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JPS5576290U |
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JPS5568993A |
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JPS5561695A |
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JPS5517007Y2 |
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JPS5514236B2 |
1370160 Boring earth &c ROBBINS CO 18 Oct 1972 [20 Oct 19711 48044/72 Heading ElF In a drill comprising a main frame 12, guide columns 18 upstanding on the main frame, a cross frame 22 movable along the columns, jacks 41 between the fram...
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JPS5514239B2 |
1419258 Boring earth &c MASCHINENFABRIK RUDOLF HAUSHERR & SOHNE KG 14 Dec 1972 [15 Dec 1971] 57636/72 Heading E1F An automatic earth drilling apparatus comprises a vehicle 1 having a mast 2, a sliding head 3 carrying a drill motor 4 and ...
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JPS5514235B1 |
A traveling support frame is mounted for up and down travel along upstanding guide columns. Drilling equipment is carried by the traveling frame. The drilling equipment includes a drive head and means coupling it to a rotary drive member...
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JPS5513270B2 |
A rotary drill rig includes an elongated mast, a pulldown head disposed for linear traversal along the mast and connected to mechanism for effecting pulldown and hoisting movements on a drill string, and a rotary drive unit adapted to be...
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JPS5544894U |
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JPS559991B2 |
A shaft drilling machine generally includes a pivotable power swivel supported on a drilling assembly moved along a mast by hydraulic cylinders. Improved means for positioning the mast include a screw jack assembly with one end adapted t...
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JPS557911B2 |
A hydraulic rock drill having a hydraulic drill drive motor, a hydraulic feed motor, and a hydraulic impact unit and associated pumps for supplying hydraulic fluid under pressure and provided with an automatic control system including a ...
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JPS5524377U |
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JPS5520830U |
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JPS557891U |
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JPS551438B1 |
1380241 Percussive tools SKANSKA CEMENTGJUTERIET AB 9 Dec 1971 [11 Dec 1970 21 April 1971] 57320/71 Heading B4C [Also in Division G3] A system for automatically aligning at least one feed beam 4 of a rock drilling machine to a desired be...
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JPS5432255B1 |
The drill head of a raise drill is mounted to allow pivoting in one or more planes. Bending forces on the drill string and raise drill components are reduced, eliminated or controlled. An indicator provides the operator with information ...
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JPS54143302U |
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JPS54143303U |
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JPS5428265Y2 |
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JPS54101701A |
Rotary and axial forces are transmitted through a chuck to a rotary drill string. The chuck clampingly engages the drill string to transmit rotary and axial forces. A multiplicity of jaw elements in the chuck contact the drill string. Th...
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JPS5419203B2 |
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JPS5419202B2 |
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JPS5419201B2 |
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JPS5418641B2 |
A frame arranged to traverse a mast on a rotary drill apparatus for exerting an axial feed or pulldown force on a drill pipe and bit assembly and characterized by a pair of rotatable shafts each having two spaced apart pinions mounted th...
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JPS5477203A |
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JPS5414722Y2 |
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JPS5412881B2 |
A rotary table drive for a blasthole drill has a pair of roller elements pivotally mounted in a table bushing and engageable with cooperative longitudinal flat sided recesses formed on the exterior of a heavy walled cylindrical drill pip...
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JPS5410321B2 |
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JPS548081Y2 |
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JPS5447310A |
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JPS5448003U |
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JPS545762Y1 |
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JPS5438101U |
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JPS5434301U |
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JPS5427203A |
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JPS5340161B2 |
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JPS5336321Y2 |
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JPS5336322Y2 |
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JPS5364902A |
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JPS5367302U |
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JPS5316601B2 |
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JPS5351401U |
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JPS5347301A |
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JPS5311921B2 |
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JPS537881B2 |
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JPS5328001A |
A square hole drill having a cutterhead configuration whose outline is in the form of a Reuleaux triangle and which also has a planetary gear drive. Two counter revolving motions are present in the drill at the same time. One is the pure...
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JPS538001Y2 |
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JPS5319604A |
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JPS534323B2 |
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JPS532244B2 |
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