Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Tooth mounted on helical head portion or head with helical...
Patent
1989-06-29
1990-06-12
Massie, Jerome W.
Mining or in situ disintegration of hard material
Cutter tooth or tooth head
Tooth mounted on helical head portion or head with helical...
299 91, F21C 3518
Patent
active
049327232
ABSTRACT:
A shield for improving the wear resistance and life of holding support blocks for cylindrical carbide-tipped cutting bits used in drum pulverizer and wheel machines of the type used for pulverizing and cutting refractory materials is disclosed. The shield includes a short cylindrical metal container having a bottom annular wall supporting a coaxial central tube section. The annular space between the tube and inner surface of the cylindrical wall of the container contains and is hard brazed to solid tungsten carbide segments in the shape of sectors of a flat annular ring whose upper surface is parallel to the upper annular wall surface of the outer cylindrical wall of the container. The bore of the central tube is adapted to receive the shank of a cutting-bit, and the bottom wall of the cylindrical container of the shield is welded to the face of a cutting-bit holding block, with the bores of holding block and tube aligned, to permit insertion and removal of cutting bits into the bore of the holding block. In the preferred embodiment, the upper end of the tube is coined to flare radially outwards and downwards over the inner circumferential edges of the carbide segments, retaining the segments in place in the container. Preferably, the entrance bore of the tube is tapered to form a rotational bearing surface for the tapered lower annular flange of a cutting-bit.
REFERENCES:
patent: 3512838 (1970-05-01), Kniff
patent: 3778112 (1973-12-01), Krekler
patent: 4489986 (1984-12-01), Dziak
patent: 4660890 (1987-04-01), Mills
patent: 4818027 (1989-04-01), Simon
patent: 4844550 (1989-07-01), Beebe
Bagnell David J.
Chapin William L.
Massie Jerome W.
LandOfFree
Cutting-bit holding support block shield does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cutting-bit holding support block shield, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cutting-bit holding support block shield will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-612193