Roof drill bit with hexagonal body portion
Номер патента: CA1120918A
Опубликовано: 30-03-1982
Автор(ы): Kenneth C. Emmerich
Принадлежит: Fansteel Inc
Опубликовано: 30-03-1982
Автор(ы): Kenneth C. Emmerich
Принадлежит: Fansteel Inc
Реферат: ABSTRACT OF THE DISCLOSURE An improved drill bit for the mining field for use as a roof drill, tunnel drill, rock boring and high-way construction, both as a rotary and a rotary percussion drill, which includes a drill head with a diametrical slot positioning a brazed cutting blade, the head having a male drive shank to interfit with a female driver tube and hav-ing a maximum axial passage in the driver shank which opens to large fluid passages leading to chip slash openings in opposed quadrants of the drill bit. The drill head position has a hexagonal base portion above the drive shank with cir-cular guiding portions in opposed quadrants adjacent the chip slash quadrant pockets.
Drill rod, drill bit and drilling tool
Номер патента: RU2382867C2. Автор: Такаси СУЗУКИ,Масая ХИСАДА,Масахиро КОИЗУМИ. Владелец: Фурукава Рок Дрилл Ко., Лтд.. Дата публикации: 2010-02-27.