Boring or penetrating the earth – With below-ground tool drive prime mover – With below-ground feed means
Patent
1975-01-29
1976-06-15
Purser, Ernest R.
Boring or penetrating the earth
With below-ground tool drive prime mover
With below-ground feed means
175 61, 299 31, E21D 910
Patent
active
039630803
ABSTRACT:
A tunneling machine is disclosed for boring a side drift extending from a main tunnel. The earth boring machine includes a main beam assembly for longitudinal disposition within said tunnel. A cutterhead support assembly is connected to said main beam. A cutterhead assembly including a cutterhead is mounted on said cutterhead support assembly for rotation generally about the longitudinal axis of said tunneling machine. Power means are coupled to said cutterhead assembly for rotation of the cutterhead. A first vertical gripper assembly is slidably connected to said main beam assembly and engageable with the back and the invert of said tunnel for facilitating the advance and guidance of said main beam, cutterhead support, cutterhead assembly, and cutterhead. Guiding thrust means are provided between said first vertical gripper assembly and said main beam assembly for providing a horizontal guiding force to said main beam assembly. A second vertical gripper assembly is slidably connected to said main beam assembly and engageable with the back and invert of said tunnel for facilitating the advance of said main beam, cutterhead support, cutterhead assembly, and cutterhead longitudinally through said tunnel. Thrust ram means are provided between said second vertical gripper assembly and said cutterhead support assembly for forcing said cutterhead against the working face.
REFERENCES:
patent: 2919121 (1959-12-01), Ruth
patent: 2946578 (1960-07-01), De Smaele
patent: 3345108 (1967-10-01), Newman et al.
patent: 3415574 (1968-12-01), Lauber
patent: 3511539 (1970-05-01), Schonfeld
patent: 3640573 (1972-02-01), Safar
patent: 3695717 (1972-10-01), Birrer
patent: 3840271 (1974-10-01), Sugden
Dresser Industries Inc.
Pate III William F.
Purser Ernest R.
Scott Eddie E.
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