US PATENT SUBCLASS 251 / 211
SERIAL ALTERNATELY CLOSED PORTS

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

Internet Version by PATENTEC © 1999      Terms of Use


251 /   HD   VALVES AND VALVE ACTUATION

211SERIAL ALTERNATELY CLOSED PORTS

DEFINITION

Classification: 251/211

(under the class definition) Valve units comprising a single flow path provided with a pair of serially arranged seat members with which plural seat-engaging elements of a single valve head alternately cooperate.