US PATENT SUBCLASS 165 / DIG 90
.~.~ Scraper blade movable relative to scraper blade support (e.g., pivoting blade, rocking blade, etc.)


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165 /   HD   HEAT EXCHANGE

DIG 76  DD  WITH SCRAPER FOR REMOVING PRODUCT FROM HEAT TRANSFER SURFACE {4}
DIG 81  DD  .~ Rotary heat exchange scraper or scraper for rotary heat exchange surface {10}
DIG 90.~.~ Scraper blade movable relative to scraper blade support (e.g., pivoting blade, rocking blade, etc.)