Refrigeration coupling

• US 4,892,117 A
• Filed: 11/10/1988
• Issued: 01/09/1990
• Est. Priority Date: 11/10/1988
• Status: Expired due to Term

• Current Assignee: Parker Intangibles LLC (Parker-Hannifin Corporation)
• Original Assignee: Aeroquip Corporation (Eaton Corporation PLC.)
• Inventors: Spalink, Robert D., Kusztowny, John T., Knowles, Steven M.
• Primary Examiner(s): Fox, John
• Application Number:
  US07/269,729
• Time in Patent Office: 425 Days
• Field of Search: 137/614.03
• US Class Current: 137/614.03
• CPC Class Codes: F16L 37/23 by means of balls
• CPC Class Codes: F16L 37/34 at least one of the lift valves being of the sleeve type, i.e. a sleeve is telescoped over an inner cylindrical wall
• CPC Class Codes: Y10T 137/87949 Linear motion of flow path sections operates both

Abstract

The invention relates to refrigeration couplings and more specifically to an improved valve construction for maximizing fluid flow in a small diameter coupling with a minimum of pressure loss. The invention incorporates a quick assembly of internal parts which are removable for repair and changing of the sealing rings which are used in the self-sealing valves.

Claims

1. A coupling used in the charging and recharging of refrigeration circuits, comprising, in combination, a female part having an axial passage having an inner connection end and an open outer end, a male part having an axial passage having an inner connection end and an outer end adapted to be received within said female part outer end, connection means defined on said parts for selectively coupling said parts'"'"' open ends in coaxial communication, a first self-sealing valve within said passage of said male part axially moveable between open and closed positions having a maximum diameter, a first annular sealing ring mounted on said valve adjacent said maximum diameter, said passage of said male part having a cylindrical sealing surface receiving and engaging said first sealing ring in said closed position, an annular recess defined in said male part passage adjacent said cylindrical surface, said first valve maximum diameter being radially aligned with said recess when said first valve is in said open position, a self-sealing valve sleeve within said passage of said female part axially moveable between open and closed positions and having an outer end, an inner cylindrical surface, and an annular recess between said valve outer end and said cylindrical surface, a coaxial probe fixed within said female part passage having a free end extending toward said female part open end and having a maximum diameter, a second annular sealing ring mounted on said probe adjacent said probe maximum diameter, said valve sleeve circumscribing said probe, said probe mounted sealing ring being received within and engaging said valve sleeve cylindrical surface when said valve sleeve is in said closed position, said valve sleeve recess being radially aligned with said probe maximum diameter when said valve sleeve is in said open position, said male and female parts each having releasable connection means for connecting said parts open outer ends to produce an open passage between said parts when fully coupled, a compression coil spring in each said parts biasing each said valve towards its closed position, said male part engaging said valve sleeve outer end and said probe engaging said first valve upon connection of said parts to displace said valve and valve sleeve to their open positions.