A trailer with extendable deck comprising:
- a tow vehicle coupling assembly;
- a bulkhead;
- a left stationary frame rail;
- a right stationary frame rail;
- a plurality of stationary rail cross members;
- a left rail spacer;
- a left rail vertical slide plate;
- a left rail horizontal slide plate;
- a right rail spacer;
- a right rail vertical slide plate;
- a right rail horizontal slide plate, a left sliding frame rail;
- a right sliding frame rail;
- a plurality of sliding rail cross members;
- a plurality of left sliding cross member spacers;
- a plurality of left sliding cross member flat bars;
- a plurality of left sliding cross member slide plates;
- a plurality of right sliding cross member spacers;
- a plurality of right sliding cross member flat bars;
- a plurality of right sliding cross member slide plates, a hydraulic motor;
- a hydraulic motor drive sprocket;
- a hydraulic motor drive chain;
- a front roller chain axle;
- a rear roller chain axle;
- a front roller chain axle drive sprocket;
- a left roller chain;
- a right roller chain;
- a left front roller chain axle sprocket;
- a left rear roller chain axle sprocket;
- a left roller chain connection to first sliding frame rail cross member;
- a right front roller chain axle sprocket;
- a right rear roller chain axle sprocket;
- and a right roller chain connection to first sliding frame rail cross member, wherein,
- said tow vehicle coupling assembly is reversibly attachable to a tow vehicle;
- a said bulkhead is a rigid rectangular cuboid-shaped structural member with has:
- an upper side, a lower side, a left side, a right side, a front side, and a rear side;
- said tow vehicle coupling assembly is rigidly attached to said front side of said bulkhead;
- said left stationary frame rail is an I-beam support member with a length, a width, a height, a longitudinal axis, a latitudinal axis, an inner side, an outer side, an upper side, a lower side, a first end, and a second end;
- said first end of left stationary frame rail is rigidly attached to said rear side of bulkhead;
- said right stationary frame rail is an I-beam support member with a length, a width, a height, a longitudinal axis, a latitudinal axis, an inner side, an outer side, an upper side, a lower side, a first end, and a second end;
- said first end of right stationary frame rail is rigidly attached to said rear side of bulkhead;
- each of said plurality of stationary rail cross members is a section of rigid support structure with a length, a width, a height, a longitudinal axis, a first end, and a second end;
- said first end of each of said plurality of stationary rail cross members is rigidly attached to said inner side of said left stationary frame rail, said upper side of said left stationary frame rail, or said lower side of said left stationary frame rail so that said longitudinal axis of each said stationary rail cross member is perpendicular to said longitudinal axis of said left stationary frame rail;
- said second end of each of said plurality of stationary rail cross members is rigidly attached to said inner side of said right stationary frame rail, said upper side of said right stationary frame rail, or said lower side of said right stationary frame rail so that said longitudinal axis of each said stationary rail cross member is perpendicular to said longitudinal axis of said right stationary frame rail;
- said left rail spacer is a section of rigid support structure with a length, a width, a height, a longitudinal axis, an inner side, an outer side, an upper side, a lower side, a first end, and a second end;
- said inner side of said left rail spacer is rigidly attached to said outer side of said left stationary frame rail so that said first end of said left rail spacer coincides aligns with said first end of said left stationary frame rail, said second end of said left rail spacer aligns with said second end of said left stationary frame rail, and said longitudinal axis of said left rail spacer is parallel with said longitudinal axis of said left stationary frame rail;
- said left rail vertical slide plate is a rigid sheet of low friction material with a length, a height, a thickness, a longitudinal axis, an inner surface, an outer surface, a first end, a second end, an upper edge, and a lower edge;
- said inner surface of said left rail vertical slide plate is rigidly attached to said outer side of said left rail spacer so that said first end of said left rail vertical slide plate is flush with said first end of said left rail spacer, said second end of said left rail vertical slide plate is flush with said second end of said left rail spacer, said lower edge of said left rail vertical slide plate is flush with said lower side of said left rail spacer, and said upper edge of said left rail vertical slide plate is flush with said upper side of said left rail spacer;
- said left rail horizontal slide plate is a rigid sheet of low friction material with a length, a width, a thickness, a longitudinal axis, an upper surface, a lower surface, a first end, a second end, an inner edge, and an outer edge;
