Fluid pressure measuring or testing system and bleed regulator valve therefor
AssigneeSybron Corporation
InventorDonald H. Peeler
Life of this patent
Estimating the term…
Abstract
A sphygmomanometric system having a cuff, etc., and regulator valve for bleeding air out of the sphygmomanometer cuff so that the cuff pressure drops at a substantially constant rate. The valve is in the form of a closed rubber tube having a slit with a pin holding the slit slightly open. Air can therefore be freely pumped into the tube, out the slit and into the cuff, but cannot flow back except at a restricted rate.
Claims22
A sphygmomanometer system comprising fluid-containing means for applying a measured fluid pressure to a cardiovascular system for measuring pressures arising in said cardiovascular system, means for measuring pressures arising in said cardiovascular system, said sphygmomanometer system also including a regulator valve connected to said fluid-containing means for bleeding fluid from said fluid-containing means for decreasing said measured fluid pressure at a predetermined rate;
- said regulator valve including a tube having a flexible wall, said tube being open at both ends, and having the opening at one said end formed with a slit having surfaces which sealingly contact each other when the pressure within said tube and the pressure without said tube are substantially the same;
- said regulator valve also including a pin means in said tube for separating said surfaces somewhat, said pin means including a pin projecting into said slit, said tube being connected to said fluid-containing means, such as to expose the exterior of said tube to said measured fluid pressure, and its interior to a second fluid pressure lesser than said measured fluid pressure, whereby the said measured fluid pressure maintains said slit closed save for said pin.
A regulator valve for bleeding fluid from fluid-containing means for decreasing fluid pressure therein at a predetermined rate:
- said regulator valve including a rubber tube, said tube being open at both ends, and having the opening at one said end formed with a slit having surfaces which sealingly contact each other when the pressure within said tube and the pressure without said tube are substantially the same;
- said regulator valve also including a pin means in said tube for separating said surfaces somewhat, said tube being adapted to be connected to said fluid-containing means such as to expose the exterior of said tube to said fluid pressure, and being adapted to have its interior connected to a second fluid pressure less than the first said fluid pressure, whereby said first said fluid pressure maintains said slit closed save for said pin;
- said pin means having a pin projecting into said slit but said pin means otherwise being totally contained within and supported on said one said end of said tube.
Dependencies are inferred from the claim text.