| 摘要 |
<p>A fluid dispensing apparatus having a) a compressed gas or CO<SUB>2</SUB> cartridge controller, b) a hydraulic pressure medium connected to the CO<SUB>2</SUB> cartridge controller, c) a flow control valve connected to the hydraulic pressure medium; and d) a hydraulic piston connected to the hydraulic pressure medium, whereby a CO<SUB>2</SUB> cartridge applies pressure to the hydraulic pressure medium controlled by the CO<SUB>2</SUB> cartridge controller, the flow control valve is operated to precisely meter hydraulic fluid to the hydraulic piston, and the hydraulic piston provides the linear force to dispense a fluid product with similar and matching regulation under pressure. A rotary valve can be provided to use spent CO<SUB>2</SUB> to retract the piston.</p> |
