Patent ID: 7413167
Filing Date: 2008-08-19
Classification: B66F

Abstract:
1. A trunk jack comprising: a rectangular frame base with a forward end having a horizontal forward support plate and a rearward end having a vertical rear plate with a central aperture for receiving an actuator shaft therein, and having a left shoe with a forward portion welded to said forward support plate and a rearward end having an inward flange bolted to said rear plate, and with a longitudinal track on the inner side thereof, and having a right shoe with a forward portion welded to said forward support plate and a rearward end having an inward flange bolted to said rear plate and with a longitudinal track on the inner side thereof; the longitudinal track on the inner side of the shoe is formed by an upper flange thereon folded-over inwardly into a double thickness upper guide path, and a lower guide plate is welded to the left shoe to provide a lower guide path of the longitudinal track, and wherein the longitudinal track on the inner side of the right shoe formed by an upper flange thereon folded-over inwardly into a double thickness upper guide path, and a lower guide plate is welded to the right shoe to provide a lower guide path of the longitudinal track; a screw-threaded actuator shaft having a distal portion and a proximal end extending through the aperture of the rear plate with the proximal end rotatably retained within the aperture and further for use with an external handle to facilitate rotation thereof; a lateral axel having a central threaded aperture therein for receiving the distal end of said threaded actuator shaft; and having guide caps extending from the ends thereof into the respective left and right longitudinal track of the shoes, with said lateral axel slidably retained within the longitudinal tracks; a pair of lift arms, acting in parallel, each having a forward end and a rearward end with the rearward end pivotally attached to said lateral axel adjacent the respective guide cap; a pair of connecting arms, acting in parallel, each having a forward end pivotally attached near the forward end of the respective left shoe and right shoe of said frame base, and having a rearward end pivotally attached at a pivot point on said lift arm; and a lifting plate pivotally attached to the forward ends of said lift arms for providing a level lifting platform thereon.