| Patent Number |
Title Of Patent |
Date Issued |
| 4516467 |
Method and apparatus for controlling a rotary percussive hydraulic drill |
May 14, 1985 |
| A quick changeover hydraulic circuit for use in an auger drive mode or percussion hammer mode, controllable in each mode by the same flow regulator. The circuit comprises a first branch circuit which powers a first auxiliary hydraulic powered device and a hydraulic motor for drill st |
| 4460294 |
Toggle type temporary roof support for mining machinery |
July 17, 1984 |
| A temporary roof support comprising a boom pivotally mounted and positioned on the front of the mining vehicle. A temporary roof support jack is pivotally mounted to the front of said boom. The jack comprises a base structure secured to the boom and extending laterally thereof. The base |
| 4426284 |
Filter condition indicator |
January 17, 1984 |
| A filter comprising a filter head, a canister secured to the filter head and a tubular filter within the canister. The filter head has inlet and outlet ports for connecting into a hydraulic conduit. A first passage normally delivers fluid from the inlet port to the outer cylindrical |
| 4325824 |
Unhooking dirty filter alarm |
April 20, 1982 |
| An unhooking dirty filter alarm for a filter comprising a filter head, canister and tubular filter element. The filter head has a bypass valve therein. Linkages to the outside of the filter element rotate a pointer indicating whether or not the filter element has been bypassed. The l |
| 4311347 |
Drill steel guide |
January 19, 1982 |
| A drill steel guide or clamp for use with mine roof drilling and bolting machines which guides and clamps the drill steel relative to a standard but which can be kicked out of the way by the advancing drill pod after which time the guide is no longer required for the particular bolt hole |
| 4290490 |
Roof bolting device |
September 22, 1981 |
| A roof drilling and bolting device comprising a mobile chassis and two cabs mounted to the front of the chassis for independent transverse (outward to the side) movement. The cabs have floors and protective canopies. Extensible hydraulic devices position the cabs outwardly of the chassis |
| 4256186 |
Roof drilling and bolting apparatus |
March 17, 1981 |
| An operator cab and drilling assembly for a roof drilling and bolting device. The cab comprises a floor and a canopy having extensible hydraulic means for adjusting the distance between the cab floor and at least the front edge of the canopy. A horizontal rail extends along the entire |
| 4252475 |
Vehicle mounted temporary roof support |
February 24, 1981 |
| A temporary roof support for mounting to a mining vehicle comprising a boom pivotally mounted to the vehicle and positioned in front thereof for rotation in a vertical plane and an extensible standard pivotally mounted to the front of said boom. An extensible hydraulic device secured at |
| 4250975 |
Cab mounting for mining machine |
February 17, 1981 |
| A system for mounting two operator cabs to a vehicle chassis for transverse extension. At least one large tube is mounted to the vehicle with its axis pointed in the direction of the operator cab movement. Two smaller tubes of different diameters telescopically engage the large tube and |
| 4011795 |
Impact tool |
March 15, 1977 |
| A hydraulic impact tool wherein hydraulic power is used to lift a ram against a bias to store energy and wherein the ram then is permitted to accelerate toward an impliment to which it imparts energy upon impact. A reciprocating cylindrical sleeve slidable about the ram is arranged to |
