US PATENT SUBCLASS 91 / 47
CONSTANTLY APPLIED MOTIVE FLUID WITH CONTROLLED VENTING

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

47CONSTANTLY APPLIED MOTIVE FLUID WITH CONTROLLED VENTING {4}
48  DF  .~> Plural separately controlled vents
49  DF  .~> Fluid vented through working member
50  DF  .~> Cyclically operable
51  DF  .~> Motive fluid constantly applied to and vented from opposed chambers

DEFINITION

Classification: 91/47

(under the class definition) Apparatus in which a motor working chamber and working member are in continuous communication with a supply of motive fluid under all conditions of operation of the motor, the movement of the motor working member being controlled by the operation of the motor, the movement of the motor working member being controlled by the operation of an outlet to selectively or adjustably connect said working chamber to a region of continually lower pressure to allow escape of motive fluid, the pressure in said region being constant (e.g., atmospheric).

(1) Note. This definition includes motors in which the supply line is vented upstream of the motor chamber so long as the motor chamber is in constant communication with the pressure source.

(2) Note. The supply of motive fluid under this definition may be atmospheric air in which case the region of lower pressure would be a vacuum.

SEE OR SEARCH THIS CLASS, SUBCLASS:

307, for cyclically operated expansible chamber motors having a distributor motor with constantly applied actuating fluid and controlled venting.

415+, for expansible chamber differential motors in which motive fluid is applied to one working face of a motor to cause motion in one direction and then by-passed to an opposed larger area working face to cause reverse motion while the motive fluid is still being applied to said one face.