Patent ID: 8220560
Filing Date: 2012-07-17
Classification: A01B,E02F

Abstract:
1. In combination: a tractor having a forward end, a rearward end, a first side, a second side, and an underside; a plow blade having a front side, a back side, a first end, a second end, an upper end, and a lower end; a first attachment frame means having a forward end, a rearward end, a first side and a second side; said first attachment frame means including a first attachment frame and a second attachment frame; each of said first and second attachment frames having a forward end, a rearward end, a first side and a second side; said first attachment frame being secured to said back side of said plow blade; said forward end of said second attachment frame being pivotally secured, about a vertical axis, to said first attachment frame; a first hydraulic cylinder secured to and extending between said first side of said second attachment frame means and said first side of said first attachment frame for pivotally moving said first attachment frame and said plow blade with respect to said forward end of said second attachment frame; a second hydraulic cylinder secured to and extending between said second side of said second attachment frame means and said second side of said first attachment frame for pivotally moving said first attachment frame and said plow blade with respect to said forward end of said second attachment frame; said first and second hydraulic cylinders being movable between retracted and extended positions; said first and second hydraulic cylinders being fluidly connected so that when said first hydraulic cylinder is extending, said second hydraulic cylinder is retracting and so that when said first hydraulic cylinder is retracting, said second hydraulic cylinder is extending; a second attachment frame means having a forward end, a rearward end, a first side and a second side; said rearward end of said second attachment frame means being selectively removably secured to said tractor at the underside thereof rearwardly of the forward end thereof; said forward end of said second attachment frame means being pivotally secured, about a horizontal axis, to said rearward end of said second attachment frame; said second attachment frame means including a first upstanding post having upper and lower ends and a second upstanding post having upper and lower ends; said first and second upstanding posts extending upwardly from said forward end of said second attachment frame means in a horizontally spaced-apart manner; a third hydraulic cylinder secured to and extending between said first upstanding post and said second attachment frame; a fourth hydraulic cylinder secured to and extending between said second upstanding post and said second attachment frame; said third and fourth hydraulic cylinders being movable between extended and retracted positions; the retraction of said third and fourth hydraulic cylinders causing said plow blade to be raised with respect to said second attachment frame means; the extension of said third and fourth hydraulic cylinders causing said plow blade to be lowered with respect to said second attachment frame means; a horizontally disposed first support secured to and extending between said first and second upstanding posts; a mounting assembly secured to said first support; said mounting assembly including a top wall having a forward end, a rearward end, a first end, a second end, an upper side and a lower side; said mounting assembly also having a front wall, having upper and lower ends, which extends downwardly from said top wall adjacent said forward end thereof; said mounting assembly further including a bottom wall which extends rearwardly from said lower end of said front wall; said mounting assembly having an elongated rod secured to lower side of said top wall at said rearward end of said top wall; a first elongated side plate, having rearward and forward ends, secured to said first side of said tractor; a second elongated side plate, having rearward and forward ends, secured to said second side of said tractor; a weight mount secured to said forward ends of said first and second side plates and extending therebetween; said weight mount including a forward end, a rearward end, an upper end, and a lower end; said weight mount having an elongated transversely extending rod secured thereto at the upper forward end thereof; said mounting assembly being selectively removably mounted on said weight mount; said elongated rod of said mounting assembly being positioned on said upper end of said weight mount rearwardly of said elongated rod on said weight mount and in engagement therewith when said first mounting assembly is mounted on said weight mount; said bottom wall of said first mounting assembly extending rearwardly beneath said lower end of said weight mount when said mounting assembly is mounted on said weight mount.