| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8650e04ba933702625238a35c76f2495
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e7ec59a874b46efcc8f948e7b1641d3c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a200cc76ababde2fea9a528c5ce35d28 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N2291-02818 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N29-036
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N33-2888 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N33-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N29-036 |
| filingDate |
1997-06-27^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c23b3ee2071aaa556f916fd9de3d94d8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_40fd924409c98838945c913a14ede9a7 |
| publicationDate |
1998-01-15^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-9801739-A2 |
| titleOfInvention |
In situ oil quality evaluation with an acoustic sensor |
| abstract |
An acoustic sensor (52) is disclosed to detect quality of oil or a lubricating liquid resident in a machine (30). The acoustic sensor (52) may include a piezoelectric element (56) configured as a resonator to indicate a change in the property of an oil or lubricating liquid as a function of resonant frequency. Such a sensor (52) may be positioned in an engine (32) having a lubrication system (40) and coupled to a signal processor (62) to provide an indication of when the lubricant has degraded to an extent requiring replacement. Processor (62) may be part of a monitoring system (60) including an output device (66) to provide the indication. In further aspect, sensor (52) is employed to detect viscosity of oil or another liquid residing in a machine in situ. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8732938-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10139375-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2000706-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10260388-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2000706-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2020231728-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-3978920-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2018102036-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7114373-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7254990-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105445149-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7721590-B2 |
| priorityDate |
1996-06-27^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |