.~ Head-establishing standpipe or expansion chamber (e.g., surge tanks)
DEFINITION
Classification: 137/593
(under subclass 561) Systems comprising an expansion chamber or a vertically extending pipe or tank adapted to be placed in open communication with a source of liquid and functioning as a storage or pressure-maintaining reservoir or to increase the head against which liquid from the source must exert pressure.
(1) Note. This subclass includes patents for extensions attached to the vertical outlets of irrigation pipelines whereby a greater head of water to be discharged may be maintained without overflow, and risers to be attached to basement drains whereby the overflow level of water backing into the drain may be raised.
SEE OR SEARCH THIS CLASS, SUBCLASS:
207, for apparatus for suppressing surges in a liquid in which gas is trapped in a dome over the liquid.
272+, for valved vertically extending delivery risers of the hydrant type.
568, for distribution systems comprising pumps combined with means for reducing surge or pulsations in the liquid being pumped. 777+, for expansible chamber devices, per se.
SEE OR SEARCH CLASS
138, Pipes and Tubular Conduits,
26+, for conduits combined with pressure compensators.
417, Pumps,
540+, for an expansible chamber type pump having fluid pulsation dampening means associated therewith.
