VALVE CONNECTOR
 Inventor: Kevin Murphy, Schaumburg, HI.
 Assignee: Tuthill Corporation. Hinsdale, 111.
 Appl. No.: 840,579
 Filed: Apr. 21,1997
 Int. CI.6 F16L 29/00
 U.S. CI 137/614.05; 137/614.03;
 Field of Search 251/149.6, 149.8;
 References Cited
U.S. PATENT DOCUMENTS
3,926205 12/1975 Gourlet.
4,165,760 8/1979 Guenther.
4,193.419 3/1980 Pellerito 137/614.03 X
4,338,793 7/1982 O'Hem, Jr. 137/614.05 X
4,458,719 7/1984 Strybel 137/614.03
4.664,153 5/1987 Bishop .
4,759,572 7/1988 Richardson .
4,970,904 11/1990 Knotts .
4,995,417 2/1991 Naku.
5,007.448 4/1991 Olinger.
5,056,560 10/1991 DeMartdaere 137/614.04
A connector adapted for a quick connection to and for sealing and filling a valve assembly, such as a Schraeder Valve. The connector provides a secondary containment feature which prevents leakage when removing the connector, thereby improving performance and efficiency. The connector includes a collet member at one end that fits over the threaded portion of the valve assembly and. when closed, compresses a seal that engages the external threads of the valve, thereby eliminating the need for threading an external fitting on the valve assembly. As the system pressure increases, an internal plunger, having a forward flow orifice and a rear inlet orifice, is axially displaced and depresses the valve assembly stem. Simultaneously, the forward orifice passes ahead of an internal O-ring and allows fluid flow. As pressure is relieved from the system, the plunger and forward flow orifice move behind the internal O-ring and seal the piston chamber, thereby preventing leakage when removing the connector.
12 Claims, 4 Drawing Sheets