US PATENT SUBCLASS 210 / 97
FLOW, FLUID PRESSURE OR MATERIAL LEVEL, RESPONSIVE

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


210 /   HD   LIQUID PURIFICATION OR SEPARATION

97FLOW, FLUID PRESSURE OR MATERIAL LEVEL, RESPONSIVE {14}
98  DF  .~> Fluid current controlled cyclic system
99  DF  .~> Prefilt deverting to drain by prefilt accumulation
100  DF  .~> Flow cut-off requiring reset
101  DF  .~> Proportionate feed means
102  DF  .~> Programming plural units
103  DF  .~> Diverse sensing means {2}
106  DF  .~> Filter cleaning {2}
109  DF  .~> Discharge of treated material {5}
120  DF  .~> Vent control
121  DF  .~> Float {2}
130  DF  .~> Fluid pressure responsive by-pass {3}
134  DF  .~> Plural elements controlled {1}
136  DF  .~> Check valve
137  DF  .~> Maintaining stream pressure or flow

DEFINITION

Classification: 210/97

(under the class definition) Apparatus having means responsive to variations in flow, material level or fluid pressure to control means to effect an operation or change in an operating condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

156+, for a fluid stream or residue operated flume stream type separator.

349, for a filter with pulsation dampening means.

354, for a filter medium or cleaner or agitator moved by fluid.

SEE OR SEARCH CLASS

162, Paper Making and Fiber Liberation,

258, for paper making apparatus having automatic control of stock consistency, and subclass 259 for automatic control of stock feed to the foraminous forming screen.

204, Chemistry: Electrical and Wave Energy,

662, for an electrical or magnetic apparatus to separate or purify a liquid with a control means responsive to a sensed liquid level.