Ronald W Mills

US Patent:

46608907, Apr 28, 1987

Filed:

Aug 6, 1985

Appl. No.:

6/762928

Inventors:

Ronald D. Mills - Anaheim CA

International Classification:

E21C 2512
E21C 3518

US Classification:

299 79

Abstract:

A rotatable cutting bit shield and method and apparatus for attaching the shield onto cylindrical cutting bit shafts uses an annular metal ring having the shape of an inverted dish, and a centrally located hole through the ring. The diameter of the hole is initially larger than the diameter of the cutting bit shank. Compressive pressure exerted on the annular upper and lower faces of the ring by the apparatus according to the method causes the ring to deform into a flatter, more disc-shaped structure. This deformation causes the diameter of the central hole in the ring to shrink, captivating the ring axially between larger diameter annular flanges on the cutting bit shank.

US Patent:

61966363, Mar 6, 2001

Filed:

Mar 22, 1999

Appl. No.:

9/274451

Inventors:

Ronald D. Mills - Yorba Linda CA
Larry J. McSweeney - South Point OH
Lawrence H. McSweeney - South Point OH

International Classification:

E21C 35183

US Classification:

299111

Abstract:

A cutting tool configuration includes a cutting bit insert configured in the shape of an octagonal pyramid. The cutting bit insert includes a number of portions, each of which has faces which slope at different angles with respect to the longitudinal axis of the cutting bit insert. The cutting bit insert also includes a flange which is surrounded by a ring. The ring is softer than the cutting bit insert.

US Patent:

49327232, Jun 12, 1990

Filed:

Jun 29, 1989

Appl. No.:

7/372867

Inventors:

Ronald D. Mills - Anaheim CA

International Classification:

F21C 3518

US Classification:

299 86

Abstract:

A shield for improving the wear resistance and life of holding support blocks for cylindrical carbide-tipped cutting bits used in drum pulverizer and wheel machines of the type used for pulverizing and cutting refractory materials is disclosed. The shield includes a short cylindrical metal container having a bottom annular wall supporting a coaxial central tube section. The annular space between the tube and inner surface of the cylindrical wall of the container contains and is hard brazed to solid tungsten carbide segments in the shape of sectors of a flat annular ring whose upper surface is parallel to the upper annular wall surface of the outer cylindrical wall of the container. The bore of the central tube is adapted to receive the shank of a cutting-bit, and the bottom wall of the cylindrical container of the shield is welded to the face of a cutting-bit holding block, with the bores of holding block and tube aligned, to permit insertion and removal of cutting bits into the bore of the holding block. In the preferred embodiment, the upper end of the tube is coined to flare radially outwards and downwards over the inner circumferential edges of the carbide segments, retaining the segments in place in the container.

US Patent:

48234540, Apr 25, 1989

Filed:

Apr 10, 1987

Appl. No.:

7/036789

Inventors:

Ronald D. Mills - Anaheim CA

International Classification:

B23P 1102

US Classification:

29437

Abstract:

A rotatable cutting bit shield and method and apparatus for attaching the shield onto cylindrical cutting bit shafts uses an annular metal ring having the shape of an inverted dish, and a centrally located hole through the ring. The diameter of the hole is initially larger than the diameter of the cutting bit shank. Compressive pressure exerted on the annular upper and lower faces of the ring by the apparatus according to the method causes the ring to deform into a flatter, more disc-shaped structure. This deformation causes the diameter of the central hole in the ring to shrink, captivating the ring axially between larger diameter annular flanges on the cutting bit shank.

US Patent:

51350351, Aug 4, 1992

Filed:

Mar 1, 1991

Appl. No.:

7/663578

Inventors:

Ronald D. Mills - Anaheim CA

International Classification:

B23G 1300

US Classification:

144241

Abstract:

An improved cutting bit and associated holding block assembly for use on rotary wheel, chain or rotor cutters of the type having a plurality of cutting bits projecting outwards from the periphery of the wheel, chain or rotor and used to cut tree stumps or other hard or refractory materials includes individual holding blocks which each rotatably support within a bore therewithin a separate cylindrical cutting bit. The bore is canted inwards with respect to a radius of the wheel, chain or rotor, thus causing the outermost portion of a rotatable bit held in the bore to contact a surface to be worked at a negative top rake angle as the bit is rotated into contact with the work surface. The negative top rake angle advantageously provides clearance for chips severed by the bit. However, the dihedral angle between the outer transverse wall surface of the circular cutting bit tip and its outer tapered side wall is sufficiently acute as to present an effectively sharp angle between the cutting edge of the tip and the surface being worked.