| 摘要 |
An automated pressure regulator 60 includes an inlet port 72 configured to engage a pressurized gas bottle 58 to receive pressurized gas therefrom, and an outlet port 74 that may be sealably coupled to an inflatable bladder. The inlet port 72 is in fluid communication with the outlet port 74. The pressure regulator 60 further comprises a moveable check valve, such as a piston 64, disposed between the inlet port 72 and the outlet port 74. A gas seal 88 is engageable with an outer surface 90 of the check valve 64 and is configured so that, upon positive engagement by the check valve 64, the inlet 72 is isolated from the outlet 74. A spring 76 abuts the inner surface 80 of the check valve 64. The spring 76 positively biases the valve 64 against the seal 88 to selectively isolate the inlet port 72 and outlet port 74 when a predetermined closure pressure is exerted on an inner surface 80 of the check valve 64, by a combination of bias applied by the spring 76 and a gas pressure acting on the internal surface 80. |
