US 4,280,572 A · Chisel for a percussive tool

Abstract

A percussive tool, particularly a chisel for percussive working in rock, has a body portion, and a nozzle arrangement in the body portion, which is operative for forming a high-speed flow of a high-pressure fluid, particularly liquid, and directing the same to a working region of the body portion. The nozzle arrangement may include a plurality of nozzle holes which are open into the working region. It may also include at least one nozzle hole and at least one nozzle directing the flow of fluid into the nozzle hole. The nozzle may be supported by a supporting member which has an inner passage and extends from an inner chamber of a head section of the body portion into a receiving recess of a shaft section of the latter. The supporting member may be adjustable in the direction of a longitudinal axis of the chisel.

Claims18

Dependent claims

A chisel for a percussive tool, particularly for percussive mining of rock, comprising a body portion having a working region;

and at least one nozzle mounted in a chamber of said body portion and operative for forming a high-speed flow of a high-pressure fluid, particularly of a high-pressure liquid, and directing said fluid toward said working region, wherein said body portion has a head section and a shaft section connectable with one another, said chamber being arranged in said head section, and having at least one nozzle hole formed in said head section and communicating with said chamber and with said working region, and said at least one nozzle being arranged for directing the flow of fluid into said at least one nozzle hole.

Dependencies are inferred from the claim text.

Chisel for a percussive tool

Life of this patent

Chisel for a percussive tool

Life of this patent

Abstract

Claims18