Control system for liquid propelled abrasive cleaning

Details Control system for liquid propelled abrasive cleaning Control system for liquid propelled abrasive cleaning

1986-06-06

1989-04-18

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51410, B24C 700

Patent

active

048214671

ABSTRACT:
A liquid-propelled abrasive cleaning apparatus comprising a nozzle for applying a high pressure stream of water and propelled sand particles to a surface to be cleaned; a pump for furnishing water under high pressure to the nozzle, the pump being of a kind which may be driven by a pressurized fluid medium and having a discharge outlet; a first conduit for connecting the outlet to the nozzle; a second conduit for delivering the medium to the pump; a normally closed valve in the first conduit; a pneumatic actuator for opening the valve; and a control device disposed in proximity with the nozzle for enabling pressure to be applied to the actuator to open the valve only when the nozzle is in use.

REFERENCES:
patent: 2317837 (1943-04-01), Webster
patent: 3201901 (1965-08-01), Pauli
patent: 3834082 (1974-09-01), Grudzinski
patent: 3858358 (1975-01-01), Stachowiak et al.
patent: 4517774 (1985-05-01), Dudding
patent: 4610113 (1986-09-01), Fageroos
patent: 4689923 (1987-09-01), Goudeaux et al.

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