US PATENT SUBCLASS 137 / 625
.~ Multi-way valve unit

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

561 R  DF  SYSTEMS {32}
625.~ Multi-way valve unit {12}
625.11  DF  .~.~> Sequential distributor or collector type
625.12  DF  .~.~> Sequentially progressive opening or closing of plural ports {1}
625.17  DF  .~.~> Selective reciprocation or rotation
625.18  DF  .~.~> Plural noncommunicating flow paths {1}
625.2  DF  .~.~> Supply and exhaust {4}
625.28  DF  .~.~> Dividing into parallel flow paths with recombining {4}
625.4  DF  .~.~> Multiple inlet with single outlet {1}
625.42  DF  .~.~> Selective opening of plural ports
625.43  DF  .~.~> Four port reversing valves
625.44  DF  .~.~> Pivoted valve unit {1}
625.46  DF  .~.~> Rotary valve unit {1}
625.48  DF  .~.~> Reciprocating valve unit {2}

DEFINITION

Classification: 137/625

(under subclass 561) Subject matter in which a single valve controlling communication with three or more flow lines, has its actuator or actuator so arranged or related as to determine or aid in the determination of the relative order, duration or magnitude of flow through each of the several flow lines.

(1) Note. See the class definition, Lines With Other Classes and Within this Class, (2) Plural Valves, and Subclass References to the Current Class, for collected search notes on plural actuators for valves and actuators for plural valves.

SEE OR SEARCH THIS CLASS, SUBCLASS:

506, for plural condition responsive valves, at least one of which has a separate reactor surface.

512+, for plural condition responsive valves of the direct acting type.

561+, for distribution systems involving plural valves, with or without their actuators, in combination with flow containing means more extensive than that required to mount the valves. SEE OR SEARCH CLASS

192, Clutches and Power-Stop Control,

87.13, and 87.18 for a multiway valve used to distribute fluid pressure to multiple clutches.