Pressure-balanced vacuum blast head

Details Pressure-balanced vacuum blast head Pressure-balanced vacuum blast head

1995-10-13

1998-01-20

Rose, Robert A.

Abrading

Machine

Sandblast

451102, 451101, B24C 504

Patent

active

057095906

ABSTRACT:
In a blast head for a vacuum blasting operation, abrasive particles in a stream of compressed air are directed against a work surface and removed by vacuum. Ambient air is directed into the blast head upstream of the work surface to reduce frictional forces between the blast head and the work surface due to the vacuum. The ambient air is admitted through a one-way spring biased valve. The flow of ambient air into the blast head is controllable by adjusting the spring force in the valve.

REFERENCES:
patent: 2455514 (1948-12-01), Mead
patent: 3675452 (1972-07-01), Osmolovsky et al.
patent: 4993200 (1991-02-01), Morioka et al.

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