A trailer with extendable deck comprising:
- a tow vehicle coupling assembly;
- a bulkhead [14];
- a left stationary frame rail [30];
- a right stationary frame rail [32];
- a plurality of stationary rail cross members [34];
- a left rail spacer [36];
- a left rail vertical slide plate [38];
- a left rail horizontal slide plate [40];
- a right rail spacer [42];
- a right rail vertical slide plate [44];
- a right rail horizontal slide plate [46], a left sliding frame rail [50];
- a right sliding frame rail [52];
- a plurality of sliding rail cross members [54];
- a plurality of left sliding cross member spacers [56];
- a plurality of left sliding cross member flat bars [58];
- a plurality of left sliding cross member slide plates [60];
- a plurality of right sliding cross member spacers [62];
- a plurality of right sliding cross member flat bars [64];
- a plurality of right sliding cross member slide plates [66], a hydraulic motor [80];
- a hydraulic motor drive sprocket [82];
- a hydraulic motor drive chain [84];
- a front roller chain axle [90];
- a rear roller chain axle [92];
- a front roller chain axle drive sprocket [94];
- a left roller chain [96];
- a right roller chain [98];
- a left front roller chain axle sprocket [100];
- a left rear roller chain axle sprocket [102];
- a left roller chain connection to first sliding frame rail cross member [106];
- a right front roller chain axle sprocket [110];
- a right rear roller chain axle sprocket [112];
- and a right roller chain connection to first sliding frame rail cross member [116], wherein,
- said tow vehicle coupling assembly is reversibly attachable to a tow vehicle;
- a said bulkhead [14] 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 [14];
- said left stationary frame rail [30] 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 [30] is rigidly attached to said rear side of bulkhead [14];
- said right stationary frame rail [32] 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 [32] is rigidly attached to said rear side of bulkhead [14];
- each of said plurality of stationary rail cross members [34] 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 [34] is rigidly attached to said inner side of said left stationary frame rail [30], said upper side of said left stationary frame rail [30], or said lower side of said left stationary frame rail [30] so that said longitudinal axis of each said stationary rail cross member [34] is perpendicular to said longitudinal axis of said left stationary frame rail [30];
- said second end of each of said plurality of stationary rail cross members [34] is rigidly attached to said inner side of said right stationary frame rail [32], said upper side of said right stationary frame rail [32], or said lower side of said right stationary frame rail [32] so that said longitudinal axis of each said stationary rail cross member [34] is perpendicular to said longitudinal axis of said right stationary frame rail [32];
- said left rail spacer [36] 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 [36] is rigidly attached to said outer side of said left stationary frame rail [30] so that said first end of said left rail spacer [36] coincides aligns with said first end of said left stationary frame rail [30], said second end of said left rail spacer [36] aligns with said second end of said left stationary frame rail [30], and said longitudinal axis of said left rail spacer [36] is parallel with said longitudinal axis of said left stationary frame rail [30];
- said left rail vertical slide plate [38] 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 [38] is rigidly attached to said outer side of said left rail spacer [36] so that said first end of said left rail vertical slide plate [38] is flush with said first end of said left rail spacer [36], said second end of said left rail vertical slide plate [38] is flush with said second end of said left rail spacer [36], said lower edge of said left rail vertical slide plate [38] is flush with said lower side of said left rail spacer [36], and said upper edge of said left rail vertical slide plate [38] is flush with said upper side of said left rail spacer [36];
- said left rail horizontal slide plate [40] 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 [40] is rigidly attached to said lower side of said left rail spacer [36] so that said first end of said left rail horizontal slide plate [40] is flush with said first end of said left rail spacer [36], said second end of said left rail horizontal slide plate [40] is flush with said second end of said left rail spacer [36], and said outer edge of said left rail horizontal slide plate [40] is flush with said outer side of said left rail spacer [36];
- said right rail spacer [42] 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 [42] is rigidly attached to said outer side of said right stationary frame rail [32] so that said first end of said right rail spacer [42] aligns with said first end of said right stationary frame rail [32], said second end of right rail spacer [42] aligns with said second end of said right stationary frame rail [32], and said longitudinal axis of said right rail spacer [42] is parallel with said longitudinal axis of said right stationary frame rail [32];
- said right rail vertical slide plate [44] 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 [44] is rigidly attached to said outer side of said right rail spacer [42] so that said first end of said right rail vertical slide plate [44] is flush with said first end of said right rail spacer [42], said second end of said right rail vertical slide plate [44] is flush with said second end of said right rail spacer [42], said lower edge of said right rail vertical slide plate [44] is flush with said lower side of said right rail spacer [42], and said upper edge of said right rail vertical slide plate [44] is flush with said upper side of said right rail spacer [42];
