.~> Cylinder or liner retained in casing by casing closure or closure associated means
DEFINITION
Classification: 92/169.1
CYLINDER DETAIL:
(under the class definition) Apparatus comprising particulars of a cylinder.
(1) Note. Patents disclosing a cylinder or working chamber but claiming no more of the disclosed device than what is descriptive of a structure of general utility, such as a tube, container or closure are classified in appropriate structural classes. Examples of claimed features which are considered to be too special to the cylinder art for classification in general structural classes and which cause classification under the definitions are (a) a part or other restricted passage for fluid flow, (b) a nominally claimed piston, (c) the naming of a part as a pump body, engine block, cylinder block, crankcasing or the like or (d) a cylinder or liner positioned in a casing or housing and in which the casing or housing closure secures the cylinder or liner within the casing.
(2) Note. A cylinder head or closure, per se, claiming some structure which goes beyond a closure of general utility, and
which limits such closure or head for use as a part of an expansible chamber device is included under this definition.
(3) Note. A piston and cylinder combination in which the cylinder is nominally claimed is excluded from this subclass. Such structure is classified below on the structure of the piston.
SEE OR SEARCH THIS CLASS, SUBCLASS:
51+, for a telescoping cylinder.
107+, for a cylinder adapted to receive an annular working member. 120+, for a cylinder adapted to receive an oscillating working member.
146+, for plural unitarily mounted cylinders.
163+, for a cylinder provided with a fluid conduit or port.
164, for a cyclinder and closure provided with a fluid conducting port.
165+, for a cylinder head or closure provided with means to guide a piston or a member moved by the piston.
SEE OR SEARCH CLASS
123, Internal-Combustion Engines,
193.1+, for a cylinder for an internal combustion engine.
138, Pipes and Tubular Conduits, appropriate subclasses for the structure of a tubular member even though disclosed as a cylinder for an expansible chamber device. Class 138 takes a cylinder when the claims include no more than the structure of a tubular member.
220, Receptacles, appropriate subclasses for a container and/or closure therefor of general utility. Class 220 takes a nominally claimed cylinder for an expansible chamber device when the claims are directed to no more than the structure of a container. Also Class 220 takes a cylinder or cylinder head therefor to no more than a container or closure therefor.
285, Pipe Joints or Couplings, appropriate subclasses for a joint between a plurality of tubular members or between a tubular member and a plate-like element. Class 285 takes a device comprising a plurality of tubular members and means to join said tubular member together, even though the completed structure may be disclosed as or nominally claimed as a cylinder for an expansible-chamber device. Further Class 285 takes a joint between a tubular member and a plate-like element even though the tubular member may be disclosed as as cylinder. 292, Closure Fasteners, appropriate subclasses for closure fasteners of general utility. Class 292 takes a nominally claimed cylinder and head or closure combined with means to secure the head or closure to the cylinder.
