Cutter head for pit-boring machine

Patent · Tue May 15 04:00:00 EDT 1984

OSTI ID:6506149

Ishikawa, Y; Ajiro, S; Wada, M

A rotatable cutter head for a pit boring machine used in reverse circulation drilling. The cutter head has cutter arrays including rotary cutters and drag cutters and disposed radially and circumferentially spaced positions on the cutter head, the drag cutters having the cutting ends lying generally in a conical plane having the axis coaxial with the axis of rotation of the cutter head. The rotary cutters each have cutting teeth around the circumference thereof and each tooth has an inclined side face lying in a further conical plane the central axis of which is coaxial with the axis of rotation of the rotary cutter, the inclined side face of each tooth facing generally along the inclination of the conical plane in which the cutting ends of the drag cutters lie, and the tip of each cutting tooth of each rotary cutter projecting beyond the plane in which the cutting ends of the drag cutters lie.

• Assignee: Hitachi Construction Machinery Co., Ltd. (Japan)
• Patent Number(s): US 4448269
• OSTI ID: 6506149
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
BUILDINGS
CONSTRUCTION
CUTTING TOOLS
DESIGN
DRILLING
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
FOUNDATIONS
INCIDENCE ANGLE
MACHINE PARTS
MECHANICAL STRUCTURES
MOTION
ROCK DRILLING
ROTARY DRILLS
ROTATION
SHAFTS
SUPPORTS
TOOLS