Patent ID: 8047759
Filing Date: 2011-11-01
Classification: B66F,Y10T

Abstract:
1. A manual fork lift system for lifting and transporting a cargo, the manual fork lift system comprising: a frame comprising a base, a mast coupled with the base, an extendable boom pivotally coupled with the mast, and an engagement mechanism pivotally coupled with the extendable boom, wherein the extendable boom includes a proximal support element and a distal support element that is slidably engaged with the proximal support element; a first single-action hydraulic jack comprising a base and a ram, wherein the base of the first single-action hydraulic jack is pivotally coupled with the base of the frame, and the ram of the first single-action hydraulic jack is pivotally coupled with the extendable boom of the frame; and a second single-action hydraulic jack comprising a base and a ram, wherein the base of the second single-action hydraulic jack is pivotally coupled with a lower portion of the engagement mechanism of the frame via a first adjustable coupling mechanism, and the ram of the second single-action hydraulic jack is pivotally coupled with the extendable boom of the frame via a second adjustable coupling mechanism, wherein the first adjustable coupling mechanism allows the base of the second single-action hydraulic jack to be translationally adjusted alone a length of the engagement mechanism, wherein the second adjustable coupling mechanism allows the ram of the second single-action hydraulic jack to be adjustably positioned along a length of the extendable boom; and wherein the boom comprises a forward section, the engagement mechanism comprises an upper section, and the boom forward section and the engagement mechanism upper section are coupled via a hinge.