PARTICULAR PISTON AND ENCLOSING CYLINDER CONSTRUCTION:
(under the class definition) Apparatus including a specific detail of either a piston (e.g., shape, material, construction) or a guiding chamber cooperating with and surrounding the piston, the piston or guiding chamber being adapted soley for use with an internal combustion engine or having a feature, construction, or peculiarity in mode of operation rendering its use in other relations or with other devices either impossible, or improbable.
SEE OR SEARCH THIS CLASS, SUBCLASS:
41.01+, for cylinder or piston cooling arrangement, especially subclass 41.16, for those having coolant sealed inside; subclass 41.34 for cooling of a piston and moving cylinder; and subclasses 41.67+ and 1.72+, for a jacketed or finned cylinder.
SEE OR SEARCH CLASS
92, Expansible Chamber Devices,
169.1+, for cylinder details for an expansible chamber device, subclasses 172+ for a piston for an expansible chamber device.
