Retainer valve assembly for syringe

Claim 2

A retainer valve assembly for a syringe comprising: a body portion having means thereon for mounting said valve assembly in the barrel of said syringe intermediate the ends thereof; a reciprocally operating valve member movably mounted on said body portion and normally being seated in a central opening in said body portion to form a seal and isolate one end portion of the syringe from the other end portion and adapted to be unseated by sufficient pressure from either side thereof; said valve member being responsive to a threshold pressure from either end portion of the syringe so as to unseat from said body portion and provide a large enough opening to permit fluid and some solids to flow from one end portion of said syringe to the other end portion thereof, the threshold pressure needed to unseat the valve member being greater than the operating pressure needed to keep the valve open until a desired amount of fluid and solids are transferred and when the operating pressure is relieved the valve member will return to its normal seated position thereby re-forming the seal between the end portions of said syringe and alleviating the danger of leakage from the syringe when the threshold pressure is not being applied; wherein said body portion is a resilient hollow cylindrical member adapted to be placed in sealing engagement with the inner wall of said syringe barrel around the entire circumference of said member, the valve portion being of resilient material and circular in configuration and being circumferentially mounted on the inner surface of said hollow member, a reciprocally movable flap on said valve portion normally in the closed position thereby permitting said valve assembly to seal one end portion of the syringe from the other end portion, the flap being responsive to a predetermined amount of pressure from either end portion of the syringe to be thereby opened and provide a passageway from one end of the syringe to the other end and the resiliency of the flap permitting the flap to return to the normally closed position when the pressure is relieved.

Claim 3

The invention in accordance with claim 1 wherein said flap is formed by a V-shaped cut in the central part of the valve portion.

Claim 4

A retainer valve assembly for a syringe comprising: a body portion having means thereon for mounting said valve assembly in the barrel of said syringe intermediate the ends thereof; a valve portion movably mounted on said body portion and normally being seated in a central opening in said body portion to form a seal and isolate one end portion of the syringe from the other end portion; said valve member being responsive to a predetermined amount of pressure from either end portion of the syringe so as to unseat from said body portion to permit fluid to flow from one end portion of said syringe to the other end portion thereof and when said pressure is relieved the valve member will return to its normal seated position thereby re-forming the seal between the end portions of said syringe and alleviating the danger of leakage from the syringe when the predetermined amount of pressure is not being applied; said body portion including an elongated hollow cylindrical tube adapted to be mounted in said syringe with the outer surface thereof engaging the inner surface of said syringe; a resilient circular diaphragm mounted in said tube in sealing engagement therewith and having an opening therein; an annular shoulder on the circumferential surface of said opening; a pair of cages mounted on the inner surface of said tube with one cage located on one side of said diaphragm and the other cage on the other side of said diaphragm; each cage including an opening in the top surface thereof and a web of members extending toward the diaphragm and arranged in circumferential engagement with the inner surface of said tube; the central portion of said web being opened so as to communicate with the opening in the top surface of said cage; the inner surface of each of said web members tapering outwardly as it approaches the diaphragm thereby providing an open central area in said cage with a larger diameter nearer the diaphragm and a smaller diameter adjacent the top surface of said cage; the openings in said cages and said diaphragm communicating to provide a passageway between one end portion of the syringe and the other end portion thereof; the valve portion of said assembly including a ball of a slightly larger diameter than the inner diameter of the annular shoulder and normally positioned in engagement with said shoulder in an interference fit to thereby prevent communication between the end portions of said syringe; said ball being responsive to a predetermined amount of pressure from the direction of either end portion of said syringe so as to be displaced from engagement with said shoulder in either direction to permit opening of the passageway between the end portions of the syringe; and said cage is being positioned to receive and confine said ball when it is displaced without closing said passageway until the pressure is relieved and said ball will return to its normal closed position in interfering engagement with said annular shoulder.

