Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1981-05-18
1984-02-28
Schmidt, Frederick R.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51429, B24C 306, B24C 900
Patent
active
044335113
ABSTRACT:
A mobile apparatus for treating surfaces by abrasive blasting consists of a mobile housing having self-propelled endless tracks or treads for moving over the surface to be treated. The housing has a reservoir for abrasive particles and a rotary wheel with blades operable on rotation to throw the abrasive particles against the surface to be treated to abrade or etch the surface. The rotary wheel is operable to throw the abrasive particles at a high velocity at an angle to the surface. A return passage for the particles has an opening at the angle of rebound of the particles extending toward the reservoir. A plurality of trays receives the recirculating particles, fill with particulate material and then spill into the reservoir. Particulate material on the trays absorbs kinetic energy from the particles to prevent further rebounding. The particles spill from the trays in a stream or sheet intersected by a stream of air removed overhead adjacent the trays which separates coarser particulate debris from the abrasive particles en route back to the reservoir. Dust collectors are provided which separate the dust from the air used in separating coarse debris from the abrasive and from the air supplied to assist in sweeping debris from beneath the apparatus. The housing is resiliently supported at one end to move over irregular surfaces without hanging up. A plurality of air passages direct air flow under the apparatus to sweep the surface to assist in removal of particulate.
REFERENCES:
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patent: 3934372 (1976-01-01), Diehn et al.
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patent: 3981104 (1976-09-01), Dreher
patent: 4020596 (1977-05-01), Bergh
patent: 4052820 (1977-10-01), Bergh
patent: 4222205 (1980-09-01), Lake et al.
patent: 4319436 (1982-03-01), Van Fossen
Mosely Neal J.
Rose Robert A.
Schmidt Frederick R.
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