| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b051f9f7933c758e66f6ceda5c9fb2cc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ec487d620029ab01ad5d40b38fe7c56e |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T137-7759 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F15-125
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F1-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F15-043
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F1-76
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F1-86
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F15-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F15-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F15-063
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F15-12 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01F1-86
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01F1-76
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F16K17-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01F1-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01F15-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01F15-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01F15-04 |
| filingDate |
2011-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2016-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fc91493eabee7ac33704ed0d70580ede |
| publicationDate |
2016-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-9448094-B2 |
| titleOfInvention |
Method of and apparatus for measuring the mass flow rate of a gas |
| abstract |
There is provided a meter ( 200; 350 ) for measuring the mass flow rate of a gas. The meter comprises a conduit ( 206 ) through which the gas flows in use. The conduit has a flow restriction orifice ( 212 ) through which choked flow occurs in use. The flow restriction orifice divides the conduit into an upstream portion ( 214 ) upstream of said orifice and a downstream portion ( 216 ) downstream of said orifice. The meter further comprises a sensor assembly ( 204 ), the sensor assembly including a piezoelectric crystal oscillator ( 218 ) in said upstream portion such that said piezoelectric oscillator is in contact with said gas when the meter in use. The sensor assembly is arranged: to drive the piezoelectric crystal oscillator such that the piezoelectric crystal oscillator resonates at a resonant frequency; to measure said resonant frequency of said piezoelectric crystal oscillator; and to determine, from the resonant frequency, the mass flow rate through the orifice. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10246379-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10654191-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9790131-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9758437-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11773019-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11773031-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10683237-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11660779-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2016280610-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10350787-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10927042-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10570064-B2 |
| priorityDate |
2010-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |