Fire escape – ladder – or scaffold – Having transpositioning base and erecting means – Telescopic erecting means
Patent
1985-06-07
1986-09-23
Schwartz, Larry I.
Fire escape, ladder, or scaffold
Having transpositioning base and erecting means
Telescopic erecting means
52645, 182 47, 182159, E21F 1712
Patent
active
046128484
ABSTRACT:
A compact, collapsible and automatically expansible mining canvas is constructed and arranged so that a mine worker may stand under a supported roof section and extend into a newly sumped coal portion a forward section of a mining canvas so as to direct the air flow across the face of a newly mined coal section so as to remove any dangerous gasses and debris escaping therefrom. The mining canvas comprises an upper support and a lower support connected by pivotal intermediate support members and a canvas which is connected there between and which is preferably pleated so as to allow collapsible and expansible operation. Included in this invention is the method by which a miner may stand under an already supported section and extend to within a few feet of the newly mined or sumped face a compact, collapsed but expansible canvas section that is easily transportable to the face and which upon expansion will engage the roof and floor of the mine so as to direct the air flow against the face.
REFERENCES:
patent: 3863554 (1975-02-01), Boyd
patent: 4282802 (1981-08-01), Divers
patent: 4463829 (1984-08-01), Grin
Advanced Air Systems
Burns Lawrence R.
Schwartz Larry I.
LandOfFree
Method and apparatus for moving air across a mineral face does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for moving air across a mineral face, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for moving air across a mineral face will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-759799