US PATENT SUBCLASS 91 / 196
MOVING CYLINDER

Current as of: June, 1999
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91 /   HD   MOTORS: EXPANSIBLE CHAMBER TYPE

196MOVING CYLINDER {4}
197  DF  .~> Plural rigidly connected rotary cylinders
206  DF  .~> With integral exterior working face {1}
210  DF  .~> Oscillating cylinder {2}
216 R  DF  .~> Cylinder and piston have relative reciprocation on fixed axis {3}

DEFINITION

Classification: 91/196

(under the class definition) Apparatus in which, incident to the operation of the motor, the cylinder has an absolute movement.

(1) Note. Those motors in which it involves an obvious matter of choice and/or reversal of parts whether the piston is stationary and the cylinder movable or vice versa will not be classified under this definition even if the claims identify the cylinder as the movable element provided that the claims do not set forth a specific power transmission between the cylinder and driven member or load.

(2) Note. An open ended cylindrical member which has sliding and/or rotary movement with respect to the piston merely for valving purposes is not included under this definition. However, if the cylindrical member carries or has formed as a part thereof the end wall of the expansible chamber (i.e., the abutment) it is considered to be a cylinder and is included under this definition even if the sole disclosed purpose of the sliding and/or rotary movement is for valving.

(3) Note. A cylinder which moves merely because it is a part of a motor which moves as an entity, as by being mounted on a movable device (e.g., check) is not included under this definition because of said mounting.

SEE OR SEARCH THIS CLASS, SUBCLASS:

67+, for expansible chamber motors of the rotary type in which the rotating working member is a rotating cylinder. 169, for expansible chamber motors wherein the chamber is formed by a movable cylinder, sleeve and piston.

173, for expansible chamber motors having a moving cylinder formed by a working member, the moving cylinder having another working member movable therein.

176, for relatively movable working members in which the cylinder is a moving cylinder.

SEE OR SEARCH CLASS

92, Expansible Chamber Devices,

54+, for cylinders mounted for rotation where no valving is claimed, subclasses 117+ for cylinders mounted for movement incident to expansion and contraction of the working chamber and subclasses 51+ for a working chamber having mutually relatively movable tubular member, member slidable therein and an outer cylinder therefor.