Clutch mechanism for use in a power-driven tool

Compressed air tool

Compressed-air screw or bolt tightener, especially an impulse or

Compressed-air screwdriver with shutoff bypass means

Computer aided anti-buckling device for mine roof bolting machin

Concrete drop hammer attachment device

Construction of underground dams and equipment therefor

Control system for a rock drill

Control system for an internal combustion engine using either ga

Control system for percussion drill

Controls for hydraulic percussion drill

Damper pressure control apparatus for hydraulic rock drill

Device and method for installing ducts in holes produced by soil

Device for introducing additional air into intake passage leadin

Device for limiting a torque to be transferred

Device for sensing the direction of rotation of a hand tool...

Device for soil sampling under water

Device for the production of earth holes

Directional valve means for positioning machine units

Discontinuous tightening wrench comprising means for...