(under the class definition) Subject matter wherein means are provided for lubricating the actuator or valve parts other
than those exposed to the fluid flow.
SEE OR SEARCH CLASS
123, Internal-Combustion Engines,
90.33+, for poppet valve operating mechanism which provides for lubrication.
137, Fluid Handling,
237+, for systems in which the lubrication is put into the fluid stream, especially subclasses 246+ for liquid sealing and/or lubrication at the valve interface, subclass 298 for actuator lubricating means in hydrants and subclasses 330+ for nonvalving motions of valves, sometimes intended to prevent sticking, and see the search notes thereto. 184, Lubrication, appropriate subclasses, for installed lubricating means generally.
