Veronique Pizon, Jean Christian Farcot: Coronary sinus retroperfusion apparatus for the treatment of myocardial ischemia. Young & Thompson, July 17, 1984: US04459977 (225 worldwide citation)

An apparatus for diastolic blood retroperfusion of the coronary sinus in synchronism with the heartbeat rate for the treatment of infarctions. A connecting tube between an artery and the coronary sinus is fitted with a balloon-type catheter. A pulsatile unit mounted on the tube is controlled by an e ...

Sante Camilli: Artificial venous valve. Young & Thompson, October 25, 1994: US05358518 (115 worldwide citation)

An artificial venous valve with unidirectional flow, for insertion into the human venous system, biocompatible with the receiver, comprises a hollow elongated support and a plate carried by and within the hollow elongated support and movable relative to the support between a position to permit flow ...

James N Chronister, James D Phillips, Richard C Gasaway, Ricky E Pineda: Check valve including means to permit selective back flow. Gulf Valve Company, Bush Riddle & Jackson, October 13, 1998: US05819791 (79 worldwide citation)

A preferred embodiment of FIGS. 1-3 includes a check valve (10) with a pair of semicircular check valve members (34, 36) normally permitting fluid flow in one direction and blocking fluid flow in an opposite direction. Semicircular valve member (36) is releasably locked in an open position to permit ...

Wang Jing, Nassef Hany R: Microfluidic check valves. Fluidigm Corporation, Wang Jing, Nassef Hany R, BOUCHER Patrick, April 10, 2008: WO/2008/043046 (77 worldwide citation)

A microfluidic check valve and a method of using the check valve In microfluidic devices includes a check valve comprising two stacked chambers that are separated by a pore-containing membrane. The membrane is composed of an elastomeric material and can be configured in normally open or normally clo ...

J Edward Stachowiak: High pressure reciprocating pump apparatus. Neal J Mosely, November 7, 1989: US04878815 (72 worldwide citation)

A high pressure reciprocating pump has a flange plate or mounting plate secured to the plunger end of a pump drive housing and a suction and discharge manifold is hingedly connected thereto. A stuffing box in bores in the flange plate has a central bore receiving one end of the plunger and forming a ...

Dennis D Elsberry, Richard H Comben: In-line pressure check valve for drug-delivery systems. Medtronic, Curtis D Kinghorn, Harold R Patton, March 10, 1998: US05725017 (66 worldwide citation)

A pressure control valve, fabricated using micromachining techniques, comprises, in one embodiment a substrate having a central orifice therein and having a sealed chamber formed therein, one wall of which being defined by a flexible membrane. An inlet control element is supported by the membrane su ...

Kevin Farley, Daniel M Gudeman: Surgical cannula with ball valve. Crossetta & Associates, March 14, 1995: US05397314 (65 worldwide citation)

This invention relates to a surgical cannula that has a simple ball valve assembly comprising a ball, rotatably mounted on an axle extending between opposing legs of a pivotable yoke, which engages a seat to seal the instrument inlet to the cannula passageway when a trocar instrument is removed and ...

David C Bailey, Carl A Martin: Check valve. Cybor Corporation, Baker & McKenzie, December 15, 1998: US05848605 (62 worldwide citation)

A corrosion resistant check valve having plastic components in the fluid path is provided. The check valve broadly comprises an inlet housing, an outlet housing, a valve poppet, and a spring. The inlet housing has an inlet passageway and the outlet housing has an outlet passageway. The inlet housing ...

Thomas W Hamilton: Membrane pump. Brisebois & Kruger, May 11, 1976: US03955901 (62 worldwide citation)

An air pressure-operated membrane pump for pumping a liquid comprises a housing including a chamber which is divided into liquid and air compartments by a floppy flexible membrane extending across it. The air compartment has an air inlet and outlet connected by a duct to the throat of a venturi to w ...

Elizabeth A Rinehold: Folding leaf valve and method of making. McGhan Medical Corporation, Michael G Petit, June 5, 1990: US04930535 (58 worldwide citation)

A leaf valve folds upon itself to provide positive sealing of a pressurized chamber under a variety of pressure conditions. In particular, the valve stem folds to effectively close the lumen and provide a positive seal even at low differential pressure. A method of making the valve is descirbed.