The West Company

Dominic J Brignola

Homer J Brown

Ralph G Walters

Caroll S Sutryn

Fred T Pickerell

A single barrel two compartment assembly for medicaments comprising an elongated cylindrical hollow barrel having a normally sealed discharge end, a bypass plunger made of a pliable resilient material having a forward section of a diameter slightly greater than the diameter of the barrel, means defining a seat in the bypass plunger, a plunger rod having a tip engageable in said seat for actuating said bypass plunger axially in said barrel and seal means for sealing the open end of the said barrel remote from said discharge end, said bypass plunger normally dividing said barrel into a first compartment to one side of the bypass plunger for a powder medicament and a diluent compartment on the opposite side of said bypass plunger, actuation of said bypass plunger in one direction creating internal diluent pressure whereby said diluent bypasses the periphery of said plunger to mix with said powder medicament.

Single barrel two-compartment medicament container assembly

A syringe assembly comprising a casing for a medicament or the like having a discharge opening at one end, a diaphragm assembly mounted at said end normally sealing said contents, plunger means movable in said casing and operable upon displacement in one direction to effect increase in pressure in said casing to rupture or displace said diaphragm to permit discharge of the contents of said casing.

Syringe assembly

A transfer device for use in mixing substances in different containers normally closed by a stopper of resilient material having a puncturable diaphragm consisting of a central body portion and a pair of aligned spikes or cannulas projecting from opposite sides of said central body portion. Each of the cannulas terminates in a tip portion remote from the central body portion and there are at least one pair of transfer passages extending through the cannulas, the opening at one tip portion of one of the transfer passages is of smaller cross section than the opening of said transfer passage at the tip of the other cannula. The other transfer passage is the reverse of the first transfer passage; that is, the cross sectional relationships of the openings at the tips are the opposite of the first transfer passage. Thus in use the cannulas are inserted through the stopper in a pair of containers to transfer contents, usually fluid, from one container to the other, and the specific arrangement of the transfer passages facilitates smooth flow through the transfer device, one being a fluid passage, the other an air venting passage. The invention also includes the combination of a transfer device, an outer cover member including means for supporting the transfer device therein and a detachable closure member overlying and normally sealing the opening in the outer cover member.

Transfer device for use in mixing a primary solution and a secondary or

A valve assembly comprising a housing having a valve chamber, an inlet at one axial end of the valve chamber and an outlet at the opposite axial end of the valve chamber. A rib surrounds the inlet opening in the chamber. A valve element is mounted in the chamber comprising a generally disc-like body portion having a top face and a bottom face, and a plurality of pedestals depending from the bottom face. The top face of the valve element confronts the rib and the terminal ends of said legs abut the opposite axial end wall of the valve chamber. The axial height of the valve element is slightly greater than the axial depth of the valve chamber between the rib and opposite axial end wall so that a predetermined pressure at the inlet greater than pressure at the outlet is required to open the valve element. The peripheral wall of the valve chamber has at least one flow passage to permit flow from the inlet to the outlet when the valve element is lifted by a predetermined pressure at the inlet.

Pressure responsive one-way valve for medical systems

A primary nurser assembly for mounting over an opening in a container comprising

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Phoenixville, PA, United States of America

Dominic J Brignola