CLOSED SYSTEM LIQUID TRANSFER APPARATUS WITH PRESSURE-SENSITIVE SHUT-OFF

• US 3,662,793 A
• Filed: 10/29/1969
• Issued: 05/16/1972
• Est. Priority Date: 10/29/1969
• Status: Expired due to Term

• Current Assignee: Jay V. Calisher, Ross E. Burbick
• Original Assignee: Jay V. Calisher, Ross E. Burbick
• Inventors: Calisher, Jay V., Burbick, Ross E.
• Primary Examiner(s): Bell, Jr., Houston S.
• Application Number:
  US04/872,146
• Time in Patent Office: 930 Days
• Field of Search: 141/192-229,346-362,302 137/432,461
• US Class Current: 141/198
• CPC Class Codes: B64D 39/00 Refuelling during flight filling or emptying fuel tanks B64D37/14
• CPC Class Codes: F16K 31/18 actuated by a float floats F16K33/00; float-actuated valves in steam-traps F16T1/20, in boilers F22D5/08
• CPC Class Codes: F16L 37/127 using hooks hinged about an axis F16L37/1215 takes precedence
• 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 137/7433 Float surrounds inlet pipe
• CPC Class Codes: Y10T 137/7728 High pressure cut-off

Abstract

A vented tank has a receptacle fitting at its fill port that mates with a nozzle on the end of a supply hose. Both the receptacle fitting and the nozzle have normally closed valves which open in response to mating of the two parts. The nozzle fitting is equipped with a normally closed snap acting valve which is cocked open during the filling operation and snaps closed in response to abrupt rise in back pressure in the receptacle fitting. The receptacle fitting is equipped with a float valve which closes to cause the abrupt rise in back pressure as the tank fills.

Claims

1. In an apparatus for filling a tank with liquid wherein the tank has a fill port, the combination comprising:

a receptacle fitting in the fill port of the tank, said receptacle fitting having a main flow outlet port into the tank interior and being equipped with a float-actuated valve to close said outlet port in response to rise in liquid level in the tank thereby to create back pressure to actuate said control means to close said shutoff valve;

a nozzle adapted to releasably engage the receptacle fitting and mate therewith in a fluid-tight manner such that back pressure is transmitted to the nozzle from the receptacle fitting, said nozzle being in connection with a source of fluid under relatively high pressure, a shut-off valve incorporated in said nozzle to cut off discharge from the nozzle into the tank in response to rise in the liquid level within the tank to a predetermined point with a consequent rise in the back pressure in the nozzle; and

control means for releasing said valve responsive to the rise in back pressure to close off the nozzle.

2. Apparatus in accordance with claim 1 in which the receptacle fitting has a dependent outlet having main flow outlet ports and a float-actuated sleeve valve is movable to close the outlets.

3. Apparatus in accordance with claim 2 wherein said float-actuated sleeve valve embraces the dependent outlet and is urged into closing position about the outlet ports in response to a rise in liquid level within the tank.

4. In an apparatus for filling a tank with liquid wherein the tank has a fill port, the combination comprising:

a receptacle fitting in the fill port of the tank, said receptacle fitting having a dependent outlet with an upright cylindrical wall with at least one radial port into the tank interior, and a float-actuated sleeve valve responsive to rise in liquid level in the tank thereby to create back pressure in said fitting, and in which said sleeve valve comprises a primary bouyant sleeve movable by float action from a lower position to an upper position closing the radial port, and a secondary sleeve carried by the primary sleeve, said secondary sleeve being bouyant and movable away from the primary sleeve to close the radial port if the primary sleeve fails to do so;

a nozzle adapted to releasably engage the receptacle fitting and mate therewith in a fluid-tight manner such that back pressure is transmitted to the nozzle from the receptacle fitting, said nozzle being in connection with a source of fluid under relatively high pressure;

a shut-off valve incorporated in said nozzle to cut off discharge from the nozzle into the tank in response to rise in the liquid level within the tank to a predetermined point with a consequent rise in the back pressure in the nozzle; and

control means for said valve responsive to the rise in back pressure.

5. Apparatus in accordance with claim 4 in which the primary sleeve has an upwardly facing exterior shoulder, and in which the secondary sleeve slidingly embraces the primary sleeve and normally rests on said shoulder.