首页>
外国专利>
A drilling tool, a self-drilling rock bolt, a drill bit, an ancoring device for a self-drilling rock bolt, a shaft for a drilling tool and an end coupling
A drilling tool, a self-drilling rock bolt, a drill bit, an ancoring device for a self-drilling rock bolt, a shaft for a drilling tool and an end coupling
展开▼
机译:钻具,自钻锚杆,钻头,自钻锚杆的锚固装置,钻具的轴和端部联接器
展开▼
页面导航
摘要
著录项
相似文献
摘要
A drilling tool (10) incorporating first and second ends, a shaft (13, 90) extending between the ends. The first end has a drill bit (15) to penetrate rock. The drill bit and the shaft have complementary threads. The drill bit and the shaft comprise a relative rotation stop means (82, 83) that ensures that the drill bit remains loose during drilling in a first direction. The invention further relates to a self drilling rock bolt (10), a drill bit (15), drill shaft (13,90) and shaft coupling (94), an anchoring device (23), and an end coupling (95) per se.
展开▼