US 9,038,744 B2 · Jet hammer

Abstract

An exemplary embodiment of the jet hammer includes an outer sleeve, impact assembly, and a valve assembly. The impact assembly is positioned in sliding relation to the outer sleeve to provide the impact of the jet hammer. The valve assembly generally comprises a cap screw, adjustment sleeve, valve port, inner compression spring, outer compression spring, and lock nut. The inner compression spring is relatively less compressible than the outer compression spring. In operation, fluid enters the valve assembly and acts on the compression springs forming an operational seal between the valve assembly and the impact assembly thereby slidingly displacing the outer sleeve from the impact assembly. Once the pressure acting on the valve assembly is released, the main compression spring decompresses forcefully causing an impact which is translated onto the obstruction or item to be struck.

Claims20

Dependent claims

An impact tool valve assembly, comprising:

a cap screw having an upper end and a lower end;
a valve port having at least one peripheral bore allowing fluid passage therethrough, wherein said valve port is slidingly disposed in relation to said cap screw;
an outer compression spring, and an inner compression spring slidably disposed within said outer compression spring;
and
said inner compression spring and said outer compression spring concentrically positioned around said cap screw in a slidable relation intermediate said valve port and said upper end of said cap screw.

2 more elements

An impact tool, comprising:

an outer sleeve having a hammer surface and an interior sleeve surface;
an impact assembly having an impact surface proximate said hammer surface, a shaft wall, and an internal bore at least partially extending therethrough;
said impact assembly being axially and rotatably movable in relation to said outer sleeve;
said impact assembly at least partially retained within said outer sleeve;
at least one opening provided in said shaft wall wherein said at least one opening is in fluid communication with said internal bore;
said at least one opening having an opening axis wherein said opening axis is angularly oriented toward said interior sleeve surface;
a main compression spring;
a valve assembly;
said main compression spring slidably disposed along said impact assembly intermediate said impact surface and said valve assembly;
wherein said valve assembly comprises;
a cap screw having an upper end and a lower end;
a valve port having at least one peripheral bore allowing fluid passage therethrough, wherein said valve port is slidingly disposed in relation to said cap screw;
an outer compression spring, and an inner compression spring slidably disposed within said outer compression spring;
and
said inner compression spring and said outer compression spring concentrically positioned around said cap screw in a slidable relation intermediate said valve port and said upper end of said cap screw.

12 more elements

Dependencies are inferred from the claim text.

Jet hammer

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Jet hammer

Life of this patent

Abstract

Claims20