LandOfFree - US Patents - Listing for Mining or in situ disintegration of hard material,Hard material disintegrating machines

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

Tunnel driving apparatus with cutter arms internal and external

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

Tunnel excavating machine

Mining or in situ disintegration of hard material – Hard material disintegrating machines – With material-handling means

Tunnel excavator

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 – Hard material disintegrating machines – Cutter shiftable horizontally

Tunnel or road header

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 – 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 – 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

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

Tunneling machine with plural adjustable arms carrying single cu