Device for breaking solid material and method of manufacturing a hose element for such a device
AssigneeEmstone AB
InventorsKarl Gustaf Derman, Lennart Derman
Life of this patent
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Abstract
A device for breaking solid material comprises an expansible hose element which is insertable into a hole in the solid material and has an externally substantially geometrically regular cross-section. At least at one of its ends, the hose element comprises a coupling. The device further comprises at least one expansion portion with an expansion chamber. The hose element further comprises an expansion limiter which has a varying radial distance from the outside of the hose element along the circumferential direction of the hose element.
Claims16
A device for breaking solid material, comprising an expansible hose element which is insertable into a hole in the solid material and has an externally substantially geometrically regular cross-section, said hose element comprising a coupling at least at one of its ends, the device further comprising at least one expansion portion with an expansion chamber wherein the hose element further comprises an expansion limiter which has a varying radial distance from the outside of the hose element along the circumferential direction of the hose element.
A method of manufacturing a hose element, comprising the steps of positioning a hydraulic hose with a substantially circular cross-section between two parallel flat surfaces, moving the two flat surfaces towards each other so that the hydraulic hose is pressed so as to obtain two substantially flat surfaces, applying material to the hydraulic hose so as to give it an externally substantially geometrically regular cross-section.
Dependencies are inferred from the claim text.