.~ Stationary piston or movable piston with moving cylinder
Unofficial Alpha Subclasses: R A
DEFINITION
Classification: 92/117
(under the class definition) Apparatus comprising a cylinder adapted to slidably receive a piston therein, said cylinder being mounted for relative movement with respect to a supporting structure, movement of said cylinder relative to said supporting structure being responsive to or causing the expansion or contraction of the expansible chamber.
(1) Note. An expansible chamber device in which it involves an obvious matter of choice or reversal of parts whether the piston is stationary and the cylinder movable or vice versa is excluded even if the claim identifies the cylinder as the movable element. In the case, however, where the cylinder, for example, is provided with a specific power transmission element, or means to guide the cylinder in a specific path, including an outer casing in which the cylinder partakes of a relative axial movement incident to expansion or contraction of the chamber, or where a specific form of mounting means is provided to allow the cylinder to move about an axis incident to the expansion or contraction of the expansible chamber, classification under this definition results.
SEE OR SEARCH THIS CLASS, SUBCLASS:
31+, for a cylinder which is rotatable relative to a working member slidable therein along an axis which coincides with the axis of the cylinder, incident to the rectilinear motion of the working member.
51+, for a cylinder movable relative to a concentric outer casing, and having a working member within such cylinder and axially movable relative to both said cylinder and casing.
54+, for a cylinder which moves in a circular path of more than 360 degrees incident to the expansion or contraction of the expansible chamber. 66, for a plurality of relatively movable cylinders forming either (1) working members or (2) working chambers for a plurality of relatively movable working members.
SEE OR SEARCH CLASS
91, Motors: Expansible Chamber Type,
196+, for an expansible chamber type motor having a moving cylinder.
123, Internal-Combustion Engines,
50, for an internal combustion engine having a reciprocating cylinder.
173, Tool Driving or Impacting,
125, for an impacting hammer head constituted by or fixed to a drive motor cylinder.
417, Pumps,
460, for an expansible chamber type pump having a moving cylinder.
