Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Tooth mounted on helical head portion or head with helical...
Patent
1978-06-16
1980-03-25
Pate, III, William F.
Mining or in situ disintegration of hard material
Cutter tooth or tooth head
Tooth mounted on helical head portion or head with helical...
175377, 299 87, E21C 3518
Patent
active
041947916
ABSTRACT:
The specification discloses an insert tipped tool bit having grooves formed on the longitudinal periphery of the bit in the parent material supporting the insert and a method of reducing erosion of the insert supporting parent material by forming grooves on the longitudinal periphery of the tool bit and sizing and spacing the grooves so that earth fines can pack in the grooves and create a boundary layer of earth fines around the parent material.
REFERENCES:
patent: 1143271 (1915-06-01), Hughs
patent: 2177332 (1937-10-01), Reed
patent: 2528300 (1950-10-01), Degner
patent: 2738965 (1956-03-01), McCarthy
patent: 3361481 (1968-01-01), Maddock
patent: 3652130 (1972-03-01), Elde
patent: 3915246 (1975-10-01), Sheshtawy
Montgomery, Jr. Robert H.
Oaks Seibert S.
Burns Lawrence R.
Kennametal Inc.
Pate III William F.
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