(under subclass 232) Meters wherein the expansible measuring chamber is defined in whole or in part by a diaphragm, bellows or similar type of collapsible wall which moves to provide the expansion.
SEE OR SEARCH THIS CLASS, SUBCLASS:
272+, for elements such as casings, diaphragm mountings and diaphragms.
SEE OR SEARCH CLASS
92, Expansible Chamber Devices,
34+, for a bellows type expansible chamber device; subclasses 89+ for a collapsible chamber wall type expansible chamber device.
417, Pumps,
472+, 474+, 478, 479, 480 for expansible chamber type pumps having a collapsible wall.
418, Rotary Expansible Chamber Devices,
45, for rotary expansible chamber devices having a collapsible wall.
