US PATENT SUBCLASS 91 / 357
SELECTIVELY USABLE OR POSITIONABLE WORKING MEMBER CONTROLLED VENT IN CHAMBER WALL (402)


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

357SELECTIVELY USABLE OR POSITIONABLE WORKING MEMBER CONTROLLED VENT IN CHAMBER WALL (402)


DEFINITION

Classification: 91/357

(under the class definition) Apparatus in which a nonmovable portion of the working chamber wall is provided with (1) an outlet opening intermediate the limits of movement of the working member and means for selectively opening and closing said outlet opening or (2) an outlet opening the position of which is adjustable in the direction of working member travel; said outlet opening acting as a vent for the expanding chamber or an exhaust for the contracting chamber which is cut off when overrun by the working member.

(1) Note. In connection with part (1) of this definition the outlet opening only acts as a vent when it is selectively opened. In many cases there is provided a plurality of longitudinally spaced controllable vents to cause the working member to stop at any one of a plurality of selected positions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

402, for motors in which the working member overruns an exhaust port to vent the expanding chamber.