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| Number | Title | Issue Date |
| 8096315 | Double-walled contained shear valve, particularly for fueling environments A double-walled contained shear valve comprises of an inner housing forming a fuel flow path, and a containment housing surrounding the inner housing, either partially or wholly, to provide a secondary containment. An interstitial space is formed between the inner h... | 01/17/2012 |
| 8075667 | Fuel storage tank pressure management system and method employing a carbon canister A carbon canister to adsorb hydrocarbons from a hydrocarbon air mixture in a UST system to prevent fugitive emissions due to overpressurization. The carbon canister has an inlet port at one end coupled to the UST system. An outlet port on the opposite end of the can... | 12/13/2011 |
| 7975528 | Fueling system vapor recovery and containment performance monitor and method of operation thereof A method and apparatus for monitoring and determining fuel vapor recovery performance is disclosed. The dispensing of liquid fuel into a tank by a conventional gas pump nozzle naturally displaces a mixture of air and fuel ullage vapor in the tank. These displaced va... | 07/12/2011 |
| 7946309 | Vacuum-actuated shear valve device, system, and method, particularly for use in service station environments A vacuum-actuated shear valve coupled between piping from a storage tank and piping internal to a fuel dispenser that automatically opens and closes in response to a vacuum level. A vacuum actuator is provided to control a fuel flow valve inside the shear valve. Whe... | 05/24/2011 |
| 7909069 | System and method for automatically adjusting an ORVR compatible stage II vapor recovery system to maintain a desired air-to-liquid (A/L) ratio A system and method for automatically adjusting an ORVR-compatible Stage II vapor recovery system to maintain the air-to-liquid (A/L) ratio within desired tolerances or limits to meet regulatory and/or other requirements. An air flow sensor (AFS) or vapor flow meter... | 03/22/2011 |
| 7753067 | Shear valve employing two-stage poppet valve, particularly for use in fueling environments A shear valve employing a two-stage main poppet valve. The two-stage main poppet valve that can be opened with less force than normally required by prior art designs. For example, if there is pump pressure trapped on the upstream side of the two-stage main poppet va... | 07/13/2010 |
| 7726336 | Siphon system for a submersible turbine pump that pumps fuel from an underground storage tank A submersible turbine pump (STP) is provided. The STP includes a manifold having an integral siphon connection coupled to a fuel flow path in the STP and a siphon cartridge removably inserted into the manifold via the siphon connection. In general, the siphon cartri... | 06/01/2010 |
| 7681583 | Double-walled contained shear valve, particularly for fueling environments A double-walled contained shear valve comprises of an inner housing forming a fuel flow path, and a containment housing surrounding the inner housing, either partially or wholly, to provide a secondary containment. An interstitial space is formed between the inner h... | 03/23/2010 |
| 7566358 | Fuel storage tank pressure management system and method employing a carbon canister A carbon canister to adsorb hydrocarbons from a hydrocarbon air mixture in a UST system to prevent fugitive emissions due to overpressurization. The carbon canister has an inlet port at one end coupled to the UST system. An outlet port on the opposite end of the can... | 07/28/2009 |
| 7561040 | Wireless probe system and method for a fueling environment A fueling environment is equipped with leak detection probes and liquid level probes. Each of the probes is associated with a wireless transceiver. The wireless transceivers send probe data to a site communicator wireless transceiver. To ensure that the site communi... | 07/14/2009 |
| 7555935 | End-of-line zone integrity detection for a piping network in a secondary containment monitoring and leak detection system An end-of-zone or line sensor placed at the end of a secondarily contained fuel piping(s) or network(s). The interstitial space of the piping network is coupled to a vacuum-generating source that draws a vacuum level in the interstitial space to monitor for leaks or... | 07/07/2009 |
| 7503205 | Redundant vacuum source for secondary containment monitoring and leak detection system and method A redundant vacuum-generating source system and method for generating and/or maintaining a vacuum level in a secondarily contained fuel-handling component that is monitored for leaks. The vacuum-generating source is coupled to upstream fuel-handling components to dr... | 03/17/2009 |
| 7454969 | Fuel density measuring device, system, and method using magnetostrictive probe bouyancy A magnetostrictive fuel level probe includes a spring-loaded foot. The probe shaft of the fuel level probe moves up and down within the spring-loaded foot as a function of fuel density. The spring-loaded foot includes a reference magnet whose height relative to the ... | 11/25/2008 |
| 7403860 | Method using magnetostrictive probe buoyancy for detecting fuel density A magnetostrictive fuel level probe includes a spring-loaded foot. The probe shaft of the fuel level probe moves up and down within the spring-loaded foot as a function of fuel density. The spring-loaded foot includes a reference magnet whose height relative to the ... | 07/22/2008 |
| 7318708 | Check valve for a submersible turbine pump The present invention provides a submersible turbine pump (STP) comprising a check valve located within a hydraulics cavity, wherein the STP provides the ability to depressurize the hydraulics cavity by relieving a pressure differential between an inlet side and an ... | 01/15/2008 |
