(under subclass 223) Apparatus wherein the blade has an abrasion resistant liner, sheathing or insert secured to a portion thereof normally subject to erosive deterioration.
(1) Note. The abrasion resistant means must be supplemental to basic blade forming structure and a specifically claimed blade structure accompanied by a mere disclosure that the outer blade surface is resistant to wear is properly classified elsewhere on the basis of the particular blade structure defined.
SEE OR SEARCH THIS CLASS, SUBCLASS:
229+, for a laminated or encased material blade wherein the outer layer or covering may be disclosed as resistant to abrasion.
241+, for a blade coating or composition which may be disclosed as resistant to abrasion.
