Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1986-11-06
1988-09-20
Olszewski, Robert P.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51273, 209240, 209288, B24C 900
Patent
active
047715790
ABSTRACT:
A process and apparatus are disclosed for recovering and cleaning contaminated particulate abrasives blast media for reuse. A first vacuum system vacuums up spent contaminated blast media from a work site and entrains it in an airstream. The entrained contaminated media is then projected onto a target surface that absorbs momentum of the contaminated media such that media and contaminates at least equal in weight to the media drop out of air suspension while contaminates lighter in weight than the media substantially remain in suspension. The contaminated media that drops out of entrainment falls into a rotating drum having apertured cylindrical wall surfaces that permit blast media to pass therethrough while retaining oversized contaminates. The rotating apertured drum is contained within a housing that is evacuated to substantially remove the lighter weight contaminates from the housing and, hence, from the media. The cleaned media passing through the rotating drum apertured surfaces is collected and returned to the blast cleaning process.
REFERENCES:
patent: 2455514 (1948-12-01), Mead
patent: 3005547 (1961-10-01), Freeman
patent: 3097452 (1963-07-01), Freeman
patent: 3756406 (1973-09-01), Khan
patent: 4020596 (1977-05-01), Bergh
patent: 4140281 (1979-02-01), Fulghum Jr. et al.
patent: 4543029 (1985-09-01), Grun et al.
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