Sand blasting device

Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof

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Details

51426, 51427, 433 88, 433116, 433125, B24C 504, A61C 3025

Patent

active

051992299

ABSTRACT:
A hand-held sand blasting device, which is particularly useful for treating mall surface areas, such as tooth faces in situ, includes a sand cartridge 20 adapted to be placed in a handle portion 10 of the device and rewardly sealed by a piston 34 which is adapted to be advanced by pressurized air. Part of the pressurized air flows along a longitudinal groove 25 formed in a wall of the handle portion 10 externally of the cartridge 20 and enters the cartridge through an opening 27 provided at a front portion thereof, where the relatively large cross-section of the main portion of the cartridge converges to the substantially smaller cross-section of a feed channel 28. The fine sand 21 is thus fluidized in this area and maintained flowable. Through the feed channel 28, the sand is supplied to a mixing chamber 30 where it is mixed with pressurized air and discharged through a nozzle pipe 33.

REFERENCES:
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patent: 2400912 (1946-05-01), Britt et al.
patent: 4286950 (1981-09-01), Hawk
patent: 4424036 (1984-01-01), Lokken
patent: 4475370 (1984-10-01), Stark et al.
patent: 4540365 (1985-09-01), Nelson et al.
patent: 4608018 (1986-08-01), Ghedini et al.
patent: 4674239 (1987-06-01), Jodoin
patent: 4696645 (1987-09-01), Saupe et al.
patent: 4776794 (1988-10-01), Meller

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