.~.~> Scraper part rearranged upon reverse movement
DEFINITION
Classification: 172/26.5
(under subclass 23) Apparatus comprising a scraper that is adapted to be connected by a cable or the like flexible means to a fixed structure so as to be driven relative to said structure.
(1) Note. The scraper in this definition comprises an approximately vertically disposed blade for smoothing the earth or for cutting into the earth and pushing earth ahead of it in order to move the material from one location to another. The disclosed use may be for scraping earth beneath a body of water or scraping material from a vertical wall. The blade may have spaced teeth, though usually it has a straight edge.
(2) Note. Patents are considered to come under this definition if they are disclosed as intended to be used with a fixed structure, no special limitation being required in the claims. Use with a fixed structure is considered to be established if it is clear from the disclosure that the scraper is dragged back as well as forward by a cable or the like and there is nothing in the disclosure inconsistent with the cable or the like for forward motion being a drag line.
SEE OR SEARCH CLASS
37, Excavating,
394+, for cable- operated excavating apparatus comprising more than a scraper, per se, and nominally recited hauling cables or like flexible means connected thereto, subclasses 398+ for cable operated wheeled scoops and subclasses 398+ for cable operated scoops. A scoop differs from a scraper in that it has a bottom wall which carries material to be transported, whereas a scraper relies on the surface over which it is moving to support material which it is transporting.
