US PATENT SUBCLASS 137 / 148
.~.~.~ Piston


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

123  DF  SIPHONS {8}
142  DF  .~ With flow starting, stopping or maintaining means {7}
147  DF  .~.~ Pump or liquid displacement device for flow passage {2}
148.~.~.~ Piston {1}
149  DF  .~.~.~.~> Co-axial within flow passage


DEFINITION

Classification: 137/148

(under subclass 147) Apparatus in which the pump includes a piston.

SEE OR SEARCH CLASS

4, Baths, Closets, Sinks, and Spittoons,

373, for water closet flushing tanks having a siphon outlet which is started by a piston or its equivalent.