US PATENT SUBCLASS 91 / 418
WITH MOTIVE FLUID VALVE

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

418WITH MOTIVE FLUID VALVE {32}
419  DF  .~> Responsive to (1) motive fluid temperature or state, or (2) motor position or orientation
420  DF  .~> Contracting chamber exhaust valve controlled by expanding chamber pressure or flow
421  DF  .~> Expanding chamber inlet controlled by contracting chamber pressure or flow
422  DF  .~> Valved piston (222)
423  DF  .~> Valve part forms traversed movable portion of working chamber wall (276)
424  DF  .~> Two hand control {1}
426  DF  .~> With fluid pressure holding means for valve
427  DF  .~> Plural manual control stations
428  DF  .~> Manual control carried on or operated from load or output element
429  DF  .~> Dither valve
430  DF  .~> Valve parts continuously relatively moved for nonvalving function
431  DF  .~> Continuous motive fluid flow through chamber in motor idle condition
432  DF  .~> Inlet check valve with means for disconnectable supply line (468)
433  DF  .~> Both inlet and exhaust controlled by motive fluid pressure in supply line or chamber {1}
435  DF  .~> Controlled by rate of movement of working member
436  DF  .~> Inlet fluid supplemented by controlled fluid pressurized in opposed contracting chamber
437  DF  .~> Independent control of bypass between opposed working chambers {1}
440  DF  .~> For exhausting contracting working chamber to expanding opposed nonworking
441  DF  .~> With ambient fluid inlet valve to expanding working chamber
442  DF  .~> Self-opening exhaust valve held closed by inlet pressure (268)
443  DF  .~> To provide unequal inlet and exhaust flow rates to single working chamber
444  DF  .~> Relatively movable serial valves {3}
449  DF  .~> Plural separately controlled waste passages for single working chamber {2}
453  DF  .~> Plural actuators for single valve means (367)
454  DF  .~> Relatively movable inlet and exhaust valves for single working chamber {3}
458  DF  .~> Speed governor operated (366)
459  DF  .~> Electrically operated (275) (361)
460  DF  .~> Pulsator actuator for valve (280)
461  DF  .~> Pilot valve (304)
462  DF  .~> For double-acting motor {4}
468  DF  .~> Self-acting valve (432) (446) (451) (452)
469  DF  .~> Unitary inlet and exhaust valve for single working chamber {1}

DEFINITION

Classification: 91/418

(under the class definition) Apparatus including valve means to control the flow of motive fluid to or from the motor or while in the motor so as to provide a control of the motor.

(1) Note. The valve means may be, for example, a distributing valve, throttle valve, pressure relief or check valve or a pressure reducing valve. A mere fixed orifice which provides a throttling action is not considered to be a valve, but a controllable throttle is considered to be a valve even though it may not be capable of being completely cut off.

(2) Note. Patents disclosing a cyclically operable motor in which the claims are directed to any of the motor operated valve actuating means are classified in subclasses 218+.

(3) Note. The following definitions of terms are applicable to this and indented subclasses.

(a)

Inlet and Exhaust Valve - A valve for connecting three lines; a pressure line, a motor line and an exhaust line; the valve being settable in any of three positions, namely, with the pressure line connected to the motor line, with the motor line connected to the exhaust line and with the motor line cut off. The valve may comprise a single unitary member or relatively movable separate valving elements.

(b) Stop Valve - A valve in any line which is capable of being closed to stop the flow in both directions in that line. A stop valve may also be a throttling valve so long as it is capable of being completely closed.

(c)

Check Valve - A direction responsive valve which when placed in line is designed to prevent any flow in one direction and allow substantially free, unimpeded flow in the opposite direction.