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Record Details

Record 56 of 6194
Mechanical Coal-Face Fracturer
Author and Affiliation:
Collins, E. R., Jr.(Caltech)
Abstract: Radial points on proposed drill bit take advantage of natural fracture planes of coal. Radial fracture points retracted during drilling and impacted by piston to fracture coal once drilling halts. Group of bits attached to array of pneumatic drivers to fracture large areas of coal face.
Publication Date: Apr 01, 1984
Document ID:
19830000419
(Acquired Nov 04, 1995)
Accession Number: 83B10419
Subject Category: MACHINERY
Report/Patent Number: NPO-15847
Document Type: NASA Tech Brief
Publication Information: NASA Tech Briefs (ISSN 0145-319X); 8; 1; P. 107
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: BORING MACHINES; COAL; DRILL BITS; MINES (EXCAVATIONS)
Availability Source: National Technology Transfer Center (NTTC), Wheeling, WV
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