Ronald E Babcock, Age 79Kent, WA

4420949, Dec 20, 1983

Jun 23, 1982

6/391460

Don S. Bartholmey - Bellevue WA
Ronald D. Babcock - Seattle WA
George L. Weisel - Seattle WA

North Star Ice Equipment Corporation - Seattle WA

F25C 114

62354

A plurality of knives (100) carried by driven means (36) to travel in circular paths along an inside, cylindrical freezing surface (16) of a refrigerated double-walled drum (12) to remove salt water ice formed thereon. A substantially flat lower surface (122) extends along the bottom of a knife leading section (106) and a substantially flat lower surface (124) extends along the bottom of a knife trailing section (108). In a direction transversely to the length of knife (100), the leading and trailing lower surfaces (122, 124) are disposed substantially normal to the drum freezing surface (16), and in the direction extending rearwardly along the length of knife (100), the leading lower surface (122) is inclined slightly downwardly from the horizontal while the trailing lower surface (124) is inclined downwardly at an angle substantially greater than the angle of inclination of the lower leading surface (122). A thin ice engaging outer edge (112) extends along the radially outward portion portions of the knife leading and trailing lower surfaces (122, 124) in a continuous arc closely corresponding to the circumference of the drum freezing surface (16).