http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2054273-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_40669e1a62019205b4388ffb31374994 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6391a290fd36c60084c43327780f32ec |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T137-2544 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T137-87217 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T137-7761 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G05D16-2053 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G05D16-202 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61M1-743 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61M1-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G05D16-20 |
| filingDate | 1991-10-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_add3c96e8886bd77cd87dd9a8135ea50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cc5476450fd26cbee973ae083b917f6d |
| publicationDate | 1992-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2054273-A1 |
| titleOfInvention | Proportional valve and pressure control system |
| abstract | PROPORTIONAL VALVE AND PRESSURE CONTROL SYSTEM Abstract of the Invention A pressure control system is disclosed for closely regulating the pressure level of a controlled volume. The system comprises first and second sources, a throttled valve for controlling the flow rate of the fluid between each of the first and second pressure sources and the controlled volume, and a feedback control. The throttled valve comprises a rotationally mounted cam, a housing for receiving the cam and including a chamber, a first port coupled to the first pressure source, a second port coupled to the controlled volume, and a third port coupled to the second pressure source. The cam has first and second cam surface portions for defining corresponding first and second transfer functions of fluid flow through the first and second ports, respectively. First and second metering needles are associated with the first and third ports respectively for throttling the fluid flows therethrough. The first and second metering needles are disposed to engage respectively the first and second cam surface portions. A transducer is associated with the controlled volume for providing an output signal indicative of the pressure level therein. A set point indicative of the desired pressure level within the controlled volume is entered into the feedback control, which compares the entered set point with the measured pressure level to determine that desired angular position of the cam with respect to the housing which will provide a corresponding desired rate of fluid flow through the first and second ports. |
| priorityDate | 1990-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 31.