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US 11,524,888 B1Granted
Vapor recovery system for mobile fuelers
OwnerBob J. Hillinventor
Life of this patent
Estimating the term…
Abstract
A system for recovering fuel vapor during delivery of fuel by a mobile fueler includes a storage tank covered with a layer of insulation, a supply pump connected to the storage tank for delivering fuel therefrom, and a fuel dispensing assembly, preferably a coaxial hose and nozzle, including a supply outlet for delivering fuel to a vehicle being fueled, and a vapor recovery inlet proximate the supply outlet. A diverter valve diverts a portion of the fuel in the supply line, and a vacuum jet pump is connected to the storage tank and, by a vapor line, to the vapor recovery inlet, which is driven by the diverted fuel to create a vacuum in the vapor line to draw vapor into the vapor recovery inlet, through the vapor line, and into the storage tank.
Claims20
A vapor recovery system for a mobile fueler during a fuel operation,
- comprising:
- a. a vacuum jet pump comprising:
- i. a housing body, having a vapor recovery inlet and a liquid fuel inlet, a surge cavity, an ullage pressure channel, a mixing channel, a housing collar, an upper central cylindrical conduit, and a lower cylindrical conduit;
- ii. a diaphragm assembly having a collar securing a control rod in the center of a diaphragm gasket and a spring;
- iii. an upper housing cap having an ullage pressure port and being operable to secure said diaphragm assembly against said housing body to provide a fluid-tight seal, the diaphragm assembly gasket defining an upper diaphragm cavity and a lower diaphragm cavity;
- iv. a control valve having a pilot valve, a flow gate, a central shaft conduit, and a spring seat securing a control spring, wherein said control valve is positioned in said upper central cylindrical conduit and said control spring interfaces with said housing collar;
- v. an aerator having a central shaft conduit having a central shaft and a converging nozzle conduit operable to be sealed by said control rod, wherein said aerator and converging nozzle secured in said lower cylindrical housing conduit;
- and
- vi. a lower housing cap having a vapor return line and an ullage pressure port, and is operable to secure a lower housing gasket to said housing body and provide a fluid-tight seal;
- b. a mobile fueler having a storage tank in communication with a supply pump that is operable to deliver fuel through a supply line to a fuel dispensing assembly having a vapor recovery inlet;
- c. a fuel diverter line in communication with said supply line and said housing liquid fuel inlet, and a vapor recover line connecting said vapor recovery inlets of said housing and fuel dispensing assembly;
- wherein said diaphragm assembly is normally open and during a fuel operation liquid fuel fills said upper central cylindrical conduit and provides a fluid pressure operable to overcome the control spring bias and allows liquid fuel to pass through said fuel gate to said aerator for developing a uniform flow to said converging nozzle and rapidly expanding in said mixing chamber thereby generating a vacuum on said surge chamber and depositing said fluid vapor mixture into said storage tank.
9 more elements
A vapor recovery system for a mobile fueler during a fuel operation,
- comprising:
- a. a vacuum jet pump including
- i. a housing body, having a vapor recovery inlet and a liquid fuel inlet, a surge cavity, an ullage pressure channel, a mixing channel, a housing collar, an upper central cylindrical conduit, and a lower cylindrical conduit;
- ii. a diaphragm assembly having a collar securing a control rod in the center of a diaphragm gasket and a spring;
- iii. an upper housing cap having an ullage pressure port and being operable to secure said diaphragm assembly against said housing body to provide a fluid-tight seal, the diaphragm assembly gasket defining an upper diaphragm cavity and a lower diaphragm cavity;
- iv. a control valve having a pilot valve, a flow gate, a central shaft conduit, and a spring seat securing a control spring, wherein said control valve is positioned in said upper central cylindrical conduit and said control spring interfaces with said housing collar;
- v. an aerator having a central shaft conduit having a central shaft and a converging nozzle conduit operable to be sealed by said control rod, wherein said aerator and converging nozzle secured in said lower cylindrical housing conduit;
- and
- vi. a lower housing cap having a vapor return line and an ullage pressure port, and is operable to secure a lower housing gasket to said housing body and provide a fluid-tight seal.
6 more elements
A vapor recovery system for a mobile fueler during a fuel operation,
- comprising:
- a. a vacuum jet pump including
- i. a vapor recovery inlet and a liquid fuel inlet, a surge cavity, an ullage pressure channel, a mixing channel, a housing collar, an upper central cylindrical conduit, and a lower cylindrical conduit;
- ii. a diaphragm assembly having a collar securing a control rod in the center of a diaphragm gasket and a spring;
- iii. an upper housing cap having an ullage pressure port and being operable to secure said diaphragm assembly against said housing body to provide a fluid-tight seal, the diaphragm assembly gasket defining an upper diaphragm cavity and a lower diaphragm cavity;
- iv. a control valve having a pilot valve, a flow gate, a central shaft conduit, and a spring seat securing a control spring, wherein said control valve is positioned in said upper central cylindrical conduit and said control spring interfaces with said housing collar;
- and
- v. an aerator having a central shaft conduit having a central shaft and a converging nozzle conduit operable to be sealed by said control rod, wherein said aerator and converging nozzle secured in said lower cylindrical housing conduit.
5 more elements
Dependencies are inferred from the claim text.