US PATENT SUBCLASS 60 / 459
.~ Condition responsive control of motive fluid flow

Current as of: June, 1999
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60 /   HD   POWER PLANTS

325  DF  PRESSURE FLUID SOURCE AND MOTOR {47}
459.~ Condition responsive control of motive fluid flow {8}
460  DF  .~.~> Holding or braking valve in motor exhaust line controlled by pressure in motorfeed line
461  DF  .~.~> Discharge from contracting cylinder of double-acting motor controlled
462  DF  .~.~> With externally operable multiwasy valve means directing flow to a stroke device {1}
464  DF  .~.~> Of motive fluid transfer between a reservoir and a recirculating path of a pump motor loop
465  DF  .~.~> Having externally operable means for setting motor or pump displacement or direction of rotation
466  DF  .~.~> Of braking or holding valve in motor discharge line
467  DF  .~.~> Stroke cylinder open to exhaust responsive to position of output member
468  DF  .~.~> Of by-pass of motor, pump or flow control element

DEFINITION

Classification: 60/459

(under subclass 325) Apparatus having structure sensing a condition of the apparatus or an external condition and effecting a control of a flow or condition of the motive fluid of the apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:

369, in which motive fluid is controlled to produce an oscillating or reciprocating cycle of a stroke device;

403+, for a system with means responsive to breakage,

plugging, mechanical failure or power failure;

420+, for a condition responsive control in a system having plural motors;

428+, for a condition responsive control in a system having plural pumps; and 431+, for the joint control of motive fluid flow and of the input to a motor driving the pump.

SEE OR SEARCH CLASS

91, Motors: Expansible Chamber Type,

392+, for a motor with a working member responsive motive fluid control means; and 418, for a motor having a motive fluid control valve.

417, Pumps,

279+, for a pump with condition responsive pumped fluid control.