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| Number | Title | Issue Date |
| 4538858 | Apparatus for drilling and inserting a horizontal pipe A horizontal earth boring machine is disclosed of the type in which a carriage supports an engine rotatably connected to an auger, and a push ring. The carriage is movable along a set of tracks between a forward position and a rearward position. Hydraulic... | 09/03/1985 |
| 4499698 | Method and apparatus for anchoring retaining walls and the like, and installation therefor A recoverable earth-retaining wall anchoring device and method is disclosed which allows the erection of a retaining wall in a quick, inexpensive manner and permits proof-load testing of the anchor during or immediately after installation, resulting in si... | 02/19/1985 |
| 4475604 | Mobile machine for subterranean installation of piping and the like A ground supported mobile machine appropriate for subterranean installation of piping and the like has a tractor vehicle carrying a trencher driven from the tractor power source, a power operated backfill blade operated from such source to facilitate tran... | 10/09/1984 |
| 4441564 | Portable variable angle drilling machine A hole drilling machine which includes a geared stationary drill frame with a guide track to which support legs are attached at either end. A drive shaft made of hollow flexible tubing driven by a motor suspended from the guide track. An adjustable swivel... | 04/10/1984 |
| 4393945 | Rotary drill with a kelly bar and hydraulic chuck In a rotary drill having a driven rotary table with an axially directed passage through its center of rotation defined by a hollow spindle, a kelly bar, with annular shoulders, extending through the passage and a chuck mounted on the spindle, plungers are... | 07/19/1983 |
| 4340122 | Mounted drilling apparatus The drilling apparatus includes a mount in the form of a cylindrical member defining an elongated passageway and being provided with two opposite guiding rails each being formed with an elongated recessed channel communicating with the passageway; a rotar... | 07/20/1982 |
| 4105081 | Rock-drilling and bolt-setting apparatus A bolt-setting and rock-drilling apparatus has a rail which can be swung about and axis and axially displaced therealong to position a drilling carriage and a bolt-setting carriage alternately with respect to a rock wall in which the bolt is to be lodged.... | 08/08/1978 |
| 4047582 | Portable earth boring machine A portable earth boring machine for the boring of vertically inclined shafts and the insertion of pipeline casing sections characterized by a main frame portion that supports the auger drive and casing pusher apparatus, and a detachably mounted engine fra... | 09/13/1977 |
| 4042043 | Portable earth boring machine A portable earth boring machine for the horizontal boring of shafts and the insertion of pipeline casing sections in installations where excavation from the surface is undesirable. The machine is characterized by frame means adapted for movement along a t... | 08/16/1977 |
| 4039032 | Hose training means This invention relates to conduit training means and more particularly an elongated, tensioned training means for training conduits in a predetermined path.... | 08/02/1977 |
| 3977480 | Arrangement for exchanging drill bits In a drill rig, a device for exchanging a drill bit is mounted on a feed bar and is arranged movably to and from the drill axis. The bit exchanging device comprises means for holding a bit being brought thereinto non-rotatively during rotation of the dril... | 08/31/1976 |
| 3945443 | Steerable rock boring head for earth boring machines A portable earth boring machine for the horizontal boring of shafts and the insertion of pipeline casing sections in installations where excavation from the surface is undesirable. The machine is characterized by a steering head particularly adapted for r... | 03/23/1976 |