Claim 5

A retainer valve assembly for a syringe comprising: a body portion having means thereon for mounting said valve assembly in the barrel of said syringe intermediate the ends thereof; a valve portion movably mounted on said body portion and normally being seated in a central opening in said body portion to form a seal and isolate one end portion of the syringe from the other end portion; said valve member being responsive to a predetermined amount of pressure from either end portion of the syringe so as to unseat from said body portion to permit fluid to flow from one end portion of said syringe to the other end portion thereof and when said pressure is relieved the valve member will return to its normal seated position thereby re-forming the seal between the end portions of said syringe and alleviating the danger of leakage from the syringe when the predetermined amount of pressure is not being applied; said body portion including an elongated hollow cylindrical tube adapted to be mounted in said syringe with the outer surface thereof engaging the inner surface of said syringe; a resilient circular diaphragm mounted in said tube in sealing engagement therewith and having an opening therein; an annular shoulder on the circumferential surface of said opening; a pair of cages mounted on the inner surface of said tube with one cage located on one side of said diaphragm and the other cage on the other side of said diaphragm; each cage including an opening in the top surface thereof and a web of members extending toward the diaphragm and arranged in circumferential engagement with the inner surface of said tube; the central portion of said web being opened so as to communicate with the opening in the top surface of said cage; the inner surface of each of said web members tapering outwardly as it approaches the diaphragm thereby providing an open central area in said cage with a larger diameter nearer the diaphragm and a smaller diameter adjacent the top surface of said cage; the openings in said cages and said diaphragm communicating to provide a passageway between one end portion of the syringe and the other end portion thereof; the valve portion of said assembly including a ball of a slightly larger diameter than the inner diameter of the annular shoulder and normally positioned in engagement with said shoulder in an interference fit to thereby prevent communication between the end portions of said syringe; said ball being responsive to a predetermined amount of pressure from the direction of either end portion of said syringe so as to be displaced from engagement with said shoulder in either direction to permit opening of the passageway between the end portions of the syringe; and said cage is being positioned to receive and confine said ball when it is displaced without closing said passageway until the pressure is relieved and said ball will return to its normal closed position in interfering engagement with said annular shoulder.

Claim 6

A retainer valve assembly for a syringe comprising: a body portion having means thereon for mounting said valve assembly in the barrel of said syringe intermediate the ends thereof; a valve portion movably mounted on said body portion and normally being seated in a central opening in said body portion to form a seal and isolate one end portion of the syringe from the other end portion; said valve member being responsive to a predetermined amount of pressure from either end portion of the syringe so as to unseat from said body portion to permit fluid to flow from one end portion of said syringe to the other end portion thereof and when said pressure is relieved the valve member will return to its normal seated position thereby re-forming the seal between the end portions of said syringe and alleviating the danger of leakage from the syringe when the predetermined amount of pressurE is not being applied; said body portion including a resilient circular diaphragm adapted to be mounted in said syringe barrel in sealing engagement therewith and having an opening therein; an annular shoulder on the circumferential surface of said opening; said valve portion including an elongated member having a plurality of spaced ribs extending along the length thereof and a ball-shaped portion mounted intermediate the ends thereof; said valve portion having flanged head portions on both ends; the ball-shaped portion having a slightly larger outer diameter than the inner diameter of said annular shoulder and normally positioned in engagement with said shoulder and in an interference fit to thereby prevent communication between the end portions of said syringe; said ball-shaped portion being responsive to a predetermined amount of pressure from the direction of either end portion of the syringe so as to be displaced from engagement with said shoulder in either direction to permit the opening to be exposed and provide communication between the end portions of the syringe; the flanged head portion having a larger diameter than the opening in said diaphragm so that the displacement of said valve portion is restricted to a desired distance by contact of a flanged head portion with the diaphragm; the flange on said head being spaced so that communication between the end portions of the syringe is not precluded when the head is in contact with the diaphragm; and said flanged head remaining in contact with said diaphragm until the pressure is relieved and then said ball-shaped portion will return to its normal closed position in interfering engagement with said annular shoulder.

Claim 7

A retainer valve assembly for a syringe comprising: a body portion having means thereon for mounting said valve assembly in the barrel of said syringe intermediate the ends thereof; a valve portion movably mounted on said body portion and normally being seated in a central opening in said body portion to form a seal and isolate one end portion of the syringe from the other end portion; said valve member being responsive to a predetermined amount of pressure from either end portion of the syringe so as to unseat from said body portion to permit fluid to flow from one end portion of said syringe to the other end portion thereof and when said pressure is relieved the valve member will return to its normal seated position thereby re-forming the seal between the end portions of said syringe and alleviating the danger of leakage from the syringe when the predetermined amount of pressurE is not being applied; said body portion including a resilient circular diaphragm adapted to be mounted in said syringe barrel in sealing engagement therewith and having an opening therein; an annular shoulder on the circumferential surface of said opening; said valve portion including an elongated member having a plurality of spaced ribs extending along the length thereof and a ball-shaped portion mounted intermediate the ends thereof; said valve portion having flanged head portions on both ends; the ball-shaped portion having a slightly larger outer diameter than the inner diameter of said annular shoulder and normally positioned in engagement with said shoulder and in an interference fit to thereby prevent communication between the end portions of said syringe; said ball-shaped portion being responsive to a predetermined amount of pressure from the direction of either end portion of the syringe so as to be displaced from engagement with said shoulder in either direction to permit the opening to be exposed and provide communication between the end portions of the syringe; the flanged head portion having a larger diameter than the opening in said diaphragm so that the displacement of said valve portion is restricted to a desired distance by contact of a flanged head portion with the diaphragm; the flange on said head being spaced so that communication between the end portions of the syringe is not precluded when the head is in contact with the diaphragm; and said flanged head remaining in contact with said diaphragm until the pressure is relieved and then said ball-shaped portion will return to its normal closed position in interfering engagement with said annular shoulder.

