Disposable plastic reciprocating valve

• US 4,421,296 A
• Filed: 08/11/1981
• Issued: 12/20/1983
• Est. Priority Date: 07/17/1980
• Status: Expired due to Fees

• Current Assignee: Valve Medical Ltd.
• Original Assignee: Valve Medical Ltd.
• Inventors: Stephens, James W.
• Primary Examiner(s): Chambers, A. Michael
• Application Number:
  US06/291,948
• Time in Patent Office: 861 Days
• Field of Search: 604/99, 604/256, 604/33, 604/249, 251/149.6, 251/149.7
• US Class Current: 251/149.7
• 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: F16K 3/265 with a sleeve sliding in the direction of the flow line

Abstract

A disposable normally closed all plastic reciprocating valve is adapted to be used in a supply line for fluids supplied to or extracted from a patient. The valve is opened by inserting a tube into one end thereof.

Claims

1. A reciprocating valve comprising,

a generally cylindrical hollow casing enclosing a valve chamber defined between axially-spaced inner walls of said casing, one of which walls constitutes a valve seat,

said casing having a bore extending axially therein from one end thereof and through said seat into said chamber,

a reciprocating valve comprising a disc disposed in said chamber, said disc having port means therethrough, stem means on one side thereof reciprocable in said bore, and spring leg means on the other side thereof for engaging the other inner wall of said chamber so as normally to force said disc in seating engagement against said seat,

service port means for said chamber,

said stem means having an open hollow free end portion constituting a service port for receiving a fluid coupling member, a closed end portion integral with said disc, and port means extending from the hollow free end portion to the periphery of the stem,

said port means through the stem and disc being normally masked by the wall of said bore and said seat, respectively, when said spring legs force the valve in one direction to engage the disc against said seat, and being open when said fitting engages into said stem socket and forces the valve member in the other direction against the forces of said spring legs so as to space the disc from the seat and thereby unmask the port means therethrough while moving the port means in the stem beyond the wall of the bore and thereby unmask the same whereby to establish a fluid path from the socket, the port means in the stem, the space between the disc and the seat, the port means in the disc, the valve chamber, and the service port means for the chamber.

2. A reciprocating valve as claimed in claim 1, said reciprocating valve being a one piece plastic member of which the disc, stem means and spring leg means are integral parts.

3. A reciprocating valve as claimed in claim 2, the port means through the disc comprising cut-outs in the periphery thereof.

4. A reciprocating valve as claimed in claim 3, there being a plurality of the port means through the disc which are spaced about the periphery thereof and there being a plurality of spring leg means which are intersperced between the disc port means.