Patent ID: 8215522

Claim:
A hand-held flow metering device for dispensing a pressurized fluid, the device comprising: a platform comprising: a blind end valve bore extending into the platform; a high pressure fluid passage extending along a first axis that is centered on the blind end valve bore; a low pressure fluid passage extending along a second axis that is tangent to the blind end valve bore; and a release bore extending into the platform spaced from the low pressure fluid passage; a valve disposed within the blind end valve bore and connected to the pressurized fluid for regulating flow of the pressurized fluid through the device; a flow meter disposed within the flow of pressurized fluid to measure volumetric flow of the pressurized fluid; a trigger lever configured to be manually displaced to mechanically open the valve; a trigger release mechanism disposed within the release bore and connected to the trigger lever and selectively actuated to mechanically prevent the trigger lever from opening the valve when the trigger lever is displaced; and meter electronics connected to the flow meter and the trigger release mechanism to actuate the trigger release mechanism based on output of the flow meter.