US 6,273,154 B1 · Suction-removal apparatus for sand-blasting and liquid pressure nozzles

Abstract

During blasting work, large quantities of blasting material (granules, glass, beads, slag and sand) together with residues of blasted color coating are projected over a large area after impact with the surface being blasted. This results in the pollution of large areas of the surrounding environment. The large quantities of dust produced cause problems for the population over a much wider area. The novel suction device prevents blasting material, dust and liquids from escaping from the blasting site and the area immediately surrounding the blast nozzle into the environment during blasting work. A second suction system which functions separately allows the device, with its integrated blast pressure nozzle, to hold itself steady automatically, even in extreme working positions, such as overhead, hereby relieving the operator of this task, and can still be moved laterally in any direction. The high suction capacity of the device ensures that the blasting material or liquids which rebound or are projected off of the surface during blasting work are extracted without leaving a residue and collected in containers. The inventive suction device can also be used for drying the expansion joints of concrete slabs etc. and prevents the pollution of the environment with residues of dust, joint material and chemical material.

Claims25

Dependent claims

A suction-removal apparatus for sand-blasting and liquid pressure nozzles, comprising:

a double-wall protective shroud enclosing a blasting chamber to be placed on a surface of a work area, said protective shroud having two walls defining a cavity there-between and a surrounding suction channel communicating with a first suction-removal system for removing by suction from a contact surface between said protective shroud and the surface of the work area blasting products generated at the work area;
a second, independent suction-removal system including a plurality of suction pipe connection stubs protruding through said double-wall protective shroud into said blasting chamber and distributed about an entire periphery of said protective shroud;
an inner blasting-pressure nozzle enclosed in a surrounding suction pipe and being adjustably and movably mounted in said protective shroud;
deflection devices selected from the group consisting of baffles, deflection plates, and profiles mounted inside said protective shroud for deflecting blasting material or liquids directly to said suction pipe connection stubs;
and
rolling devices mounted on said protective shroud for placement in contact with the surface of the work area for allowing a displacement of said protective shroud relative to the surface in spite of a suction attachment of said protective shroud during an operation of the suction-removal apparatus.

3 more elements

Dependencies are inferred from the claim text.

Suction-removal apparatus for sand-blasting and liquid pressure nozzles

Life of this patent

Suction-removal apparatus for sand-blasting and liquid pressure nozzles

Life of this patent

Abstract

Claims25