Non-rotary mining cutter with recessed nozzle insert

Claim 2

In or for a mineral winning machine, a non-rotary tool assembly comprising holding means and a tool detachably mounted to the holding means, the tool being provided with a cutting region and at least one nozzle for discharging a jet of high pressure fluid suitable for detaching mineral from a mineral face, said tool having a body with a detachable nozzle insert therein and wherein the body has a main bore containing the nozzle insert, and said nozzle insert has an outlet mouth communicating with a further bore coaxially with the main bore and leading to an exterior surface of the body.

Claim 3

A tool according to claim 1, wherein the further bore has a diameter in the range two to ten times greater than the narrowest internal diameter of the nozzle insert.

Claim 4

A tool according to claim 1, wherein the further bore leads to the exterior surface by way of a frustoconical recess.

Claim 5

A tool according to claim 1, wherein the nozzle insert is located in a tubular member engaged in the main bore.

Claim 6

A tool according to claim 4, wherein the tubular member is in screw-threaded engagement with the main bore.

Claim 7

A tool according to claim 4, wherein the tubular member is formed with a coupling piece for connection to fluid supply means.

Claim 8

A tool according to claim 1, wherein the nozzle insert is located in a stepped bore wholly within the body and a detachable locking member in screw-threaded engagement with part of the bore locates the insert in position.

Claim 9

A tool according to claim 1, wherein the body has a shank portion for engagement in the holding means.

Claim 10

A tool according to claim 1, wherein the main bore is provided in an attachment to a flat plate like member.

Claim 11

A tool assembly according to claim 1 wherein the nozzle is recessed within the body at an angle to discharge the jet substantially perpendicularly to a mineral face during the use of the tool.

Claim 12

A tool assembly according to claim 1 wherein the nozzle is recessed within the body at an angle to discharge the jet at an angle to a mineral face during use.

Claim 13

A tool assembly according to claim 1 wherein the nozzle is recessed within the body in a position to discharge the jet at a position spaced from the cutting region.

Claim 14

A tool assembly according to claim 1 wherein the nozzle is recessed within the body at a position to discharge the jet at a position adjacent the cutting region.

Claim 15

A mineral winning machine equipped with conventional cutters and additional non-rotary tool assemblies staggered in alternate manner to intersperse with the conventional cutters, wherein each additional non-rotary tool assembly comprises holding means and a tool mounted to the holding means, said tool comprising a body having a cutting region and at least one detachable nozzle insert contained in a main bore within the body, said nozzle being connected by way of a further bore concentric with the main bore to an exterior surface of the body, said nozzle insert and coaxial bore serving to discharge a jet of high pressure fluid suitable to detach mineral from a mineral face.

Claim 16

A mineral winning machine equipped with conventional cutters and additional non-rotary tool assemblies staggered in alternate manner to intersperse with the conventional cutters, wherein each additional non-rotary tool assembly comprises holding means and a tool mounted to the holding means, said tool comprising a body having a cutting region and at least one detachable nozzle insert contained in a main bore within the body, said nozzle being connected by way of a further bore concentric with the main bore to an exterior surface of the body, said nozzle insert and coaxial bore serving to discharge a jet of high pressure fluid suitable to detach mineral from a mineral face.