Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1980-09-08
1982-11-16
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175372, 308 82, E21B 1022
Patent
active
043591132
ABSTRACT:
An earth boring bit particularly for use in drilling mining blast holes, has features for reducing the possibility of cutter drag and reducing wear on the bit legs. The bit is of the type having three bit legs, a bearing pin depending from each bit leg, and a cutter with a central cavity mounted on each bearing pin with roller bearings. The roller race for the roller bearings is formed in the central cavity of the cutter. The lower side of each bearing pin commences at the outer side of each bit leg, eliminating the shirttail flange. Clearances are provided between the central cavity and the bearing pin at the backface for the discharge of air in a direction parallel with the bearing pin axis.
REFERENCES:
patent: 1905079 (1933-04-01), Wellensiek et al.
patent: 2025261 (1935-12-01), Zublin
patent: 2076000 (1937-04-01), Reed
patent: 2147927 (1939-02-01), Scott
patent: 2194675 (1940-03-01), Sanders et al.
patent: 2297192 (1942-09-01), Reed
patent: 2673128 (1954-03-01), Reed
patent: 2690935 (1954-10-01), Alexander
patent: 2774571 (1956-12-01), Morlan
patent: 2815936 (1957-12-01), Peter et al.
patent: 3303898 (1967-02-01), Bercaru
patent: 3307645 (1967-03-01), Hildebrandt
patent: 3990525 (1976-11-01), Penny
patent: 4098358 (1978-07-01), Klima
patent: 4102419 (1978-07-01), Klima
patent: 4194794 (1980-03-01), Kling
patent: 4211453 (1980-07-01), Johansson
patent: 4249622 (1981-02-01), Dysart
patent: 4253710 (1981-03-01), Goodman
Bradley James E.
Falk Joseph
Felsman Robert A.
Hughes Tool Company
Novosad Stephen J.
LandOfFree
Earth boring bit with extended gage does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Earth boring bit with extended gage, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Earth boring bit with extended gage will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1433055