- said right rail horizontal slide plate [46] 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 [46] is rigidly attached to said lower side of said right rail spacer [42] so that said first end of said right rail horizontal slide plate [46] is flush with said first end of said right rail spacer [42], said second end of said right rail horizontal slide plate [46] is flush with said second end of said right rail spacer [42], and said outer edge of said right rail horizontal slide plate [46] is flush with said outer side of said right rail spacer [42];
- wherein a stationary ladder assembly is formed comprising:
- said left stationary frame rail [30];
- said right stationary frame rail [32];
- said plurality of stationary rail cross members [34];
- said left rail spacer [36];
- said left rail vertical slide plate [38];
- said left rail horizontal slide plate [40];
- said right rail spacer [42];
- said right rail vertical slide plate [44];
- and said right rail horizontal slide plate [46];
- said left sliding frame rail [50] 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 [52] 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 [54] 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 [56] 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 [58] 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 [58] is rigidly attached to said upper surface of one of said plurality of sliding rail cross member [54] so that said first end of said left sliding cross member flat bar [58] is flush with said first end of said sliding rail cross member [54], said front surface of said left sliding cross member flat bar [58] is flush with said front surface of said sliding rail cross member [54], and said rear surface of said left sliding cross member flat bar [58] is flush with said rear surface of said sliding rail cross member [54];
- said upper surface of each of said plurality of left sliding cross member flat bar [58] is rigidly attached to said lower surface of one of said plurality of left sliding cross member spacer [56] so that said first end of said left sliding cross member flat bar [58] is flush with said first end of said left sliding cross member spacer [56], said front surface of said left sliding cross member flat bar [58] is flush with said front surface of said left sliding cross member spacer [56], and said rear surface of said left sliding cross member flat bar [58] is flush with said rear surface of said left sliding cross member spacer [56];
- said upper surface of each of said plurality of left sliding cross member spacer [56] is rigidly attached to said lower side of said left sliding frame rail [50] so that said first end of said left sliding cross member spacer [56] is flush with said first end of said sliding rail cross member [54], said front surface of said left sliding cross member flat bar [58] is flush with said front surface of said sliding rail cross member [54], and said rear surface of said left sliding cross member flat bar [58] is flush with said rear surface of said sliding rail cross member [54];
- each of said plurality of left sliding cross member slide plates [60] 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 [60] is rigidly attached to said upper surface of said left sliding member flat bar [58] so that said first end of each of said plurality of left sliding cross member slide plates [60] is flush with said outer side of said left stationary frame rail [30], said second end of each of said plurality of left sliding cross member slide plates [60] is flush with said inner end of said left stationary frame rail [30], said front edge of each of said plurality of left sliding cross member slide plates [60] is flush with said front surface of said left sliding cross member flat bar [58], and said rear edge of each of said plurality of left sliding cross member slide plates [60] is flush with said rear surface of said left sliding cross member flat bar [58];
- each of said plurality of right sliding cross member spacers [62] 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 [64] 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 [64] is rigidly attached to said upper surface of one of said plurality of sliding rail cross member [54] so that said first end of said right sliding cross member flat bar [64] is flush with said second end of said sliding rail cross member [54], said front surface of said right sliding cross member flat bar [64] is flush with said front surface of said sliding rail cross member [54], and said rear surface of said right sliding cross member flat bar [64] is flush with said rear surface of said sliding rail cross member [54];
- said upper surface of each of said plurality of right sliding cross member flat bar [64] is rigidly attached to said lower surface of one of said plurality of right sliding cross member spacer [62] so that said first end of said right sliding cross member flat bar [64] is flush with said first end of said right sliding cross member spacer [62], said front surface of said right sliding cross member flat bar [64] is flush with said front surface of said right sliding cross member spacer [62], and said rear surface of said right sliding cross member flat bar [64] is flush with said rear surface of said right sliding cross member spacer [62];
- said upper surface of each of said plurality of right sliding cross member spacer [62] is rigidly attached to said lower side of said right sliding frame rail [52] so that said first end of said right sliding cross member spacer [62] is flush with said second end of said sliding rail cross member [54], said front surface of said right sliding cross member flat bar [64] is flush with said front surface of said sliding rail cross member [54], and said rear surface of said right sliding cross member flat bar [64] is flush with said rear surface of said sliding rail cross member [54];
