US PATENT SUBCLASS 166 / 172
.~ Bow spring type

Current as of: June, 1999
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166 /   HD   WELLS

170  DF  BRUSHING, SCRAPING, CUTTING OR PUNCHING-TYPE CLEANERS {6}
172.~ Bow spring type

DEFINITION

Classification: 166/172

(under subclass 170) Devices in which the cleaning element is supported on a bow spring or constitutes a bow spring.

(1) Note. A bow spring is one which is supported at its ends and bulges outwardly at its mid-portion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

241.1, for bow spring centering or friction means which do not have a separate cleaning element or which do not claim a cleaning function, and see the notes to subclass 241.1.