(under subclass 146) Apparatus in which the cylinders are positioned end to end and have a common longitudinal axis.
(1) Note. A mere axially extending hollow tubular element of uniform diameter, in which the sole means for dividing the same into two chambers is a reciprocatory working member, is not considered as constituting plural cylinders, and is excluded from this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
150, for coaxial cylinders combined with a casing or support for a rotary shaft.
SEE OR SEARCH CLASS
123, Internal-Combustion Engines, 58.2+, for an internal combustion engine having a plurality of tandem cylinders.
