NOZZLE FOR LIQUID-FUEL-DISPENSING APPARATUS

• US 3,590,890 A
• Filed: 02/03/1969
• Issued: 07/06/1971
• Est. Priority Date: 02/03/1969
• Status: Expired due to Term

• Current Assignee: Einar T. Young
• Original Assignee: Einar T. Young
• Inventors: Young, Einar T.
• Application Number:
  US04/796,003
• Time in Patent Office: 883 Days
• US Class Current: 141/192
• CPC Class Codes: B67D 7/048 Vapour flow control means, e.g. valves, pumps
• CPC Class Codes: B67D 7/3236 relating to electrostatic charges
• CPC Class Codes: B67D 7/52 and provided with additional flow-controlling valve means
• CPC Class Codes: B67D 7/54 with means for preventing escape of liquid or vapour or for recovering escaped liquid or vapour B67D7/44 takes precedence
• CPC Class Codes: F16K 21/00 Fluid-delivery valves, e.g. self-closing valvesfor liquid handling B67D; for flushing devices for water-closets or the like E03D

Abstract

A nozzle, for use with liquid-fuel-dispensing apparatus employing a liquid fuel pump, carries electrical control means which permits the pump to be energized only when the nozzle is properly inserted into the metallic fill pipe of a fuel tank. Automatic shutoff means, associated with a return vapor line extending from the fuel tank to a vacuum pump in the housing of the dispensing apparatus, is provided to stop the dispensing of fuel when the tank is full.

Claims

1. In combination, a liquid fuel pump, an electrical energization circuit for said pump, a dispensing nozzle receptive of fuel from said pump and adapted to be inserted for dispensing purposes into the metallic fillpipe of a fuel tank, means providing a pair of spaced external metallic surfaces, electrically insulated from each other, on said nozzle, said surfaces being arranged to both come into direct ohmic contact with said fillpipe when said nozzle is inserted thereinto, thereby to electrically connect said surfaces together through said fillpipe;

and means connecting said surfaces electrically in series in said pump energization circuit, thereby to permit or prevent energization of said pump according to whether said nozzle is or is not inserted in the fuel tank fillpipe.

2. Combination according to claim 1, wherein one of said surfaces comprises the outer face of a sleeve surrounding the exterior of said nozzle.

3. Combination according to claim 1, wherein each of said surfaces comprises a respective portion of the outer wall of said nozzle.

4. In combination, a liquid fuel pump, an electrical energization circuit for said pump, a dispensing nozzle receptive of fuel from said pump and adapted to be inserted for dispensing purposes into the fillpipe of a fuel tank, a conduit in said nozzle for conveying gases in a direction opposite to the direction of fuel flow through said nozzle, said conduit communicating with the exterior of said nozzle adjacent the dispensing end thereof;

means coupled to said conduit for establishing a subatmospheric pressure therein, a pair of electrical contacts adapted to cooperate with each other, means providing a pair of spaced external metallic surfaces, electrically insulated from each other, on said nozzle, said surfaces being arranged to both come into direct ohmic contact with a metallic fillpipe into which said nozzle is inserted, thereby to electrically connect said surfaces together through said fillpipe;

means connecting said surfaces electrically in series with said contacts means connecting said contacts electrically in series with said contacts, means connecting said contacts electrically in series in said pump energization circuit, and means responsive to a pressure change in said conduit for actuating said contacts.

5. Combination according to claim 4, wherein one of said surfaces comprises a portion of the outer wall of said nozzle.

6. Combination according to claim 4, wherein one of said surfaces comprises the main body portion of said nozzle.

7. Combination according to claim 6, wherein the other of said surfaces comprises a portion of the outer wall of said nozzle.