Claim 8

A retainer valve assembly for a syringe comprising: a body portion having means thereon for mounting said valve assembly in the barrel of said syringe intermediate the ends thereof; a valve portion movably mounted on said body portion and normally being seated in a central opening in said body portion to form a seal and isolate one end portion of the syringe from the other end portion; said valve member being responsive to a predetermined amount of pressure from either end portion of the syringe so as to unseat from said body portion to permit fluid to flow from one end portion of said syringe to the other end portion thereof and when said pressure is relieved the valve member will return to its normal seated position thereby re-forming the seal between the end portions of said syringe and alleviating the danger of leakage from the syringe when the predetermined amount of pressure is not being applied; said body portion including a resilient circular diaphragm adapted to be mounted in said syringe barrel in sealing engagement therewith and having an opening therein; an annular shoulder on the circumferential surface of said opening; said valve portion having a pointed forward end tapering outwardly from said point by means of a series of spaced longitudinal ribs which terminate in a ball-shaped intermediate portion normally positioned in contact with said annular shoulder; said ball-shaped intermediate portion having a larger outer diameter than the inner diameter of said resilient annular shoulder thereby providing an interference fit therebetween and preventing communication between the end portions of said syringe; a stem is connected to said intermediate portion and extends rearwardly therefrom; the rear end of said stem is connected to a disc-shaped head; a helical spring surrounds said stem and is held in position by means of connection at one end with said diaphragm and at the other end with the forward surface of said disc-shaped head; said intermediate portion being responsive to a predetermined amount of pressure from the direction of either end portion of the syringe so as to be displaced from engagement with said shoulder in either direction to permit the opening to be exposed and providE communication between the end portions of the syringe; the spring being compressed when the intermediate portion is moved in one direction to thereby compensate by spring force for the pressure and restrict the displacement distance of said intermediate portion and being extended when the intermediate portion is moved in the other direction to thereby compensate by spring force for the pressure and restrict the displacement distance of said intermediate portion in the other direction; and said intermediate portion adapted to return to its normal closed position when the pressure is relieved into interfering engagement with said annular shoulder.

Claim 9

A retainer valve assembly for a syringe comprising: a body portion having means thereon for mounting said valve assembly in the barrel of said syringe intermediate the ends thereof; a valve portion movably mounted on said body portion and normally being seated in a central opening in said body portion to form a seal and isolate one end portion of the syringe from the other end portion; said valve member being responsive to a predetermined amount of pressure from either end portion of the syringe so as to unseat from said body portion to permit fluid to flow from one end portion of said syringe to the other end portion thereof and when said pressure is relieved the valve member will return to its normal seated position thereby re-forming the seal between the end portions of said syringe and alleviating the danger of leakage from the syringe when the predetermined amount of pressure is not being applied; said body portion including a resilient circular diaphragm adapted to be mounted in said syringe barrel in sealing engagement therewith and having an opening therein; an annular shoulder on the circumferential surface of said opening; said valve portion having a pointed forward end tapering outwardly from said point by means of a series of spaced longitudinal ribs which terminate in a ball-shaped intermediate portion normally positioned in contact with said annular shoulder; said ball-shaped intermediate portion having a larger outer diameter than the inner diameter of said resilient annular shoulder thereby providing an interference fit therebetween and preventing communication between the end portions of said syringe; a stem is connected to said intermediate portion and extends rearwardly therefrom; the rear end of said stem is connected to a disc-shaped head; a helical spring surrounds said stem and is held in position by means of connection at one end with said diaphragm and at the other end with the forward surface of said disc-shaped head; said intermediate portion being responsive to a predetermined amount of pressure from the direction of either end portion of the syringe so as to be displaced from engagement with said shoulder in either direction to permit the opening to be exposed and providE communication between the end portions of the syringe; the spring being compressed when the intermediate portion is moved in one direction to thereby compensate by spring force for the pressure and restrict the displacement distance of said intermediate portion and being extended when the intermediate portion is moved in the other direction to thereby compensate by spring force for the pressure and restrict the displacement distance of said intermediate portion in the other direction; and said intermediate portion adapted to return to its normal closed position when the pressure is relieved into interfering engagement with said annular shoulder.