Abstract: Method of solvent spray impact cleaning utilizing a hand directed pump nozzle for impact spraying of parts, by eye through a viewing window, and an enclosing chamber containing the parts in a manner whereby the zone for solvent spray by the pump nozzle is closely confined within the enclosure so as not to expose the operator or the outside environment to the liquid runoff of the solvent, or to the sprayed particles thereof, or to solvent steam or vapors rising at the spraying temperature. The internal air of the chamber and all solvent are continually recycled electrically by blower and pump for re-use after the latter, once in an operative status, are then activated according to the washing procedure. The recycled air re-enters through a blower nozzle directed so that it clears the window.

Abstract: Hot tank washer for cyclically repeated temporary intervals of spray cleaning operation, and controls therefor automatically coordinating operation of the system initiating switch, a heat interruption switch, and a door switch with one another and with other system operations. The heat interruption switch inherently puts the hot tank heating on standby momentarily with no power, incident to the user operating the spray system initiating switch; the spray system comes on under full power, incident to, and only contingent upon, the hot tank heating being first put on standby with no power; the spray system and a washer defogger system are automatically secured from operation, incident to the door switch being operated by opening of an access door allowing new work to be put into the washer.

Abstract: High pressure washing method utilizing a hand directed spray nozzle for cleaning parts, by eye through a viewing window, and an enclosing chamber containing the parts in a manner whereby the zone for solvent spray by the nozzle is closely confined within the enclosure so as not to expose the operator or the outside environment to the liquid runoff of the solvent, or to the sprayed particles thereof, or to solvent steam or rising vapors. With a view to ecology considerations, and in addition to the concern to confine the contaminant from escaping into the environment, the internal air of the chamber and all solvent are continually recycled for re-use according to the washing procedure. Such procedure entails, in the practice of the instant invention, keeping down the vapor concentration by defogging the chamber air, and simultaneously defogging the viewing window through blanketing same by the defogged air as recycled.

Abstract: High pressure parts washer having a hand directed spray nozzle, and an enclosing chamber containing the parts in a manner whereby the spraying zone for solvent, with which the parts are sprayed by the nozzle, is closely confined within the enclosure so as not to expose the operator or the outside environment to the liquid runoff of the solvent, or to the sprayed particles thereof, or to solvent steam or rising vapors. With a view to ecology considerations, and in addition to the concern to confine the contaminant from escaping into the environment, the internal atmosphere of the chamber and all solvent are continually recycled for re-use by the washer.