CPC A61M 5/445 (2013.01) [A61M 1/73 (2021.05); A61M 1/743 (2021.05); A61M 1/80 (2021.05); A61M 3/0258 (2013.01); A61M 39/08 (2013.01); A61M 39/227 (2013.01); A61M 2205/02 (2013.01); A61M 2205/3317 (2013.01); A61M 2205/3331 (2013.01); A61M 2205/3344 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/3379 (2013.01); A61M 2205/3393 (2013.01); A61M 2205/368 (2013.01); A61M 2205/502 (2013.01); A61M 2205/505 (2013.01); A61M 2205/52 (2013.01)] | 22 Claims |
1. A pressure regulator, comprising:
a first chamber having an inlet opening for connecting to an external vacuum source;
a second chamber having an outlet opening for supplying a regulated pressure to a regulated source;
a third chamber having a pressure opening for connecting to a pressure source;
a fourth chamber having a sensing opening for connecting to a pressure sensor that senses a pressure in the fourth chamber;
a flexible membrane fluidly isolating the third and fourth chambers from both of the first and second chambers, wherein the flexible membrane is movable by a vacuum pressure applied to the first chamber such that the third and fourth chambers are fluidly connected, and wherein the flexible membrane is movable by a pressure applied by the pressure source such that the first and second chambers are fluidly connected.
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