Portable cart with angular discharge auger
This is a continuation of co-pending application Ser. No. 07/085,886 filed on Aug. 13, 1987, now abandoned. 
    
    
     TECHNICAL FIELD 
     The present invention relates generally to a portable, self-unloading cart for granular materials and the like, and more particularly to an improved portable cart providing an angular discharge auger recessed into the hopper of the cart and below the sump thereof. 
     BACKGROUND ART 
     Portable carts for discharging granular material and the like are not new as seen from U.S. Pats. to Niewold No. 3,265,253; Meharry No. 3,498,483; Obermeyer et al No. 3,575,306 and Arends No. 4,218,169. 
     Although these patents show efforts to provide grain carts with hoppers having a single auger for self-unloading the hopper, and although these efforts include pivoting or rotating auger tubes of various arrangements capable of assuming many positions relative to the cart frame and hopper, none of the structures shown in these patents, nor others known in the field, provide the full attendant advantages of the instant portable cart. 
     The art known today does not provide a portable, self-unloading cart for granular material and the like which utilizes a recessed auger completely under the floor line to draw from below the hopper floor line, thereby eliminating the need of a discharge shoot; a non-pivoting, non-rotating auger tube angularly related to the cart frame to enable the prime mover operator to see the discharge end of the auger tube without inconvenient and uncomfortable stretching and craning of the head and shoulders, nor a portable cart having those structural features which provides a foldable transport position for the tube so as not to elongate the cart frame length to facilitate normal transport. 
     DISCLOSURE OF THE INVENTION 
     The invention relates to an improved portable cart having in combination a hopper for holding granular material, which hopper includes a sump substantially centrally thereof and at the bottom thereof through which the granular material or the like can flow by gravity; a frame having a front, opposed sides and a rear for supporting the hopper; a pair of wheels supporting the frame; and an auger unit for receiving the granular material from the sump and for discharging the granular material externally of the hopper, the auger unit including an elongated tube and an auger rotatably mounted therein, the tube having a lower end which is connected to and recessed into the hopper and extended below and open to the sump for receiving material therefrom, and an upper end which is extended forwardly and sidewardly away from the hopper so as to be angularly related therewith. 
     It is an object of this invention to provide an improved portable cart for self-unloading granular material and the like. 
     Another object of this invention is to provide an improved portable cart for self-unloading granular material and the like wherein the material discharge tube has a fixed relationship with the hopper and extends forwardly and sidewardly relative to the hopper so as to be easily viewable by the operator of the prime mover of the cart. 
     Another object of this invention is to provide a fixed angular related discharge tube relative to the hopper, the lower end of which is connected to and open to the sump of the hopper, and which lower end extends upwardly from the sump at an approximate 29° , with the auger tube having an upper end extended further upwardly from a connection with the lower end thereof at an approximate additional 17° . 
     Still another object of this invention is to provide a portable cart having a fixed auger discharge tube with a lower end recessed to draw from below the hopper sump line, with the auger extending forwardly and sidewardly relative to the hopper such that the discharge end of the auger tube is disposed forwardly of the front of the hopper and easily viewable by the operator of a prime mover for the portable cart. 
     Yet another object of this invention is to provide a portable cart fulfilling the aforementioned objectives, and wherein the upper end of the auger tube has a pivotal connection such that an upper section thereof can be placed in a rearwardly, horizontally extended position along side the hopper and with the discharge end of the tube inwardly of the hopper rear such as to provide for efficient transportation of the portable cart. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     These and other attributes of the invention will become more clear upon a thorough study of the following description of the best mode for carrying out the invention, particularly when reviewed in conjunction with the drawings, wherein: 
     FIG. 1 is a reduced plan view of the portable cart of this invention shown in connected relationship with a conventional farm tractor, partially shown; 
     FIG. 2 is an enlarged top plan view of the portable cart of FIG. 1, with certain parts thereof shown by the use of dotted lines for clarity of the invention; 
     FIG. 3 is a side elevational view of the cart of FIG. 2; 
     FIG. 4 is a rear elevational view as taken along the line 4--4 in FIG. 3; 
     FIG. 5 is a reduced detailed view of the gate valve arrangement in the sump of the portable cart hopper as viewed along line 5--5 in FIG. 4; 
     FIG. 6 is a slightly enlarged and more detailed view of the gate valve of FIG. 5, showing it in a raised, open condition; 
     FIG. 7 is an enlarged sectional view of the lower portion of the auger tube, and showing the gate valve as taken along the line 7--7 in FIG. 2; 
     FIG. 8 is a view of the hopper bottom discharge opening as taken along the line 8--8 in FIG. 7; 
     FIG. 9 is a detailed view of the connection between auger sections as taken along the line 9--9 in FIG. 4; and 
     FIG. 10 is a view similar to FIG. 9, showing the tube sections in a pivoted, open condition. 
    
    
     BEST MODES FOR CARRYING OUT THE INVENTION 
     Referring now more particularly to the drawings, there is illustrated a portable, self-loading cart (12) for transporting granular material such as grain, or the like. The cart is normally pulled by a prime mover such as a conventional farm tractor (13) having a seat (14) at the rear for the operator, hydraulic lines (16) connected between the tractor (13) and the cart (12) for supplying hydraulic power to the cart (12), a power-take off (17) for supplying drive to the cart power shaft (18), and a hitch bar (19) for pivotal connection with the cart hitch at (21). 
