US 12,460,545 B2
Cutting apparatus
Martin Gimpel, Leoben (AT); Hubert Kargl, Gaal (AT); Bernhard Ebner, Knittelfeld (AT); and Guenther Staber, Murau (AT)
Assigned to Sandvik Mining and Construction G.m.b.H., Zeltweg (AT)
Appl. No. 17/630,572
Filed by SANDVIK MINING AND CONSTRUCTION G.M.B.H., Zeltweg (AT)
PCT Filed Jul. 31, 2019, PCT No. PCT/EP2019/070578
§ 371(c)(1), (2) Date Jan. 27, 2022,
PCT Pub. No. WO2021/018390, PCT Pub. Date Feb. 4, 2021.
Prior Publication US 2022/0259973 A1, Aug. 18, 2022
Int. Cl. E21D 9/10 (2006.01)
CPC E21D 9/1013 (2013.01) [E21D 9/102 (2013.01); E21D 9/104 (2013.01); E21D 9/1093 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A cutter head arranged for excavating hard rock materials in rock face, the cutter head comprising:
a carrier attached to a cutter arm of a cutter machine, and a drive shaft rotatably supported by the carrier, the drive shaft being rotatable about a drive axis and including at one end a support portion for mounting disc cutters; and
a plurality of disc cutters mounted on the support portion and configured to perform undercutting against the rock face, each disc cutter being undriven and freely rotatable about a respective support axis, wherein the disc cutters are attached on the support portion in a manner such that the support axes of the disc cutters extend to intersect with one another at the drive axis at an intersection point and lie within a common conical surface, and wherein the support axis of each disc cutter is inclined relative to the drive axis by a disc inclination angle, the disc inclination angle being in a range between 45 to 89 degrees.
 
13. A cutter apparatus arranged for creating a tunnel, the cutter apparatus comprising:
a main frame;
a support mounted on the main frame and slidable relative to the main frame in a longitudinal direction of the cutter apparatus; and
a cutter head according to claim 1 mounted at a distal end of the cutter arm, the cutter arm being mounted on the support and rotatable about a vertical axis.