- said upper surface of said left rail horizontal slide plate is rigidly attached to said lower side of said left rail spacer so that said first end of said left rail horizontal slide plate is flush with said first end of said left rail spacer, said second end of said left rail horizontal slide plate is flush with said second end of said left rail spacer, and said outer edge of said left rail horizontal slide plate is flush with said outer side of said left rail spacer;
- said right rail spacer is a section of rigid support structure with a length, a width, a height, a longitudinal axis, an inner side, an outer side, an upper side, a lower side, a first end, and a second end;
- said inner side of said right rail spacer is rigidly attached to said outer side of said right stationary frame rail so that said first end of said right rail spacer aligns with said first end of said right stationary frame rail, said second end of right rail spacer aligns with said second end of said right stationary frame rail, and said longitudinal axis of said right rail spacer is parallel with said longitudinal axis of said right stationary frame rail;
- said right rail vertical slide plate is a rigid sheet of low friction material with a length, a height, a thickness, a longitudinal axis, an inner surface, an outer surface, a first end, a second end, an upper edge, and a lower edge;
- said inner surface of said right rail vertical slide plate is rigidly attached to said outer side of said right rail spacer so that said first end of said right rail vertical slide plate is flush with said first end of said right rail spacer, said second end of said right rail vertical slide plate is flush with said second end of said right rail spacer, said lower edge of said right rail vertical slide plate is flush with said lower side of said right rail spacer, and said upper edge of said right rail vertical slide plate is flush with said upper side of said right rail spacer;
- said right rail horizontal slide plate is a rigid sheet of low friction material with a length, a width, a thickness, a longitudinal axis, an upper surface, a lower surface, a first end, a second end, an inner edge, and an outer edge;
- said upper surface of said right rail horizontal slide plate is rigidly attached to said lower side of said right rail spacer so that said first end of said right rail horizontal slide plate is flush with said first end of said right rail spacer, said second end of said right rail horizontal slide plate is flush with said second end of said right rail spacer, and said outer edge of said right rail horizontal slide plate is flush with said outer side of said right rail spacer;
- wherein a stationary ladder assembly is formed comprising:
- said left stationary frame rail;
- said right stationary frame rail;
- said plurality of stationary rail cross members;
- said left rail spacer;
- said left rail vertical slide plate;
- said left rail horizontal slide plate;
- said right rail spacer;
- said right rail vertical slide plate;
- and said right rail horizontal slide plate;
- said left sliding frame rail is an I-beam support member with length, a width, a height, a longitudinal axis, a latitudinal axis, an inner side, an outer side, an upper side, a lower side, a first end, and a second end;
- said right sliding frame rail is an I-beam support member with length, a width, a height, a longitudinal axis, a latitudinal axis, an inner side, an outer side, an upper side, a lower side, a first end, and a second end;
- each of said plurality of sliding rail cross members is length of rigid support structure with a length, a width, a height, a longitudinal axis, an inner side, an outer side, an upper side, a lower side, a latitudinal axis, a first end, and a second end;
- each of said plurality of left sliding cross member spacers is a section of rigid support structure with a length, a width, a thickness, a longitudinal axis, an upper surface, a lower surface, a first end, a second end, a front surface, and a rear surface;
- each of said plurality of left sliding cross member flat bars is a length of rigid support structure with a length, a width, a thickness, a longitudinal axis, an upper surface, a lower surface, a first end, a second end, a front surface, and a rear surface;
- said lower surface of each of said plurality of left sliding cross member flat bar is rigidly attached to said upper surface of one of said plurality of sliding rail cross member so that said first end of said left sliding cross member flat bar is flush with said first end of said sliding rail cross member, said front surface of said left sliding cross member flat bar is flush with said front surface of said sliding rail cross member, and said rear surface of said left sliding cross member flat bar is flush with said rear surface of said sliding rail cross member;
- said upper surface of each of said plurality of left sliding cross member flat bar is rigidly attached to said lower surface of one of said plurality of left sliding cross member spacer so that said first end of said left sliding cross member flat bar is flush with said first end of said left sliding cross member spacer, said front surface of said left sliding cross member flat bar is flush with said front surface of said left sliding cross member spacer, and said rear surface of said left sliding cross member flat bar is flush with said rear surface of said left sliding cross member spacer;
