LandOfFree - US Patents - Listing for Mining or in situ disintegration of hard material

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Tunnel excavator

Mining or in situ disintegration of hard material – Hard material disintegrating machines – With mine roof-supporting means

Tunnel excavator

Mining or in situ disintegration of hard material – Hard material disintegrating machines – With mine roof-supporting means

Tunnel excavator with crawler drive and roof support bearing...

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Rotary cutter head with advance direction coincident or...

Tunnel excavator with S-shaped soil plate

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Rotary cutter head with advance direction coincident or...

Tunnel excavator with variable pressure water jets

Mining or in situ disintegration of hard material – Mine layouts

Tunnel layout for longwall mining using shields

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Cutter shiftable horizontally

Tunnel or road header

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine

Tunnel profile control

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Tunnel-boring machine and method of using the same

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Tunnel-excavating machine

Mining or in situ disintegration of hard material – Processes – Stabilizing underground structure

Tunnel-excavating machine with shield formed of segments

Mining or in situ disintegration of hard material – Hard material disintegrating machines – With mine roof-supporting means

Tunneling equipment

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Tunneling machine

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Tunneling machine

Mining or in situ disintegration of hard material – Hard material disintegrating machines – With mine roof-supporting means

Tunneling machine

Mining or in situ disintegration of hard material – Hard material disintegrating machines – With mine roof-supporting means

Tunneling machine having liquid balance low flow slurry system

Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Tooth mounted on helical head portion or head with helical...

Tunneling machine rotatable member

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Rotary cutter head with advance direction coincident or...

Tunneling machine with center cutter and debris removing means

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means

Tunneling machine with massive guide for impact tools