|
US4463973A
|
|
Sealed hinge
|
|
US4445663A
|
|
Rotating device for drill mast
|
|
US4310197A
|
|
Mining and bolting method and apparatus
|
|
US4328994A
|
|
Mining apparatus and method
|
|
US4172615A
|
|
Roof bolting apparatus
|
|
US3966257A
|
|
Driving arrangement for rotary mining heads of mining machines
|
|
US3899893A
|
|
Anchoring pin and method for structures such as mine and tunnel roofs and side walls
|
|
US3844618A
|
|
Mining machine having rotary motor extended cutter head
|
|
US3874735A
|
|
Mining machine
|
|
US3832930A
|
|
Pins for mine and tunnel roofs and other structures
|
|
CA967769A
|
|
Machine for driving mine roof pins
|
|
US3817579A
|
|
Mining machine
|
|
US3756669A
|
|
Apparatus for holding a rotary tool
|
|
CA975015A
|
|
Mining machine having dust collecting means
|
|
US3819101A
|
|
Apparatus for setting pins in mine roofs
|
|
GB1315765A
|
|
Mining machine and mining head therefor
|
|
CA947542A
|
|
Mine roof pins and apparatus for setting the same
|
|
US3698769A
|
|
Mining machine having liquid supply sealing means
|
|
US3680920A
|
|
Material collecting means for mining machines
|
|
US3667276A
|
|
Spiral element and method for making same
|
