Abstract: A system for sensing fluid conduit occlusion that reacts to occlusion force applied by changing the state of a switch only if a predetermined minimum force has been applied through the conduit. The system includes a contact member arm that cooperates with a force sensitive plunger to engage or separate a pair of contact members in response to application of a minimum force to the plunger. The plunger is positioned within a sensor gap through which the conduit extends.

Abstract: A fluid passage valve selectively opens and closes a fluid passage port defined in a bottom of a chamber which contains a fluid to be transfused into a patient's vein. The fluid passage valve has a valve member movable toward and away from the fluid passage port to open and close the fluid passage port, and a valve member casing which houses the valve member. The valve member casing has a plurality of limbs which are progressively spread outwardly away from each other in a direction toward the bottom of the chamber, so that the valve member will not be caught by the limbs when the valve member is lowered to close the fluid passage port.

Abstract: This invention relates to an intravenous drip, which has a dripping vessel, a cap, a valve, a connecting tube and a pointed bar been inserted in the solution bottle letting the solution in said bottle to flow down through a solution passage of said bar into said dripping vessel, and said valve with a hollow cone to float on the solution level in said dripping vessel and to blow the flow of the solution by means of the circumferential surface of said hollow cone able to touch the upper inside rim of the connecting tube inserted in the said linking tube of the dripping vessel as the solution level therein gradually goes down.

Abstract: An alarm device for dripping injection comprising a floating barrel which vertically moves up or down according to fluid volume in the dripping liquid barrel, a touch switch and sealing means which are provided in the upper area of the lower part of dripping liquid barrel, a socket which is provided in the dripping liquid barrel lower part for connection to touch switch, and a power lead and plug provided by a separate action box or a patient room's call assembly to plug the socket. As the contained fluid is used near empty and the fluid volume in the dripping liquid barrel diminishes meantime, the floating barrel, when loosing support by the fluid volume, moves down and touches the touch switch with its own weight, thereby conducting open the separate action box or the patient room's call assembly to alarm nurses or hospital orderly to come to handle.

Abstract: A flow regulator comprises a float valve body provided in an inner container which in turn is fitted in a lower portion of an outer container. The float body has an elongated slender upper portion which is suddenly restricted at an upper side and an elongated tapered lower portion. The slender upper portion extends through a central opening of a first plate at the top end of the inner container. The tapered lower portion passes through a valve seat of a second plate placed below the first plate and extends beyond a restricted tubular bottom end of the inner container. A flexible tube is sleeved on said tubular bottom end and receives the end of the float body. By moving the flexible tube, the float body can be moved away from the valve seat. A further valve seat may be formed in the tubular bottom end of the inner container.

Abstract: This invention relates to a hydrostatic float valve for use in a fluid feed system that is capable of automatically shutting off the flow of fluid to a body cavity of a patient whenever additional or more rapid flow of said fluid would harm said patient and also relates to a fluid delivery system of the intravenous type that incorporates said hydrostatic float valve.

Abstract: A retrograde coronary sinus perfusion device provides steady state blood flow to the coronary sinus and has a balloon set back from the catheter tip to block the coronary sinus during most of diastole to maximize retrograde perfusion. A global device seals the coronary sinus at the coronary sinus valve.

Abstract: A fluid flow regulator includes a resilient hollow sealing body which is fitted in the bottom part of a liquid housing adjacent to a tubular outlet end and which has a central through-hole to communicate to one another the chamber of the housing and the outlet end. An annular flange which extends from the top of the sealing body toward the through-hole forms a valve seat against which a float valve can be efficiently and tightly seated. A movable tube is inserted in the tubular end to be used to manually release the float valve from the valve seat.

Abstract: A device for reducing the rate of flow from a reservoir as the reservoir empties requires only a single chamber having an input, for receiving fluid from a reservoir, and an output port. There is a provision for sensing fluid level in the chamber, and a separate provision for reducing the flow through the output port when fluid level in the chamber has fallen to a predetermined level. In a preferred embodiment of the invention, fluid level is sensed by a float, which, after falling to a predetermined level, actuates a plunger that reduces flow through an aperature at the bottom of the chamber.