Patent ID: 6601827
Filing Date: 2003-08-05
Classification: B66F

Abstract:
An economical lifting device comprising:a base having a rectangular bottom with a forward end and a rearward end, a rear flange extending upward from the bottom and having a central aperture therein, and left and right side flanges extending upward from the bottom with each side flange having an aperture near the forward end thereof and having an increased thickness along the upper portion thereof providing a longitudinal recess formed along the lower portion on the inner surface of the flange; a screw threaded actuator shaft having a distal end and a proximal end extending through the aperture of the rear flange of said base, with the proximal end rotatably retained within the aperture and further adapted to be engageable by an external handle to facilitate rotation of the shaft; a sliding block having a rectangular bottom, left and right sides slideably retained within the longitudinal recesses of the side flanges of said base, and having a forward end and a rearward end with a central threaded aperture therein for receiving the forward end of said actuator shaft; a pair of lift arms acting in parallel having forward ends and rearward ends with each rearward end pivotally attached to the respective side of said block; a pair of connecting arms acting in parallel each having a forward end pivotally attached at the respective aperture near the forward ends of the respective side flange of said base, and having a rearward end pivotally attached at a pivot point on said lift arm, with the pivot point at a distance from the rearward end of said lift arm that is about equal to the length of said connecting arm; a lifting pad attached to the forward ends of said lift arms and adapted to provide a level lifting platform thereon.