US PATENT SUBCLASS 137 / 585
.~.~.~ Tank access opening and bottom outlet

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

561 R  DF  SYSTEMS {32}
583  DF  .~ System with plural openings, one a gas vent or access opening {3}
584  DF  .~.~ Access and outlet {1}
585.~.~.~ Tank access opening and bottom outlet {1}
586  DF  .~.~.~.~> Access opening interlock or telltale on outlet valve actuator

DEFINITION

Classification: 137/585

(under subclass 584) Systems in which the access opening is formed in a tank, such as a tank car, usually comprising a manhole, and in which the outlet is at the bottom of the tank.

(1) Note. The patents herein are directed for the most part to structures comprising a tank car having a valved outlet in the bottom therein and a dome having a manhole at the top of the tank which allows manual access to the valve actuator and/or removal of valve parts.

SEE OR SEARCH THIS CLASS, SUBCLASS:

283+, for hydrants having the valve and valve seat removable through the casing.

326, for containers having means by which a valve at the bottom of a tank can be removed through an opening in the top or by which such removal is facilitated. See (1) Note.

SEE OR SEARCH CLASS

222, Dispensing, 510, for tanks having an outlet element in the bottom and a

controller therefor extending through the tank and operated from the top.

251, Valves and Valve Actuation,

144+, for tanks having the valve actuator passing through the tank, but not emerging through an inlet or manhole.