Patent ID: 6796762
Filing Date: 2004-09-28
Classification: E02F

Abstract:
A boom and linkage mechanism for a skid-steer loader comprising:a frame having a lower right and a lower left side; a right and a left loader arm located respectively on said lower right and lower left sides of the frame, each of said right and left loader arms having a forward and a rearward end; an implement vertically pivotally mounted to said forward ends; a pair of tilt actuators respectively connected between said forward ends and the implement; a right forward guide link having a first right lower end portion pivotally connected to the lower right side of the frame and a first right upper end portion pivotally connected substantially between said forward and rearward ends of said right loader arm; a left forward guide link having a first left lower end portion pivotally connected to the lower left side of the frame and a first left upper end portion pivotally connected substantially between said forward and rearward ends of said left loader arm; a right rearward guide link having a second right lowered portion pivotally connected substantially proximate to a rear of the lower right side of the frame and a second right upper end portion pivotally connected substantially proximate to said rearward end of said right loader arm, said second right lower end portion being substantially lower than said first right lower end portion; a left rearward guide link having a second left lower end portion pivotally connected substantially proximate to a rear of the lower left side of the frame and a second left upper end portion pivotally connected substantially proximate to said rearward end of said left loader arm, said second left lower end portion being substantially lower than said first left lower end portion; a right lift actuator having a first right lower cylinder portion pivotally connected to the lower right side of the frame between said first right lower end portion and said second right lower end portion, and a first right upper rod portion pivotally connected substantially between said first right upper end portion and said second right upper end portion; and a left lift actuator having a first left lower cylinder portion pivotally connected to the lower left side of the frame between said first left lower end portion and said second left lower end portion, and a first left upper rod portion pivotally connected substantially between said first left upper end portion and said second left upper end portion; wherein said pair of lift actuators extend and retract to raise said pair of loader arms such that the implement moves between a fully lowered position and a fully raised position; and wherein said fully raised position is located substantially vertically above said fully lowered position.