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US 5,295,735 AGranted
Rock saw
OwnerDavid C. Cobbs, James H. Cobbsinventors
Life of this patent
Estimating the term…
Abstract
A device for cutting trenches in hard rock. A plurality of disc-like primary cutters are positioned on arms around a frame. The frame rotates about a central shaft and the center shaft is moved along horizontally in the direction the trench is to be cut. Between the primary cutters are reaming cutters. Each primary and each reaming cutter is provided with a plurality of spaced apart indentors secured to the external surface and each indentor has an end point and being adaptable to penetrate the rock face upon the application of working force a distance "P" and wherein the indentor end points are spaced a distance not greater then 7P apart.
Claims15
A machine for cutting a trench in rock which comprises:
- a frame having a horizontal axis about which the periphery of the frame may rotate;
- means to rotate said frame about said axis;
- a plurality of primary cutters spaced about the periphery of said frame;
- a support arm for each said primary cutter, each said primary cutter is rotatably supported from its respective support arm such that the axis of said primary cutter is parallel to the axis of said horizontal axis, each said arm being fixed to the periphery of said frame;
- each said primary cutter having a disc-like body member having a plurality of spaced apart indentors secured to the external surface thereof, each indentor having an end point, the indentors being adaptable to penetrate into the rock face upon application of working force a distance "P" and wherein said indentor end points are spaced a distance not greater than 7P apart;
- and
- a reaming cutter positioned between each pair of said primary cutters, a support arm supporting said reaming cutters from the periphery of said frame, said reaming cutters being rotatably mounted on said arm such that the shaft of rotation is parallel to the shaft of rotation of the primary cutters.
4 more elements
A machine for cutting a trench in rock which comprises:
- a frame;
- an endless track supported by said frame;
- a moving member supported for movement around said track;
- means to drive said moving member along said track;
- a plurality of primary cutter arms supported from said moveable member;
- and
- a primary cutter rotatably mounted from each said arm, each said cutter having a plurality of spaced apart indentors secured to the external surface thereof, each indentor having an end point, the indentors being adaptable to penetrate into the rock face upon the application of working force a distance "P" and wherein said indentor end points are spaced a distance not great then 7 P apart.
4 more elements
An apparatus for cutting a trench in hard rock which comprises:
- a frame having a central axis;
- a shaft about which said frame is rotatably supported;
- means to rotate said frame about said shaft;
- a plurality of primary cutter elements;
- a support arm for each said primary cutting elements supporting said element from said frame, each of said support arms having a shaft upon which each said primary cutter is mounted;
- each of said cutters having a plurality of spaced apart indentors secured to the external surface thereof;
- a plurality of reaming cutters, there being one for each said primary cutter;
- a support arm for supporting each of said cutter from said frame, each of said reaming cutter support arms having a shaft upon which said reaming cutter is mounted;
- and
- each of said reaming cutters having at least two portions, each portion having a plurality of spaced apart indentors secured to the external surface of each of said portion.
7 more elements
A machine for cutting a trench in rock comprising:
- a support member including a first shaft;
- primary cutting member having a disc-like integral body member having a major rim and at least one minor rim, said major and minor rims being essentially circular and having a common axis, said body member being rotatably mounted on said shaft at said common axis;
- a plurality of spaced apart indentors secured to the external surface of each said rim, each indentor having an end point, the indentor being adaptable to penetrate into the rock face upon the application of working force a distance "P" and wherein said indentor end points are spaced a distance not greater than seven times the depth of penetration (7P) apart;
- means to move said support member;
- a reaming cutter supported from said support means on a shaft having an axis parallel to said first shaft, said reaming cutter having at least a major and a minor rim, said second body member of said reaming cutter being of a greater width than that of said body of said cutter;
- and
- a plurality of spaced apart indentors secured to the external surface of said major and said minor rims of said reaming cutters, each indentor having an end point, the indentor being adaptable to penetrate into a rock face upon the application of work in force at distance P, wherein said indentor end points are spaced a distance of not greater than 7P apart.
4 more elements
Dependencies are inferred from the claim text.