Box scraper with plural blades
First Claim
1. An improved box scraper for attachment to a tractor or like vehicular equipment;
- said box scraper comprising;
(a) pair of spaced side plates, each of said side plates having a prescribed height, an upper horizontal edge, a lower horizontal edge adapted to ride on the media being scraped, and opposed first and second vertical side edges;
(b) a first moldboard pivotally mounted between said side plates near the upper horizontal edge adjacent and substantially parallel to said first vertical side edges, and a second moldboard pivotally mounted between said side plates near the upper horizontal edge adjacent and substantially parallel to said second vertical side edges;
(c) said first and second moldboards each being movable, independently of and relative to each other, between a first position depending vertically between said side plates, and a second position pivoted inwardly and upwardly to a position wherein the moldboard lies in a plane substantially parallel to said upper edges of said side plates and the surface being scraped;
(d) moldboard control means for selectively controlling the movement of said moldboards between, the first and second positions;
(e) attachment means for securing said box scraper to said tractor.
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Accused Products
Abstract
A box blade attachment for tractors and like vehicles comprises a box frame which supports, for pivotal movement, a pair of moldboards, horizontally spaced from each other for scraping a surface in either a forward or backward path. Each of the moldboards moves independently of the other between a first position depending vertically between the sidewalls of the frame, and a second position pivoted inwardly and upwardly to lie in a plane substantially parallel to the surface being scraped. Hydraulic moldboard controls in the preferred embodiment synchronize the movement such that the moldboards move, alternatively and relative to each other, between the first and second positions. Thus arranged the box blade can be used in a conventional manner when the vehicle is moving in either direction by raising the appropriate moldboard and lowering the other.
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Citations
12 Claims
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1. An improved box scraper for attachment to a tractor or like vehicular equipment;
- said box scraper comprising;
(a) pair of spaced side plates, each of said side plates having a prescribed height, an upper horizontal edge, a lower horizontal edge adapted to ride on the media being scraped, and opposed first and second vertical side edges; (b) a first moldboard pivotally mounted between said side plates near the upper horizontal edge adjacent and substantially parallel to said first vertical side edges, and a second moldboard pivotally mounted between said side plates near the upper horizontal edge adjacent and substantially parallel to said second vertical side edges; (c) said first and second moldboards each being movable, independently of and relative to each other, between a first position depending vertically between said side plates, and a second position pivoted inwardly and upwardly to a position wherein the moldboard lies in a plane substantially parallel to said upper edges of said side plates and the surface being scraped; (d) moldboard control means for selectively controlling the movement of said moldboards between, the first and second positions; (e) attachment means for securing said box scraper to said tractor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- said box scraper comprising;
Specification