Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Patent
1989-07-25
1990-12-04
Novosad, Stephen J.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Floor-working
30390, 83100, E01C 2309, E21C 3522
Patent
active
049749072
ABSTRACT:
This invention discloses a pneumatic cutter for concrete and the like in which: a suction pipe is provided on a circular arc-shaped case covering the upper half of a disk cutter member driven by air motor incorporated in a body, and a venturi section and an exhaust cylinder are provided in connection to the suction pipe in a row; a valve and a branched pipe are provided in connection to an air hose coupling cylinder in order, and in which a larger pipe of the branched pipe is connected to the air motor while a smaller pipe is connected to the venturi section; and an exhaust port of the air motor is provided on the body, and an exhaust nozzle which is provided on a surface where the circular arc-shaped case faces to the disk cutter member and the exhaust nozzle are connected to each other through a communicating passage.
REFERENCES:
patent: 3572841 (1969-01-01), Rhodes
patent: 3882598 (1975-05-01), Earle et al.
patent: 4063478 (1977-12-01), Stuy
patent: 4241505 (1980-12-01), Bodycomb, Jr. et al.
patent: 4253362 (1981-03-01), Olson
patent: 4255995 (1981-03-01), Connor
patent: 4414743 (1983-11-01), Pioch et al.
patent: 4516807 (1985-05-01), Eagles
Fuji Kuuki Kabushiki Kaisha
Kabushiki Kaisha Koumu
Novosad Stephen J.
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