     Generally the portable cart (12) comprises in combination a hopper (22) for holding the material and having a sump (23)(FIG. 7) at its lowest point substantially centrally of the hopper through which, when open, the material can flow by gravity; a frame (24) having a front end (26)(FIGS. 2 and 3), opposed sides (27),(28), and a rear end (29) for supporting the hopper (22); a pair of wheels (31) and an axle member (32)(FIG. 2) for supporting the frame (24), each wheel (31) mounted laterally adjacent a side (27) or (28); and an auger unit (33) for receiving the material from the hopper sump (23) and for discharging the material externally at the hopper (22), for example into another cart, truck or the like for transportation or storage. 
     More particularly, the hopper (22) is supported on the frame (24) by longitudinally spaced, vertical uprights (34), with front and rear supports (36)(See FIG. 4). The hopper (22) itself is rectangular in plan, with interior walls (37),(38),(39) and (41) which converge downwardly from the front, sides and rear (26-29) to the sump (23), and a discharge opening (42)(FIG. 6) formed in one (41)(FIG. 2) of the walls. Obviously, other hopper wall or floor arrangements are feasible, as long as the granular material falls toward the opening (42) and the sump (23). As shown by dotted lines in FIGS. 3 and 4, the walls (37),(38),(39) and (41) may be vertically extended by special end and side pieces, if desirable. 
     Fixed to the hopper discharge opening (42) is a hopper gate assembly (43) which comprises a circularly curved gate (44), gate pivot arms (46) pivoted to the wall (41) at ears (47)(FIG. 7) and secured as by welding to the gate (44), and a lift rod (48) which is part of a hydraulic piston and cylinder unit (49) suspended from a brace (51) extended between the sides (27),(28) and over the hopper sump (23). The lift rod (48) is pivotally connected to the gate (44) at (52) at a lower end thereof such that raising movement of the rod (48) results in the gate (44) being raised above so as to open the discharge opening (42), the gate (44) pivoting over the wall (41) and opening (42) at the pivot ears (47). The hopper wall (41) is also provided with a slightly raised, curved portion (53) such that its lower end (54) will mate with the upper gate end (56), and the bottom converging area of the walls (37-39) is provided with a panel (57) with which the lower end (58) of the gate (44) mates when lowered, this arrangement providing for a tight seal of the gate (44) when closed to prevent discharge of granular material from the hopper (22). 
     As best shown in FIGS. 2, 3 and 4, the frame (24) comprises a pair of elongated side members (59),(61) converging at their front ends (FIG. 1) for the hitch (21), and diverging toward their rear ends such that they are joined by a rear member (62) for supporting the hopper (22) by means of the uprights (34) and supports (36), and supported slightly rearwardly of the sump (23) by the wheels and axle unit (31),(32). 
     To aid in providing for the angular placement of the auger tube, indicated generally at (63) in FIG. 2, one side member (61) is bent outwardly at portion (64) and then inwardly at the portion (66) in a V-shape forwardly of a wheel (31), the tube (63) extended over and above the portions (64),(66). 
     The auger unit (33) includes the elongated auger tube (63) comprised of an upper portion (67) and a lower portion (68), the upper portion (67) extended forwardly and sidewardly (FIGS. 2 and 3) away from the hopper (22) so as to have an angular relationship with the longitudinal and transverse axes of the hopper (22). It will be noted that the lower portion (68) is connected to the hopper wall curved portion (53) so as to be fixed therewith and thus is recessed into the hopper (22). 
     The upper tube portion (67) comprises an upper section (69) pivotally connected by a conventional bell-crank unit (71)(FIGS. 9 and 10) to a lower section (72), and with a discharge spout (73) at the outer end of the upper section (69). Referring to FIGS. 7 and 8, the lower tube portion (68) has a discharge opening (74) formed at its lower end, and is provided with a slide gate (76) for opening and closing the opening (74); an elongated rod (77) having a pinion (78) on its inner end and operated manually by a handle (79)(FIG. 3) near the front of the hopper frame (24) rotatable to slide the gate on guides (81),(82) by means of a rack (83) affixed to the gate (76). 
     Further, to achieve the angular relationship of the tube (63) with the hopper (22), the lower portion (68) extends upwardly from the sump (23) at approximately 29° (FIG. 7) and the upper portion (69) extends upwardly from the lower portion another approximate 17° . This provides for the fixed, single auger (63) drawing from the hopper (22) below the sump (23) and having its discharge spout (73) to one side of the hopper (22) and forwardly of the hopper front end (26) such that the tractor operator on the seat (14) can easily turn his/her head with sufficient ease to see the discharge spout (73) when discharging. 
     Delivery of the material is effected by an auger (84) rotatably mounted in the tube (63); a universal joint (86)(FIG. 7) being provided at the junction of the upper and lower tube portions (67),(68), and the lower end inserted through a bearing (87) on the panel (57) for driving engagement via a sprocket and chain unit (88), and a double universal joint (89)(FIG. 2) with the power shaft (17). 
     Referring to FIGS. 9 and 10, the pivotal connection at (90) of the upper tube section (69) and the lower tube section (72) is best illustrated, the upper section having a collar (91) which mates with a lower section collar (92), the respective male and female auger ends (93),(94) also provided for transmitting drive for the auger (84). The conventional bell-crank unit (71), operated by a hydraulic piston and cylinder (96) locks the upper tube section (69) in longitudinal alignment with the lower tube section (72), and is operable to unfold the upper section (69) to a position best shown by dotted lines in FIG. 3 where the upper section extends horizontally alongside the hopper (22) and frame (24). A support (97) is provided for retaining the tube section (72) in its transport position. It will be noted the discharge spout (73) is disposed forwardly of the hopper rear end (29), thereby obviating the need for special transport arrangements for highway travel.