- said upper surface of each of said plurality of left sliding cross member spacer is rigidly attached to said lower side of said left sliding frame rail so that said first end of said left sliding cross member spacer is flush with said first end of said sliding rail cross member, said front surface of said left sliding cross member flat bar is flush with said front surface of said sliding rail cross member, and said rear surface of said left sliding cross member flat bar is flush with said rear surface of said sliding rail cross member;
- each of said plurality of left sliding cross member slide plates is a rigid sheet of low friction material with a length, a width, a thickness, a longitudinal axis, an upper surface, a lower surface, a first end, a second end, a front edge, and a rear edge;
- said lower surface of each of said plurality of left sliding cross member slide plates is rigidly attached to said upper surface of said left sliding member flat bar so that said first end of each of said plurality of left sliding cross member slide plates is flush with said outer side of said left stationary frame rail, said second end of each of said plurality of left sliding cross member slide plates is flush with said inner end of said left stationary frame rail, said front edge of each of said plurality of left sliding cross member slide plates is flush with said front surface of said left sliding cross member flat bar, and said rear edge of each of said plurality of left sliding cross member slide plates is flush with said rear surface of said left sliding cross member flat bar;
- each of said plurality of right sliding cross member spacers is a section of rigid support structure with a length, a width, a thickness, a longitudinal axis, an upper surface, a lower surface, a first end, a second end, a front surface, and a rear surface;
- each of said plurality of right sliding cross member flat bars is a section of rigid support structure with a length, a width, a thickness, a longitudinal axis, an upper surface, a lower surface, a first end, a second end, a front surface, and a rear surface;
- said lower surface of each of said plurality of right sliding cross member flat bar is rigidly attached to said upper surface of one of said plurality of sliding rail cross member so that said first end of said right sliding cross member flat bar is flush with said second end of said sliding rail cross member, said front surface of said right sliding cross member flat bar is flush with said front surface of said sliding rail cross member, and said rear surface of said right sliding cross member flat bar is flush with said rear surface of said sliding rail cross member;
- said upper surface of each of said plurality of right sliding cross member flat bar is rigidly attached to said lower surface of one of said plurality of right sliding cross member spacer so that said first end of said right sliding cross member flat bar is flush with said first end of said right sliding cross member spacer, said front surface of said right sliding cross member flat bar is flush with said front surface of said right sliding cross member spacer, and said rear surface of said right sliding cross member flat bar is flush with said rear surface of said right sliding cross member spacer;
- said upper surface of each of said plurality of right sliding cross member spacer is rigidly attached to said lower side of said right sliding frame rail so that said first end of said right sliding cross member spacer is flush with said second end of said sliding rail cross member, said front surface of said right sliding cross member flat bar is flush with said front surface of said sliding rail cross member, and said rear surface of said right sliding cross member flat bar is flush with said rear surface of said sliding rail cross member;
- each of said plurality of right sliding cross member slide plates is a rigid sheet of low friction material with a length, a width, a thickness, a longitudinal axis, an upper surface, a lower surface, a first end, a second end, a front edge, and a rear edge;
- each of said plurality of right sliding cross member spacers is a section of rigid support structure with a length, a width, a thickness, a longitudinal axis, an upper surface, a lower surface, a first end, a second end, a front surface, and a rear surface;
- each of said plurality of right sliding cross member flat bars is a length of rigid support structure with a length, a width, a thickness, a longitudinal axis, an upper surface, a lower surface, a first end, a second end, a front surface, and a rear surface;
- said lower surface of each of said plurality of right sliding cross member flat bar is rigidly attached to said upper surface of one of said plurality of sliding rail cross member so that said first end of said right sliding cross member flat bar is flush with said second end of said sliding rail cross member, said front surface of said right sliding cross member flat bar is flush with said front surface of said sliding rail cross member, and said rear surface of said right sliding cross member flat bar is flush with said rear surface of said sliding rail cross member;
