(under the class definition) Devices comprising one or more valve heads and their cooperating seats, with or without actuating means, formed in a sleeve, bonnet or similar structural unit which is removable as such from a valve body or housing.
SEE OR SEARCH THIS CLASS, SUBCLASS:
223+, particularly subclass 234.5 for inflatable article valves having a removable core unit provided with a head and seat.
283+, for removable units in hydrant valves.
493.1+, 512.2 and 614.19, for one valve head and seat carried by, and therefore removable with, another valve head.
515+, for removable head and seat units in valve couplings or
unions. 525.1, for combined lip-like heads and seats.
