US PATENT SUBCLASS 91 / 511
.~ Condition responsive means for modifying working member operation

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


91 /   HD   MOTORS: EXPANSIBLE CHAMBER TYPE

508  DF  PLURAL RELATIVELY MOVABLE OR RIGIDLY INTERCONNECTED WORKING MEMBERS {11}
511.~ Condition responsive means for modifying working member operation {5}
512  DF  .~.~> Condition is that of a load driven by a working member other than working member having its operation modified
513  DF  .~.~> Condition is position of fluid control member of motor other than motor whose operation is modified
514  DF  .~.~> Pressure responsive valve divides motive fluid between motors {2}
517  DF  .~.~> Condition sensed is working member speed or working fluid pressure of another motor (i.e., fluid pressure or flow to or from expansible chamber of the other motor)
518  DF  .~.~> Motive fluid control valve responsive to pressure in supply line to or exhaust line from motor which it modifies

DEFINITION

Classification: 91/511

Condition responsive means for modifying working member operation:

(under subclass 508) Apparatus having a means for controlling the operation of at least one of the working members in response to a sensed condition external of the motor in which the one working member operates.

(1) Note. Under this subclass the means could include a condition responsive valve in the inlet line from the source to the motor or in the exhaust line downstream from the motor, the condition responsive valve being more than a relief valve connected between the source and the reservoir.

(2) Note. Under this subclass the means could include a means for sensing insufficiency of inlet pressure to at least one working member which means enables compensation for this insufficiency.

(3) Note. Excluded from this subclass are patents having a standby auxiliary pressure source for a working member, which source is activated upon sensing complete failure of its primary source. See subclasses 509+ for such devices.

(4) Note. For the purposes of this and indented subclasses, at least, "motor" is defined as an expansible chamber comprising a space defined by stationary wall member(s) and a movable wall member or the working member which outputs to move a load. Although a motive fluid control valve must be claimed in a patent to be classified herein, as required by the class definition, said valve is not an element in the definition of "motor" for the purpose of this and indented subclasses.

(5) Note. Means "controlling" or "modifying" as used herein includes means by which a working member is caused to start to move, to stop from moving, or to change speed, force or direction of motion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

170+, for means controlling one working member in response to the sensed position of another relatively movable working member. However, control of one working member in response to the sensed angular displacements between rotating plural shafts driven by separate working members are placed in this subclass. 519, for nonrelatively movable intercon- nected working members controlled in response to the position thereof.