| 7275417 | Fueling system vapor recovery and containment performance monitor and method of operation thereof A method and apparatus for monitoring and determining fuel vapor recovery performance is disclosed. The dispensing of liquid fuel into a tank by a conventional gas pump nozzle naturally displaces a mixture of air and fuel ullage vapor in the tank. These displaced va... | 10/02/2007 |
| 7152004 | Method and system for determining and monitoring dispensing point flow rates and pump flow capacities using dispensing events and tank level data A system and method for calculating the flow rate of a dispensing point or flow capacity of a pump and fuel delivery system and determining if the dispensing point or fuel delivery system has a blockage and/or a performance problem if the calculated dispensing point... | 12/19/2006 |
| 7059366 | Air bleed mechanism for a submersible turbine pump A manifold for a submersible turbine pump having an air bleed mechanism for removing air from a discharge chamber of the manifold. The manifold includes the discharge chamber that receives fuel pumped from an underground storage tank (UST), the air bleed mechanism, ... | 06/13/2006 |
| 6975964 | Method and system for determining and monitoring the dispensing efficiency of a fuel dispensing point in a service station environment Determining a maximum dispensing efficiency of a dispensing point in a fuel dispenser and determining if a dispensing point has a blockage and/or a performance problem if the maximum dispensing efficiency is less than expected. The maximum dispensing efficiency is c... | 12/13/2005 |
| 6968868 | Fueling system vapor recovery and containment performance monitor and method of operation thereof A method and apparatus for monitoring and determining fuel vapor recovery performance. The dispensing of liquid fuel into a tank by a gas pump nozzle displaces a mixture of air and fuel ullage vapor in the tank. These displaced vapors may be recovered at the dispens... | 11/29/2005 |
| 6964283 | Fueling system vapor recovery and containment performance monitor and method of operation thereof A method and apparatus for monitoring and determining fuel vapor recovery performance is disclosed. The dispensing of liquid fuel into a tank by a conventional gas pump nozzle naturally displaces a mixture of air and fuel ullage vapor in the tank. These displaced va... | 11/15/2005 |
| 6901786 | Fueling system vapor recovery and containment leak detection system and method A method and apparatus for monitoring a fuel vapor recovery system to determine if a leak condition exists in either the vapor return passage in a fuel dispenser or a common vapor return pipe. An air-flow sensor (AFS) may be located in the common vapor return pipe f... | 06/07/2005 |
| 6880585 | Fueling system vapor recovery and containment performance monitor and method of operation thereof A method and apparatus for monitoring and determining fuel vapor recovery performance is disclosed. The dispensing of liquid fuel into a tank by a conventional gas pump nozzle naturally displaces a mixture of air and fuel ullage vapor in the tank. These displaced va... | 04/19/2005 |
| 6840292 | Apparatus and method to control excess pressure in fuel storage containment system at fuel dispensing facilities A system and method for removing, compressing, and storing excess air and vapors from a fuel dispensing facility fuel storage containment system during periods of over-pressurization without venting or processing the excess air and vapors. The stored air and vapors ... | 01/11/2005 |
| 6834534 | Fuel storage tank leak prevention and detection system and method A storage tank leak detection and prevention system that detects a breach or leak in the interstitial space of a double-walled fuel storage tank in a service station environment. The interstitial space is placed under a vacuum using a submersible turbine pump that i... | 12/28/2004 |
| 6802345 | Fueling system vapor recovery and containment performance monitor and method of operation thereof A method and apparatus for monitoring and determining fuel vapor recovery performance is disclosed. The dispensing of liquid fuel into a tank by a conventional gas pump nozzle naturally displaces a mixture of air and fuel ullage vapor in the tank. These displaced va... | 10/12/2004 |
| 6802344 | Fueling system vapor recovery and containment performance monitor and method of operation thereof A method and apparatus for monitoring and determining fuel vapor recovery performance is disclosed. The dispensing of liquid fuel into a tank by a conventional gas pump nozzle naturally displaces a mixture of air and fuel ullage vapor in the tank. These displaced va... | 10/12/2004 |
| 6622757 | Fueling system vapor recovery and containment performance monitor and method of operation thereof A method and apparatus for monitoring and determining fuel vapor recovery performance is disclosed. The dispensing of liquid fuel into a tank by a conventional gas pump nozzle naturally displaces a mixture of air and fuel ullage vapor in the tank. These d... | 09/23/2003 |
| 6625519 | Pump controller for submersible turbine pumps A method and apparatus for detecting the dry-run operation of a submersible fuel pump operating in a network of fuel pumps is disclosed in which the pump controller is able to switch itself off upon detection of a dry-run condition. After shutting itself ... | 09/23/2003 |
| 5665895 | Apparatus and method for calibrating a storage tank An apparatus and method are provided for calibrating a liquid storage tank. The apparatus includes a sensor disposed within the tank for sensing the liquid levels in the tank and one or more metering devices for measuring the amount of liquid dispensed in... | 09/09/1997 |
| 5544518 | Apparatus and method for calibrating manifolded tanks An apparatus and method are provided for calibrating manifolded liquid storage tanks. The apparatus includes sensors disposed within the tanks for sensing the liquid levels in each of the tanks and a metering device for measuring the amount of liquid disp... | 08/13/1996 |
