurement by mechanical compression of tubing

The apparatus for measuring pressure of fluid in fluid-containing, resilient tubing, which comprises:

• (a) first and second opposed members being displaceable from one another a distance effective for receiving fluid-containing, resilient tubing therebetween;
• (b) means for displacing one member relative to the other member under application of a first applied force a distance effective for receiving the fluid-containing, resilient tubing therebetween;
• (c) means for applying a resistance force effective for moving said first and second members towards one another to a predetermined distance therebetween, to compress the fluid-containing, resilient tubing;
• (d) gauge means for indicating fluid pressure in said fluid-containing, resilient tubing as a measure of the force exerted by the fluid-containing, resilient tubing against said members when said members are at said predetermined distance from one another and in absence of said first applied force;
• wherein said gauge means has been pre-calibrated, at said predetermined distance, to correspond to fluid pressure within the fluid-containing, resilient tubing.

An apparatus, comprising:

• (a) a first plate and second plate for compressing a fluid-containing, resilient tube to a predetermined, repeatable distance;
• (b) means for opening a space between said the plates a distance effective to position and align the tube prior to compressing;
• (c) means for moving the plates to said predetermined, repeatable distance;
• and
• (d) means for measuring the force exerted by the tube on said plates;
• wherein said measuring means has been pre-calibrated to correspond to fluid pressure within the tube.