(under the class definition) Apparatus comprising a passage or port adapted to conduct and permit the entry or exhaust of fluid to or from the working chamber of the expansible chamber device, said passage or port not being in the movable wall portion of said chamber.
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55, for a rotating cylinder provided with a fluid conduit coaxial with the axis of rotation of the cylinder.
106, for a fluid conduit in constant communication with a relatively rotating working chamber.
110+, for a piston having a hollow rigid stem or rod forming a fluid conduit for introducing or exhausting working fluid to a working chamber.
119, for a cylinder having one end thereof pivotally mounted on a supporting structure, and in which the fluid conduit or port for permitting entry or exhaust of working fluid to or from the cylinder extends through the pivoted connection.
153+, for a fluid conduit to a working chamber designed to convey lubricant to the chamber. 181+, for a fluid conduit or port in the end face of a piston.
SEE OR SEARCH CLASS
91, Motors: Expansible Chamber Type, appropriate subclasses for a fluid port or conduit opening into the working chamber of an expansible chamber which conduit is provided with selectively variable means to control the flow of fluid through the conduit. A mere closure cap or plug for a port or conduit opening into the working chamber of an expansible chamber device is not considered as a means to control the flow of fluid through the port or passage and is classified
