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The pull and lift system for transporting roofing materials includes a pull bar upon a flat bed of a truck, two rams connecting to the pull bar, controls for the rams, two pairs of mutually spaced apart legs, a table connecting between the pairs of legs, at least one ram connecting to the table, and

The pull and lift system for transporting roofing materials includes a pull bar upon a flat bed of a truck, two rams connecting to the pull bar, controls for the rams, two pairs of mutually spaced apart legs, a table connecting between the pairs of legs, at least one ram connecting to the table, and controls for this ram. The first controls engage the pull bar against a pallet then draw it towards the table. The pull bar has an L shaped cross section with the lower portion sliding upon the flat bed and the upper portion engaging a pallet. The table has a first position coplanar with the flat bed and a second position above the flat bed and proximate a conveyor. The table elevates, while loaded with cargo, and remains level during its transition from the first position to the second position.

대표청구항 ▼

1. A system for transferring construction materials, such as palletized roofing, upon a flat bed truck, from a first position adjacent to a headboard of the truck and upon the bed to a second position rearwardly of the headboard of the truck and elevated above the bed, comprising: a lift table exten

1. A system for transferring construction materials, such as palletized roofing, upon a flat bed truck, from a first position adjacent to a headboard of the truck and upon the bed to a second position rearwardly of the headboard of the truck and elevated above the bed, comprising: a lift table extending transverse to said bed, said lift table having less width and less length than said truck flat bed, said lift table being positioned approximately in the center of the length of the bed, and said lift table maintaining the construction materials parallel to the bed during usage;said lift table having a first lowered position coplanar with the bed and a second elevated position above the bed and rearwardly from the headboard;at least one pair of legs pivotally connecting said lift table to said bed wherein said at least one pair of legs rotate from being within the bed as said lift table is in said first lowered position to being perpendicular to the bed as said lift table is in said second elevated position;an elevating assembly locating beneath the bed operatively connecting to said lift table wherein said elevating assembly raises and lowers said lift table between said first lowered position and said second elevated position;said elevating assembly having a pair of lift arms pivotally connecting to said lift table and adapted to pivotally connect to frame rails of the truck, said pair of lift arms rotating about an axis perpendicular to the length of the bed;each of said lift arms having a generally arcuate member with a first tab and an opposite second tab, said first tab is adapted to pivotally connect to frame rails of the truck and said second tab pivotally connecting to said lift table;each of said members avoiding contacting the bed as said lift table extends slightly over said bed rearwardly;each of said members having a notch proximate said second tab wherein said notch avoids contacting said lift table when in said second elevated position and is adapted to avoid contacting the truck bed when in said first lowered position;said first tabs of said lift arms operatively connecting to a power source; andsaid power source being one of a hydraulic motor, a pneumatic motor, an electric motor, and a hydraulic assembly wherein said hydraulic assembly includes at least one strut locating beneath said bed generally perpendicular to the length of the bed and at least one single stage ram. 2. A system for transferring construction materials, such as palletized roofing, upon a flat bed truck, from a first position adjacent to a headboard of the truck and upon the bed to a second position rearwardly of the headboard of the truck and elevated above the bed, comprising: a lift table locating within the bed, said lift table having spaced apart supporting legs locating towards the front of the bed, said lift table being parallel to said bed and away from the headboard;a pull bar extending transversely on the truck bed having a first extended position at the first position adjacent to the headboard of the bed and a second retracted position on the bed adjacent to said lift table, and longitudinally spaced on said truck bed from the headboard;means for transferring said pull bar from said first position to said second position without detaching from said pull bar and said means for transferring locating within the bed while avoiding interference with the bed, said means for transferring including a first set of two mutually parallel spaced apart single stage hydraulic rams, said rams connecting to said pull bar and remaining connected to said pull bar during movement from said first extended position to said second retracted position; and,means for elevating the lift table from said second position rearwardly of the headboard of the truck to a third position without tipping the materials, said third position being elevated with respect to said second position and said truck bed, and said means for elevating extending from a location within the truck bed, said means for elevating including a second set of two mutually parallel spaced apart single stage hydraulic rams rotating about a common axis;said elevating means further including a pair of lift arms pivotally connecting to said lift table and adapted to pivotally connect to frame rails of the truck,said lift arms rotating about an axis perpendicular to the length of the bed;each of said lift arms having a generally arcuate member with a first tab and an opposite second tab, said first tab is adapted to pivotally connect to frame rails of the truck and said second tab pivotally connecting to said lift table;each of said members avoiding contacting the bed as said lift table extends slightly over said bed rearwardly; and,each of said members having a notch proximate said second tab wherein said notch avoids contacting said lift table when elevated and is adapted to avoid contacting the truck bed when in said first lowered position.