http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H10140960-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3107d5e69a508fbf1914878ddcb53a56 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B10-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B10-00 |
| filingDate | 1996-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2f79c5eeaf480b38525c0972f1b93369 |
| publicationDate | 1998-05-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H10140960-A |
| titleOfInvention | Drill bit for drifter drill |
| abstract | (57) [Summary] (Modifications required) [Problem] Hard rock or rocks with boulders interposed Improve construction performance to enable continuous drilling for a long time. SOLUTION: A cutting tip 2 is buried in this space by providing a slit 3 at a tip of a bit base 1 and protecting the end of the tip, and has a bit tip structure for preventing the tip from falling off or being damaged due to the rotational movement. Then, the internal structure of the bit base into which the milling enters is (1) One point of the blow hole tip, (2) By changing the blowhole volume in three stages, there is an effect that the powder is easily discharged to the outside of the bit by the blowing pressure. The volume change rate is defined by the ratio to the bit apparent diameter. In particular, the volume and the length of the second stage are 80-90% and 50-80% of the bit apparent diameter, respectively, with respect to the bit apparent diameter. Is in the range of The effect was obtained. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2011069150-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2009097145-A |
| priorityDate | 1996-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.