Fluid sprinkling – spraying – and diffusing – Including supplemental gas shaping or shielding jet – Air shield surrounds projected airstream
Patent
1979-08-13
1981-04-14
Schacher, Richard A.
Fluid sprinkling, spraying, and diffusing
Including supplemental gas shaping or shielding jet
Air shield surrounds projected airstream
239456, 239498, 239514, 239522, B05B 128
Patent
active
042615160
ABSTRACT:
A conically shaped probe or forward portion on an air nozzle having a rearwardly extending hollow externally threaded portion providing an air flow duct. A supply of pressured air in communication with said air flow duct and having circumferentially spaced apart air outlets permitting air to flow from said air flow duct to an air flow gap and along the conical exterior surface of the probe, the COANDA effect functioning on this flow of air along the probe. A rotatable internally threaded collar is threadedly mounted on said hollow externally threaded portion of the probe and extends forwardly over and spaced from the plurality of air outlets and directing the flow of air through said gap to the external surface of the conical portion of the probe. The dimensions of the air flow gap may be varied by turning the collar to move it toward the conical portion of the probe or away therefrom. The rearward base portion of the conical shaped forward portion of the probe is provided with a trap to entrap any debris from mill scale that may be supplied from the main air supply. The trap is positioned at the forward end of the air flow duct and in communication therewith. In cleaning out holes which may be of a size so that the conical probe could be inserted therein to a distance, so that the top area adjacent the hole would abut against the collar preventing air flow through the gap so that the air pressure in the hole would approximate the line pressure, this occurrence is clearly undesirable. In order to prevent complete closure of the air flow gap in situations of this character, the collar is provided with circumferentially spaced apart projections which will abut against the top area adjacent the hole being cleaned thereby preventing closing of the air flow gap. Instead of a conically shaped probe a chisel point probe may be used which provides a ribbon or flat stream of air that adheres to any flat surface such as a machine tool table or bench.
REFERENCES:
patent: 3244376 (1966-04-01), Thompson
patent: 3252657 (1966-05-01), Winegar
patent: 3984054 (1976-10-01), Frochaux
patent: 3985302 (1976-10-01), Frochaux
patent: 4128209 (1978-12-01), Johnson
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