US PATENT SUBCLASS 137 / 272
HYDRANT TYPE

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

272HYDRANT TYPE {15}
273  DF  .~> Water crane type {4}
280  DF  .~> Plural riser
281  DF  .~> Expansible chamber operated by valve actuator for draining riser
282  DF  .~> With pump or ejector
283  DF  .~> Removable valve and valve seat {1}
285  DF  .~> Removable valve with supplemental check valve
286  DF  .~> Movable riser actuated valve {1}
289  DF  .~> Balanced valve
290  DF  .~> Valve actuator extends laterally from bottom of riser
291  DF  .~> Valve actuator outside riser {2}
294  DF  .~> With casing {3}
298  DF  .~> With actuator lubricating means
299  DF  .~> With valve at outlet
300  DF  .~> With supplemental valve
301  DF  .~> Protection against freezing {1}

DEFINITION

Classification: 137/272

(under the class definition) Fluid distributors characterized by a vertical delivery riser with a valve at the bottom, to avoid freezing when installed below the frost line, and an extended actuator for the valve, usually for actuating the valve from a point adjacent the outlet from the riser or an extension thereof.

(1) Note. The common form of this device is the fire hydrant, but railway water cranes, outdoor toilet installations and frost-proof irrigation outlets are included.

SEE OR SEARCH THIS CLASS, SUBCLASS:

364+, for valve and meter wells in which an underground pipe is tapped or controlled, but no flow occurs using the well or a pipe extending vertically through it as a flow path.

SEE OR SEARCH CLASS

166, Wells, 72+, for a well with an above ground means for actuating means in the well.

251, Valves and Valve Actuation,

142+, especially subclasses 145+ and 148+ for well pipe drain valves, many of which have an actuator extending vertically along the pipe to be accessible from the ground level.