(under subclass 781) Apparatus in which the scraper or a portion of the scraper is movably mounted relative to the vehicle frame and there is a resilient means for yieldably urging said scraper or portion into ground contact.
(1) Note. The resilient means is considered to yieldably urge the scraper or scraper portion into ground contact even if it is disclosed as used so that it does not urge the scraper or part in a vertical direction against the ground but instead yieldably urges the scraper or part against an obstacle on the ground when the scraper or part is traversing the ground and contacts the obstacle in the path of traverse.
