| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c60cbeb32859b75d089103559c856e48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_659b8049f15cb0c33282aab36fddc026 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F16L15-002
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B17-0423
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F16L15-06 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B17-042
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F16L15-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F16L15-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F16L25-00 |
| filingDate |
2013-09-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2018-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_70ed366246ab0e43cb8e4a85f0c2d14e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_163fe5931a767de77fe5d5976b63fb6f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b3df7d92871309a1f8d0dada796fe48c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a8def40b6ec9fb4794c9533819f76455 |
| publicationDate |
2018-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-10077612-B2 |
| titleOfInvention |
Screw joint for steel pipe |
| abstract |
In a screw joint for a steel pipe, a taper angle of a tapered surface of a pin is substantially the same as a taper angle of a tapered surface of a box. In addition, the pin and the box interfere with each other in a radial direction while a seal surface of the pin and a seal surface of the box contact each other in a process of make-up between a male screw portion and a female screw portion, and at least apart of the seal surface of the pin comes into close contact with at least a part of the seal surface of the box over the entire circumference. Moreover, a contact pressure amplification mechanism, which increases a contact pressure between the seal surface of the pin and the seal surface of the box at the completion of the make-up, is further provided. |
| priorityDate |
2012-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |