US PATENT SUBCLASS 165 / DIG 57
.~.~.~ Flexing tubesheet

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

Internet Version by PATENTEC © 1999      Terms of Use


165 /   HD   HEAT EXCHANGE

DIG 51  DD  HAVING EXPANSION AND CONTRACTION RELIEVING OR ABSORBING MEANS {2}
DIG 52  DD  .~ For cylindrical heat exchanger {6}
DIG 53  DD  .~.~ Flexible or movable header or header element {3}
DIG 57.~.~.~ Flexing tubesheet