Hinged bulldozer blade

A selectively adjustable bulldozer blade, comprising:

• a central blade body adapted for mounting to a bulldozer and having a forward concave face;
• blade end sections mounted to the blade body at opposite ends thereof for pivotal movement thereon about parallel upright axes;
• said blade sections having forward concave faces matching the concave curvature of the body face;
• complementary hinge members interconnecting the sections with the body ends to prevent formation of a gap between the sections and body when the sections are pivoted relative to the body;
• jack means selectively operable to pivot the blade sections independently of one another to selected angular positions relative to the angular dispostion of the blade body;
• lockout means interconnected between the jack means and blade end sections and blade body for selectively fixing the blade end sections in prescribed angular positions and releasing the blade end sections for pivotal movement upon operation of the jack means;
• said lockout means being comprised of:
• successive catch surfaces on the blade body ends;
• a pivoted lug on each blade section selectively engageable with the catch surfaces;
• a lost motion actuator means on each blade end section operatively connected to the jack means and engageable with the pivoted lug for selectively disengaging the pivoted lug from the catch surfaces to allow pivotal movement of the blade end sections in response to operation of the jack means.