A rock drill actuated solely by a liquid medium under pressure comprises a hydraulic motor for rotating the drill steel and another hydraulic motor for applying axial blows to drill; said motors are hydraulically connected in series, with a valve regulator inserted in the supply circuit upstream of the rotational motor. The striker motor is supplied with liquid both from the outlet of the rotational motor and from an additional source of fluid under a pressure equal to the outlet pressure of sai...

A rock drill having a head body, a sleeve fixed to the inside of the head body, a drilling tool attached with a bit to one end thereof and slidably and rotatably engaged with the sleeve, a main body connected to the head body, a hydraulically operated drill hammering means for imparting reciprocal movement to said tool, a drill rotating means for rotating the tool, and an air blast means for blasting air from the tool to remove the crushed rocks around the tool. Since hydraulic liquid can be uti...

A rock drill and more particularly an independent rotation rock drill assembly having an improved method and apparatus for initiating reciprocable movement of the piston thereof.

A saw structure has a frame with a table translatable into a blade and movable transverse the blade. An upper carriage is rotatable relative the blade. The blade is supported on an arm to overhang the carriage. The saw structure cuts rocks and stones with precision.

A wedging ring carried in a groove in a bowl jams thread segments against a threaded portion of a bowl carrier which is pressed against a hardened ring by a frictional overload clamp. In turning the bowl relative to the bowl carrier, a manual, automatic or partially automatic drive actuates a pawl and ratchet drive. The crusher head supports an annular mantle held by a wedging ring and a self-tightening nut.

A rock tumbler for rotating a tumbling barrel containing rocks and a grinding and polishing medium. The rock tumbler includes a chassis having a pair of spaced walls that define a tumbling compartment and a pair of spaced shafts extending across the compartment that are rotatably mounted in bearings. The bearings are fitted in slots in the walls in such a manner that the bearings may be removed from the walls by raising them in slots. A cover fitted on the chassis has an opening that receives a ...

A drill for rock comprising a boring head arranged on one end of a drill shank and having radially projecting wings, an axial centering projection which projects in a boring direction in front of the wings, said wings and said projection constituting carriers of eccentrically arranged cutter bodies and a centering cutter body, respectively. Breaker surfaces are formed on the wing surfaces between the cutter bodies, respectively, pointing to the centering point of the centering cutter body. Each ...

Rock crusher comprising a rotor on which hammers are pivotally mounted between claws or plowshares which are transversely aligned on a frame 1 mounted on two wheels, the height of which is adjustable. The crusher is provided with a drawbar (15) for attaching it to a tractor, and the rotor (4) is also mounted on the frame and connected to a longitudinal drive shaft carried by the drawbar (15). A coupling is provided to connect the rotor to a power takeoff carried by the tractor.

Knife edged cutting members on the conical face and cylindrical side of a rotating drilling head shear slivers of rock by exceeding the tensile strength of the formation being penetrated. Fluid such as air, water, or drilling mud, injected through ports in debris channels between cutting members direct such slivers and other debris upwardly for scouring the bottom of the hole to minimize debris interference with knife edge action. Cutting members are made from a very hard composition such as tit...

A mobile vehicle for distributing bulk materials such as rock dust and the like which includes hopper means for receiving bulk material and distributor means including conveying means for conveying the bulk material out of the hopper and spreader means for receiving material from the conveying means and distributing the received material outwardly from the vehicle. The distributor means may be operable to vibrate the hopper in a manner to facilitate clean feed out of the hopper. The distributor ...