- said upper surface of each of said plurality right sliding cross member flat bar is rigidly attached to said lower surface of one of said plurality of right sliding cross member spacer so that said first end of said right sliding cross member flat bar is flush with said first end of said right sliding cross member spacer, said front surface of said right sliding cross member flat bar is flush with said front surface of said right sliding cross member spacer, and said rear surface of said right sliding cross member flat bar is flush with said rear surface of said right sliding cross member spacer;
- said upper surface of each of said plurality of right sliding cross member spacer is rigidly attached to said lower side of said right sliding frame rail so that said first end of said right sliding cross member spacer is flush with said second end of said sliding rail cross member, said front surface of said right sliding cross member flat bar is flush with said front surface of said sliding rail cross member, and said rear surface of said right sliding cross member flat bar is flush with said rear surface of said sliding rail cross member;
- each of said plurality of right sliding cross member slide plates is a rigid sheet of low friction material with a length, a width, a thickness, a longitudinal axis, an upper surface, a lower surface, a first end, a second end, a front edge, and a rear edge;
- said lower surface of each of said plurality of right sliding cross member slide plates is rigidly attached to said upper surface of said right sliding member flat bar so that said first end of each of said plurality of right sliding cross member slide plates is flush with said outer side of said right stationary frame rail, said second end of each of said plurality of right sliding cross member slide plates is flush with said inner end of said right stationary frame rail, said front edge of each of said plurality of right sliding cross member slide plates is flush with said front surface of said right sliding cross member flat bar, and said rear edge of each of said plurality of right sliding cross member slide plates is flush with rear surface of said right sliding cross member flat bar;
- wherein a sliding ladder assembly is formed comprising:
- said left sliding frame rail;
- said right sliding frame rail;
- said plurality of sliding rail cross members;
- said plurality of left sliding cross member spacers;
- said plurality of left sliding cross member flat bars;
- said plurality of left sliding cross member slide plates;
- said plurality of right sliding cross member spacers;
- said plurality of right sliding cross member flat bars;
- and said plurality of right sliding cross member slide plates;
- wherein said sliding ladder assembly is slidably attached to said stationary ladder assembly;
- said hydraulic motor is a mechanical actuator that converts hydraulic pressure and flow into torque and angular displacement or rotation;
- said hydraulic motor has a drive shaft that rotates;
- said hydraulic motor is rigidly attached to said bulkhead, said left stationary frame rail, or said right stationary frame rails;
- said hydraulic motor sprocket is a profiled wheel with teeth that mesh with said hydraulic motor drive chain;
- said hydraulic motor sprocket is rigidly attached to said drive shaft on said hydraulic motor;
- said hydraulic motor drive chain is a closed loop of roller chain or a connected flexible series of metal links;
- said front roller chain axle is a central shaft, rod, or spindle;
- said front roller chain axle is pivotally attached to said left stationary frame rail and said right stationary frame rail;
- said rear roller chain axle is a central shaft, rod, or spindle;
- said rear roller chain axle is pivotally attached to said left stationary frame rail and said right stationary frame rail;
- said front roller chain axle drive sprocket is a profiled wheel with teeth that mesh said hydraulic motor drive chain;
- said front roller chain axle drive sprocket is rigidly attached to said front roller chain axle;
- said left roller chain is a closed loop of roller chain or a connected flexible series of metal links;
- said right roller chain is a closed loop of roller chain or a connected flexible series of metal links;
- said left front roller chain axle sprocket is a profiled wheel with teeth that mesh said left roller chain;
- said left front roller chain axle sprocket is rigidly attached to said front roller chain axle;
- said left rear roller chain axle sprocket is a profiled wheel with teeth that mesh with said left roller chain;
- said left rear roller chain axle sprocket is rigidly attached to said front roller chain axle;
- said right front roller chain axle sprocket is a profiled wheel with teeth that mesh said right roller chain;
- said right front roller chain axle sprocket is rigidly attached to said front roller chain axle;
- said right rear roller chain axle sprocket is a profiled wheel with teeth that mesh with said right roller chain;
- said right rear roller chain axle sprocket is rigidly attached to said front roller chain axle;
- said left roller chain connection to front sliding rail cross member is a piece of hardware or bracketry that rigidly attaches said left roller chain to one of said plurality of sliding rail cross members;
- and
- said right roller chain connection to front sliding rail cross member is a piece of hardware or bracketry that rigidly attaches said right roller chain to one of said plurality of sliding rail cross members.