COUPLING FOR CONNECTING A RECHARGEABLE RESERVOIR WITH A PRESSURISED RECHARGING TANK

• US 3,574,314 A
• Filed: 01/03/1969
• Issued: 04/13/1971
• Est. Priority Date: 01/09/1968
• Status: Expired due to Term

• Current Assignee: Quercia Roger Charles
• Original Assignee: Quercia Roger Charles
• Inventors: QUERCIA ROGER CHARLES
• Application Number:
  US04/788,827
• Time in Patent Office: 830 Days
• US Class Current: 141/349
• CPC Class Codes: F23Q 2/52 Filling devices in general B67D
• CPC Class Codes: Y10T 137/7869 Biased open
• CPC Class Codes: Y10T 137/7877 With means for retaining external means in bias opposing position
• CPC Class Codes: Y10T 137/87917 Flow path with serial valves and/or closures
• CPC Class Codes: Y10T 137/87965 Valve- or closure-operated by coupling motion
• CPC Class Codes: Y10T 137/88078 Actuates valve

Abstract

A coupling for connecting a gas lighter reservoir to a highpressure refill tank comprises a first coupling member fitted to the lighter reservoir and providing a screw-threaded socket to receive a screw-threaded spigot on a second coupling member of the refill tank. Both coupling members have check valves urged into their closed positions by a compression spring, the compression spring in the first coupling member being weaker than that in the second coupling member and the valve members of the check valves being provided with means acting between the members when the coupling members are screwed together to displace the first valve member, in the first coupling member and subsequently the valve member in the second coupling member from their respective seats. An abutment is provided in the first coupling member which engages the respective coupling member before its compression spring is compressed sufficiently to cause permanent deformation to the valve member in the second coupling member being displaced after the valve member in the first coupling member has engaged said abutment.

Claims

1. A coupling for connecting a rechargeable reservoir with a pressurized feed tank comprising a first coupling member for fitting to said reservoir and comprising a first internally screw-threaded annular part and a second complementary externally screw-threaded annular part received in and threadingly connected to said internally screw-threaded annular part, said second annular part having one surface forming a valve seat and an opposite surface formed with a diametrical slot to receive a screwdriver;

a washer abutting against said opposite surface and partially covering said slot;

a resilient sealing ring bearing against the side of said washer remote from said annular part;

a second coupling member for fitting to the feed tank and being formed with an external screw thread complementary to said internal screw thread of said first annular part of said first member so that said coupling members can be screwed together compressing thereby the sealing ring to provide a hermetic seal between said members;

a spigot formed on said second coupling member extending when said coupling members are screwed together into said sealing ring;

a valve seat in said second coupling member;

a valve member for each valve seat;

a compression spring for each valve member for urging the latter against its valve seat;

means in said coupling members for moving each valve member away from its seat when said coupling members are screwed together;

an abutment within said first coupling member for engaging the valve member therein to limit its movement away from its seat to prevent permanent deformation of the spring cooperating therewith, the compression spring in said first coupling member being weaker than that in said second coupling member, whereby when said coupling members are screwed together the valve member in said first coupling member will be displaced from its valve seat before the other valve member is so displaced, one of said parts being of harder material than the other, a sharp annular edge being formed on one of said parts and a shoulder on the other part, whereby when said parts are screwed together said sharp annular edge bites into said shoulder to provide a hermetic seal between said parts.