1
Carl Laurent Lichte: Unitized rotary rock bit. Dresser, Eddie E Scott, October 26, 1976: US03987859 (73 worldwide citation)

A rotary rock bit is formed from at least two individual segments. The individual segments are positioned together and aligned in the proper position for the final assembled bit. The seams between the individual segments are in the form of square-butt type joints and the adjoining segments have surf ...


2
Carl L Lichte: Unitized rotary rock bit. Dresser, Fred A Winans, Eddie E Scott, October 21, 1980: US04229638 (71 worldwide citation)

A rotary rock bit is formed from at least two individual segments. The individual segments are positioned together and aligned in the proper position for the final assembled bit. The seams between the individual segments are in the form of square-butt type joints and the adjoining segments have surf ...


3
Lichte Carl L: Trepan tournant monobloc pour le forage dans le roc, Unitized rotary rock bit. Dresser, February 13, 1979: CA1048488

Abstract of the Disclosure A rotary rock bit is formed from at least two individualsegments. The individual segments are positioned together andaligned in the proper position for the final assembled bit. Theseams between the individual segments are in the form of square-butt type joints and the adjo ...