Box blade with movable closure blade

A box blade assembly for attachment to earth-moving vehicles comprising;

• a box blade frame having two spaced parallel side walls, an open top and bottom, an open front end, a horizontal crossbeam extending transversely between said side walls near said open top and front ends, and a rear wall extending transversely between said side walls, the bottom edge of said rear wall terminating above the bottom edge of said side walls,
• an inwardly facing scraper member secured on said box blade rear wall and extending below the bottom edge of said side walls, and
• a trailing back fill member pivotally mounted on and carried by said rear wall,
• a closure member extending transversely between said side walls and movably supported thereon and movable between an open position substantially exposing said open bottom and a closed position substantially enclosing said open bottom,
• said closure blade comprising two spaced parallel side walls of flat arcuate configuration, a semi-cylindrical wall secured to the curved portion of said side walls and extending transversely therebetween and having a connector member in the semi-cylindrical wall thereof, and one longitudinal edge of said closure blade abutting an upper portion of said rear wall of said box blade frame in the open position and another longitudinal edge of said closure blade abutting a lower portion of said rear wall in the closed position,
• said box blade frame including a supporting frame extending from the top portion thereof, and
• means for moving said closure member between an open and a closed position comprising a fluid-actuated cylinder and operating piston connected one to said connector member and the other to said supporting frame on said box blade frame.

A box blade assembly for attachment to earth-moving vehicles comprising;

• a box blade frame having two spaced parallel side walls, an open top and bottom, an open front end, a horizontal crossbeam extending transversely between said side walls near said open top and front ends, and a rear wall extending transversely between said side walls, the bottom edge of said rear wall terminating above the bottom edge of said side walls,
• an inwardly facing scraper member secured on said box blade rear wall and extending below the bottom edge of said side walls, and
• a trailing back fill member pivotally mounted on and carried by said rear wall,
• a closure member extending transversely between said side walls and movably supported thereon and movable between an open position substantially exposing said open bottom and a closed position substantially enclosing said open bottom,
• said closure blade comprising two spaced parallel side walls of flat arcuate configuration, a semi-cylindrical wall secured to the curved portion of said side walls and extending transversely therebetween and having a connector member in the semi-cylindrical wall thereof, and one longitudinal edge of said closure blade abutting an upper portion of said rear wall of said box blade frame in the open position and another longitudinal edge of said closure blade abutting a lower portion of said rear wall in the closed position,
• said box blade frame including a supporting frame extending from the top portion thereof,
• an operating lever member pivotally supported on said supporting frame and having an operating end connected to said connector member, and
• means for moving said closure member between an open and a closed position comprising a fluid-actuated cylinder and operating piston connected one to said box blade frame and the other to said supporting frame.