INTRAVENOUS VALVE ASSEMBLY

• US 3,570,484 A
• Filed: 08/20/1968
• Issued: 03/16/1971
• Est. Priority Date: 08/31/1967
• Status: Expired due to Term

• Current Assignee: Steer Peter Leslie, Venn Paul Hex
• Original Assignee: Steer Peter Leslie, Venn Paul Hex
• Inventors: STEER PETER LESLIE, VENN PAUL HEX
• Application Number:
  US04/754,064
• Time in Patent Office: 938 Days
• US Class Current: 604/249
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150221 Valves
• CPC Class Codes: A61B 5/150259 Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150519 Details of construction of hub, i.e. element used to attach the single-ended needle to a piercing device or sampling device
• CPC Class Codes: A61B 5/153 Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
• CPC Class Codes: A61B 5/155 Devices specially adapted for continuous or multiple sampling, e.g. at predetermined intervals devices loaded with multiple lancets simultaneously A61B5/15146
• CPC Class Codes: A61M 2005/3128 Incorporating one-way valves, e.g. pressure-relief or non-return valves
• CPC Class Codes: A61M 39/26 Valves closing automatically on disconnecting the line and opening on reconnection thereof check valves A61M39/24
• CPC Class Codes: Y10S 604/90 Telltale showing entry of blood into body inserted conduit

Abstract

The invention relates to devices for administering intravenous injections of liquids such as drugs, anesthetics or transfusion liquids. The device includes a valve body having a holder for an injection needle. The holder has an outlet passage which communicates with the needle. A nonreturn valve is arranged in the valve body. A valve operating plunger has a portion projecting from the body to enable the valve to be opened by operation of the plunger. The plunger has an inlet passage through which liquid to be injected can pass from a syringe into the valve body and thence pass the nonreturn valve to the outlet passage.

Claims

1. A device for administering injection of fluid into and withdrawal thereof from a patient, said device comprising an elongated hollow body apertured at both ends thereof, a hollow needle holder at one end of the body and a fluid receptacle engagement at the other end of said body, a valve seat within the body, a movable valve member within the body, a longitudinally apertured plunger located within the body and limitedly movable longitudinally therewithin, spring means within the body between the one end thereof and the valve member urging the valve member normally against the valve seat and the inner end of the plunger thereby to close off communication through the device, the outer end of the plunger being engageable by a fluid receptacle from the other end of the body wherein inward movement of the plunger under the influence of the fluid expressed from the engaged receptacle against the normal biasing of the spring within the body unseats the valve thereby to open communication through the valve body in both directions selectively from and to the fluid receptacle.

2. A device as in claim 1 wherein the valve body, between the valve member seat and the said other end, is provided with an inwardly directed shoulder to limit longitudinal movement of the plunger within the body against the shoulder in a rearward direction under the normal biasing of the spring and against the valve member to the limit of compression of the spring means under positive forward movement of the plunger, the fluid receptacle engaging end of the plunger normally extending rearwardly of the body past the shoulder and being readily accessible for engagement by a movement controlling receptacle.