Patent ID: 7540103
Filing Date: 2009-06-02
Classification: E01H

Abstract:
1. A trench blade apparatus for attachment to a front end loader comprising a main rear frame for attachment at the front of said loader, a left blade, a left forward frame in front of said main frame and behind said left blade, spring means connecting said left forward frame to said left blade, a left arm pivotally connecting said main frame to said left forward frame, a first left piston and cylinder pivotally connected at its rearward end to said left arm and its forward end pivotally connected to said left forward frame, a second left piston and cylinder having its one end pivotally connected to said rear main frame and its other end pivotally connected to said left arm; a right blade, a right forward frame in front of said main frame and behind said right blade, spring means connecting said right forward frame to said right blade, a right arm pivotally connecting said main frame to said right forward frame, a first right piston and cylinder pivotally connected at its rearward end to said right arm and its forward end and pivotally connected at its forward end to said right forward frame, a second right piston and cylinder having its one end pivotally connected to said main frame and its other end pivotally connected to said right arm; whereby the left and right forward frames may pivot the right and left blades to various angles on the left and right arms by the first left and right pistons and cylinders and the second left and right piston and cylinders may pivot the left and right arms and thereby the left and right blades to various additional angles and alignments.