US PATENT SUBCLASS 239 / 291
.~ Air shield surrounds projected airstream (i.e., air gun)

Current as of: June, 1999
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239 /   HD   FLUID SPRINKLING, SPRAYING, AND DIFFUSING

290  DF  INCLUDING SUPPLEMENTAL GAS SHAPING OR SHIELDING JET {8}
291.~ Air shield surrounds projected airstream (i.e., air gun)

DEFINITION

Classification: 239/291

(under subclass 290) Apparatus in which the shielding jet provides a curtain about an air jet discharge means.

(1) Note. These patents relate to air guns for blowing away chips and the like by a main stream and which have an additional usually conical air stream surrounding the main stream to confine the moving material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

288, for solid shields or protectors for the operator.