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| Number | Title | Issue Date |
| 6832873 | Installation vehicle In order to facilitate, and largely to automate, the installation of cable supports on a duct wall, an installation vehicle can be displaced in the duct. The vehicle has a basic body which contains a storage battery and on which are mounted wheels. At least one of t... | 12/21/2004 |
| 6550544 | Rock drilling device A rock drilling device has a feed beam (1) and a rock drilling machine (2) movable along the feed beam. The rock drilling machine is fed along the feed beam (1) by a feed line (7), which is routed over a sheave (6) arranged at the movable end (5) of a pre... | 04/22/2003 |
| 6079504 | Underground mining drill rig with safety interlock A drill rig is provided which has a mobile trolley having a telescopically extendible post for locking it in position relative to the hanging wall in an underground mine. The post supports in articulated manner, at least one and generally two vertically a... | 06/27/2000 |
| 5540292 | Pneumatically actuated horizontal drilling apparatus having a plurality of drills Pneumatically actuated horizontal drilling apparatus includes a base frame with a plurality of horizontally extending drills adjustably secured thereto, and the base frame and the drills are pneumatically actuated on a selective basis. Horizontal movement... | 07/30/1996 |
| 4589499 | Horizontal drilling apparatus Apparatus for drilling horizontal holes includes a frame for holding a drill, and the frame is supported by a single wheel adjacent to the drill and dual wheels at the opposite end of the frame from the drill. A cable system is utilized for moving the dri... | 05/20/1986 |
| 4380842 | Tool support apparatus Tool support apparatus having a frame mounted on wheels and motors for driving the wheels to move the frame. A ram tube carrying different tools at its lower end supported in a cylinder mounted on an oscillator bracket which cooperates with an oscillator ... | 04/26/1983 |
| 4306626 | Hydraulic earth boring machine A hydraulic earth boring machine for forming conduit passageways beneath established surfaces such as roadways, walkways, or the like. The boring machine includes a hydraulic cylinder having an open axial passageway for receiving a boring shaft. A drive c... | 12/22/1981 |
| 4239291 | Industrial metallurgical delining assembly An industrial metallurgical delining assembly for dislodging and removing refractory or other material from upwardly open metallurgical process vessels. The assembly includes a spider-leg frame, the feet of which are supported on the upper periphery of th... | 12/16/1980 |
| 4222687 | Apparatus for boring sewer pipe opening in manhole base Apparatus for boring a sewer pipe opening in the side wall of a concrete manhole base including a supporting frame adapted to be positioned over the open end of a vertically disposed manhole base. A second frame is suspended from the supporting frame and ... | 09/16/1980 |
| 4098538 | Earth working machine having independent tools and roof engaging bridge A mobile earth working machine has a tracked base on which various tools such as an impactor hammer and a side delivery bucket are mounted on separate booms. To permit two or more tools to be used simultaneously, while tunnelling, a locking or clamping ar... | 07/04/1978 |
| 3980342 | Auger type mining machine An auger type mining machine in which the rotational torque necessary to do the mining is supplied separately and independently from the force required to advance the auger, and is provided by a motor having a stator portion insulated from, secured to and... | 09/14/1976 |
| 3965997 | Method and apparatus for guiding and sealing a drill string A method and apparatus for guiding and sealing a drill string during drilling. The drill string is formed with an increased diameter at the portions where two adjacent rods are connected. The guiding and sealing of the rods is maintained by means of hydra... | 06/29/1976 |
