"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
|6186246||Method for adjusting drilling of drilling machine and rock drill|
A method for adjusting percussion pressure and a drilling machine. In the method the percussion power of a drilling machine is adjusted by moving a shank in the longitudinal direction of the drilling machine forwards when a smaller percussion power is to ...
|6112832||Method and apparatus for controlling a rock drill on the basis of sensed pressure pulses|
During the drilling of rock by a rock drill bit, percussive impacts are applied to the drill bit by a reciprocating piston which impacts a shank that transmits the impacts to the drill bit. Secondary pistons are provided to push the shank forwardly in res...
|4934465||Arrangement for the axial bearing of a drilling machine|
The invention relates to an arrangement for the axial bearing of the drilling machine. The drilling machine thereby comprises a body (6), a percussion device (1) fitted in the body, and a rotation bushing (3) functioning as a rotating means of a shank (2)...
|4671366||Method for optimizing rock drilling|
A method for optimizing percussive drilling, especially rock drilling, in which method the operation of the drilling device is adjusted for a desired drilling result to be obtained. According to the invention, a stress wave created in a drill rod as a res...