US PATENT SUBCLASS 454 / 56-- .~ Covered workbench chamber (e.g., fume hood, etc.)

US PATENT SUBCLASS 454 / 56
.~ Covered workbench chamber (e.g., fume hood, etc.)

Current as of: June, 1999
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454 /	HD	VENTILATION

49	DF	WORKSTATION VENTILATOR (E.G., HOOD, OFFTAKE, ETC.) {5}
56		.~ Covered workbench chamber (e.g., fume hood, etc.) {2}
57	DF	.~.~> Having air inlet separate from access opening {2}
61	DF	.~.~> Having outlet airway flow adjustment means {1}

DEFINITION

Classification: 454/56

Covered workbench chamber (e.g., fume hood, etc.):

(under subclass 49) Subject matter wherein the task area is within a cabinet-like enclosure which allows admittance by an operator to work on a task.

(1) Note. The enclosure need not enclose the task area on all sides, but if it does, it must provide an entryway for the work arms of an operator to work on a task.

SEE OR SEARCH CLASS

126, Stoves and Furnaces, particularly

299+, for a stove hood.

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, particularly

104, for a laboratory housing or hood, per se.