| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8fc0668fd5cbfe23cea7d9bdd5de932a |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S417-01 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F04B25-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F04B39-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F04B39-102
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F04B37-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F04B39-04 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F04B39-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F16J9-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F04B53-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F04B53-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F04B39-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F04B25-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F16J9-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F04B37-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F04B39-10 |
| filingDate |
1982-08-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0de64ee288d6c09e48daac846ae0ae20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4d9db0a5c983ef191f8d1a22fe6509d0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4858390e3b2344711cf02182e2f47db8 |
| publicationDate |
1983-02-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-8300539-A1 |
| titleOfInvention |
Reciprocatory piston and cylinder machine |
| abstract |
A reciprocating piston and cylinder machine particularly suitable for use as a vacuum pump comprises a cylinder (17), a cylindrical piston (16) reciprocatingly slidable inside the cylinder (17), and means for substantially sealing the annular space between the piston (16) and the cylinder (17) in place of oil or other liquid lubricant. The sealing means comprises a sleeve (102) composed of a low friction material subjected to tension applied circumferentially, and preferably also longitudinally, to the cylindrical surface of the piston (16). A reciprocating differential piston and cylinder machine of particular prior construction having a one-way valve (42) in an exhaust port (30) on the front of a head portion (24) of the piston (16) is also described. The assembly is such that as the inner face (28) of the piston head portion (24) approaches the cylinder end face (52), the front face (28) physically moves the one-way valve ( 42) so as to open the exhaust port (30). |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9809080-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0280264-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0280264-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106030103-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106030103-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2310464-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2637654-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4560327-A |
| priorityDate |
1981-08-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |