Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2005-08-23
2005-08-23
Kreck, John (Department: 3673)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S428000, C175S379000
Reexamination Certificate
active
06932172
ABSTRACT:
Cutter elements including pointed contact structures and elements, and rock tools or bits for carrying those elements, for chipping, cutting, and breaking non-ductile materials are disclosed. The cutter elements, the ends of which directly contact and cut through rock and other materials, have tapered contact structure ends which are flatter than those known to the prior art, obtaining increased durability. The contact elements which may be part of the contact structures are selected of materials having hardness and other characteristics in relation to those of the mounting structures, including the tapered and projecting portions, which also add durability and wear-resistance to the elements. Fixed, replaceable, and rotatable cutter elements are disclosed. Rock tools including bits are also disclosed for carrying the cutter elements, having sockets for threaded or rotatable cutter elements arranged in straight or curved rows on the head opposite the drill-string-engaging base of the tool. The tool also has radially-extending buttresses which help to protect the cutter elements from damage as the drill string and head is withdrawn from a bore.
REFERENCES:
patent: 3075593 (1963-01-01), Holsing
patent: 3807804 (1974-04-01), Kniff
patent: 4148368 (1979-04-01), Evans
patent: 4199035 (1980-04-01), Thompson
patent: 4339009 (1982-07-01), Busby
patent: 4384737 (1983-05-01), Reusser
patent: 4570726 (1986-02-01), Hall
patent: 4595067 (1986-06-01), Drake
patent: 4813501 (1989-03-01), Mills et al.
patent: 4838366 (1989-06-01), Jones
patent: 4854405 (1989-08-01), Stroud
patent: 5098167 (1992-03-01), Latham
patent: 5248006 (1993-09-01), Scott et al.
patent: 5678645 (1997-10-01), Tibbitts et al.
patent: 5732784 (1998-03-01), Nelson
patent: 6283234 (2001-09-01), Torbet
Undated catalog pp. 3-5, 7-12, and 14 showing bits and blocks. A trademark K (stylized) appears on each page.
Undated catalog p. 15 showing drilling products. A trademark K (stylized) appears on the page.
Undated catalog pp. 12-17 showing conical cutter bits of various sizes. A trademark K (stylized) appears on some pages.
Undated catalog p. 18 showing soil stabilization tooling.. A trademark K (stylized ) appears on the page.
Undated , unnumbered catalog page or advertisement showing crusher/feeder breaker tooling.
Brown, Jr. Edward L.
Kreck John
LandOfFree
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