(under subclass 1.03) Subject matter wherein the reference standard comprises either (a) a solid cylinder or disk that fits snugly into a large cylinder and moves back and forth under fluid pressure (i.e., a piston), (b) a means for discharging a fine jet of liquid from a pressurized container (i.e., a sprayer), (c) a tube having a taper or constriction (i.e., a nozzle), or (d) an opening (i.e., an orifice).
SEE OR SEARCH THIS CLASS, SUBCLASS:
1.16+, for either (a) proving or calibrating a flowmeter having a nozzle or (b) using a flowmeter having a nozzle to prove or calibrate a device.
216, for a Weir type flowmeter having a constriction in the form of a submerged orifice or discharge nozzle.
294, for a liquid level or depth gauge having a funnel or hose nozzle.
861.61+, for a flowmeter having a pressure differential type (a) orifice or (b) flow nozzle.
SEE OR SEARCH CLASS 239, Fluid Sprinkling, Spraying, and Diffusing, appropriate subclasses for a sprayer or a nozzle, per se.
