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Fuel dispensing system with controlled vapor withdrawal

  • US 4,260,000 A
  • Filed: 06/04/1979
  • Issued: 04/07/1981
  • Est. Priority Date: 06/04/1979
  • Status: Expired due to Term
First Claim
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1. A dispensing system for a vaporizable liquid which is held in a storage tank 10, a dispenser including a pump 15 having its suction communicated with the storage tank 10 to receive a flow of liquid from the latter, and the pump 15 having a discharge communicated with a liquid flow regulator 17;

  • a vacuum source 48 including an inductor 27 means inlet 28 and outlet ports, and being operable to circulate a vaporous stream of said vaporizable liquid and to establish a vacuum condition at the inlet port 28 thereof, and having the inductor outlet port communicated with said storage tank 10,a nozzle 18 adapted to removably engage a tank 19 positioned to receive a flow of the liquid, said nozzle 18 including a vapor passage 23 to receive vapors which are displaceable from said tank 19 by incoming vaporizable liquid,first conduit means 25 communicating said nozzle 18 with said flow regulator 17 to receive a controlled fuel flow from the latter,second conduit means 24 communicating said nozzle vapor passage 23 with said vacuum source inductor inlet 28 whereby to establish a reduced pressure in the said second conduit means 24 while vapor is flowing therethrough, and a constricted section 26 in said second conduit means 24 positioned to throttle the flow of vapor flowing through the latter.

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