Combination bit for coking oven

Details Combination bit for coking oven Combination bit for coking oven

1988-12-30

1990-05-08

Kisliuk, Bruce M.

Boring or penetrating the earth

Bit or bit element

Adjustable cutter element

175385, 175424, 1510405, 134 24, 134 39, 134167R, 202241, 239247, 239248, 239587, 239DIG13, B08B 904, C10B 4302, E21B 718

Patent

active

049230212

ABSTRACT:
A combination bit for both drilling a pilot hole and cutting coke from a coking drum. A manually operable flow divider/diverter valve permits a single workman to quickly and easily change from pilot hold drilling mode to cutting mode without having to change bits.

REFERENCES:
patent: 2217360 (1940-10-01), Court
patent: 2218130 (1940-10-01), Court
patent: 2245554 (1941-06-01), Court
patent: 2245575 (1941-06-01), Court
patent: 2254848 (1941-09-01), Holveck
patent: 2306926 (1942-12-01), Allen
patent: 3645346 (1972-02-01), Miller et al.
patent: 3880359 (1975-04-01), Novy
patent: 4611613 (1986-09-01), Kaplan
patent: 4826087 (1989-05-01), Chinery

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