- each of said plurality of right sliding cross member slide plates [66] 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 [62] 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 [64] 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 [64] is rigidly attached to said upper surface of one of said plurality of sliding rail cross member [54] so that said first end of said right sliding cross member flat bar [64] is flush with said second end of said sliding rail cross member [54], said front surface of said right sliding cross member flat bar [64] is flush with said front surface of said sliding rail cross member [54], and said rear surface of said right sliding cross member flat bar [64] is flush with said rear surface of said sliding rail cross member [54];
- said upper surface of each of said plurality right sliding cross member flat bar [64] is rigidly attached to said lower surface of one of said plurality of right sliding cross member spacer [62] so that said first end of said right sliding cross member flat bar [64] is flush with said first end of said right sliding cross member spacer [62], said front surface of said right sliding cross member flat bar [64] is flush with said front surface of said right sliding cross member spacer [62], and said rear surface of said right sliding cross member flat bar [64] is flush with said rear surface of said right sliding cross member spacer [62];
- said upper surface of each of said plurality of right sliding cross member spacer [62] is rigidly attached to said lower side of said right sliding frame rail [52] so that said first end of said right sliding cross member spacer [62] is flush with said second end of said sliding rail cross member [54], said front surface of said right sliding cross member flat bar [64] is flush with said front surface of said sliding rail cross member [54], and said rear surface of said right sliding cross member flat bar [64] is flush with said rear surface of said sliding rail cross member [54];
- each of said plurality of right sliding cross member slide plates [66] 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 [66] is rigidly attached to said upper surface of said right sliding member flat bar [64] so that said first end of each of said plurality of right sliding cross member slide plates [66] is flush with said outer side of said right stationary frame rail [32], said second end of each of said plurality of right sliding cross member slide plates [66] is flush with said inner end of said right stationary frame rail [32], said front edge of each of said plurality of right sliding cross member slide plates [66] is flush with said front surface of said right sliding cross member flat bar [64], and said rear edge of each of said plurality of right sliding cross member slide plates [66] is flush with rear surface of said right sliding cross member flat bar [64];
- wherein a sliding ladder assembly is formed comprising:
- said left sliding frame rail [50];
- said right sliding frame rail [52];
- said plurality of sliding rail cross members [54];
- said plurality of left sliding cross member spacers [56];
- said plurality of left sliding cross member flat bars [58];
- said plurality of left sliding cross member slide plates [60];
- said plurality of right sliding cross member spacers [62];
- said plurality of right sliding cross member flat bars [64];
- and said plurality of right sliding cross member slide plates [66];
- wherein said sliding ladder assembly is slidably attached to said stationary ladder assembly;
- said hydraulic motor [80] 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 [80] is rigidly attached to said bulkhead [14], said left stationary frame rail [30], or said right stationary frame rails [32];
- said hydraulic motor sprocket [82] is a profiled wheel with teeth that mesh with said hydraulic motor drive chain [84];
- said hydraulic motor sprocket [82] is rigidly attached to said drive shaft on said hydraulic motor [80];
- said hydraulic motor drive chain [84] is a closed loop of roller chain or a connected flexible series of metal links;
- said front roller chain axle [90] is a central shaft, rod, or spindle;
- said front roller chain axle [90] is pivotally attached to said left stationary frame rail [30] and said right stationary frame rail [32];
- said rear roller chain axle [92] is a central shaft, rod, or spindle;
- said rear roller chain axle [92] is pivotally attached to said left stationary frame rail [30] and said right stationary frame rail [32];
- said front roller chain axle drive sprocket [94] is a profiled wheel with teeth that mesh said hydraulic motor drive chain [84];
- said front roller chain axle drive sprocket [94] is rigidly attached to said front roller chain axle [90];
- said left roller chain [96] is a closed loop of roller chain or a connected flexible series of metal links;
- said right roller chain [98] is a closed loop of roller chain or a connected flexible series of metal links;
- said left front roller chain axle sprocket [100] is a profiled wheel with teeth that mesh said left roller chain [96];
- said left front roller chain axle sprocket [100] is rigidly attached to said front roller chain axle [90];
- said left rear roller chain axle sprocket [102] is a profiled wheel with teeth that mesh with said left roller chain [96];
- said left rear roller chain axle sprocket [102] is rigidly attached to said front roller chain axle [90];
- said right front roller chain axle sprocket [110] is a profiled wheel with teeth that mesh said right roller chain [98];
- said right front roller chain axle sprocket [110] is rigidly attached to said front roller chain axle [90];
- said right rear roller chain axle sprocket [112] is a profiled wheel with teeth that mesh with said right roller chain [98];
- said right rear roller chain axle sprocket [112] is rigidly attached to said front roller chain axle [90];
- said left roller chain connection to front sliding rail cross member [106] is a piece of hardware or bracketry that rigidly attaches said left roller chain [96] to one of said plurality of sliding rail cross members [54];
- and
- said right roller chain connection to front sliding rail cross member [116] is a piece of hardware or bracketry that rigidly attaches said right roller chain [98] to one of said plurality of sliding rail cross members [54].