Abstract:
An apparatus and method for collecting and transporting concrete waste comprises a container, a cart for supporting and moving the container and a lifting component attached to the frame of a cement truck for lifting the cart and container off the ground for transport. The apparatus may be stored on a cement truck so that the apparatus prevents disposal of cement and concrete waste in an unlawful or unsightly manner and allows the cement and concrete waste to be returned to a cement and concrete production facility and recycled. The cart includes a component for tilting the container about its midsection by an elongated lever or handle. The cart also includes a component for limiting the forward tilting of the container and for locking the container in an upright position. A wheel locking mechanism for at least one wheel of the cart is provided. The mechanism is manually engaged or disengaged.

Description:
RELATED APPLICATION 
     This application is a continuation-in-part of non-provisional application Ser. No. 10/398,357, filed Apr. 4, 2003, now U.S. Pat. No. 6,966,687 B1 which is a national stage entry of PCT/US01/31372, filed Oct. 9, 2001, which is a continuation-in-part of application Ser. No. 09/681,000, filed Oct. 6, 2000, now U.S. Pat. No. 6,461,098. 
    
    
     FIELD OF INVENTION 
     This invention relates to an apparatus and method for clean up and disposal of cement and concrete waste. The use of the subject apparatus and method facilitates the clean up of cement and concrete waste at the job site. Cement trucks having a cement mixing drum connected to a chute for delivering mixed concrete from the mixer to a particular location are commonly used throughout the country in the construction of buildings, roads, and other concrete structures. When the job in finished, the cement within the chute, must be cleaned before the truck leaves the job site. Otherwise, the concrete will harden making it difficult or impossible to clean off the chute. It is common practice to wash the waste from the chute onto the ground, into a wheelbarrow, or into a nearby storm drain. However, such disposal usually violates local laws or ordinances governing the disposal of concrete or cement waste. Nevertheless, this is done regularly, either intentionally or unintentionally, because no other facilities are available at a job site to clean up the concrete waste. This invention protects the environment by keeping cement and concrete waste from being disposed of into the storm sewers. 
     BACKGROUND OF THE INVENTION 
     Cummins U.S. Pat. No. 6,033,178 disclosed a device that mounts to the rear tail gate of a pick up truck and allows the user to lift the trash container off the ground for transport. Cummins discloses an articulating support frame which is attached to the back of a pick up truck. The frame engages the trash container and lifts it to a raised position for transport by the vehicle. 
     Mottin U.S. Pat. No. 3,083,849 discloses an apparatus for collecting waste materials including a waste container which is hydraulically lifted and dumped into a truck. 
     Updik, Jr. U.S. Pat. No. 3,762,586 discloses a refuse collection vehicle and a front loading bin which may be hydraulically raised to dump the refuse therein into the main body of the vehicle. 
     SUMMARY OF THE INVENTION 
     The present invention fills an environmental need for an apparatus and method for facilitating and enabling the disposal of concrete and cement waste. The present invention provides an apparatus and method that allows the waste in the concrete delivery chute or otherwise on the job site to be removed easily and transported to the cement production facility or some other remote location where it may be recycled. 
     In one embodiment of this invention, the apparatus includes a container to receive cement and concrete waste. The container is a barrel or other receptacle which may be made of metal, plastic or any other suitable material. The apparatus further includes some facilities for supporting the container, such as a cart which allows the container to be moved easily along the ground. The cart, preferably, has a brake to allow its movement to be slowed or stopped by an operator. The cart includes facilities for securing the container onto the cart. The cart preferably includes a means for tilting the container to facilitate dumping the cement waste from the container, preferably while the container is attached to the lifting assembly. 
     A lifting assembly is mounted to the frame of a cement mixer truck, preferably between the cab of the truck and the mixer, for lifting the cart and the container mounted thereto off the ground for transport of the cement waste to a remote location, typically the concrete production facility where it can be recycled. The lifting assembly comprises a means for lifting the arms of the lifting assembly, which means can include a electric or manual winch, a hydraulic lift or electric motor with gears, which can be operated to lift the heavy cart and container off the ground. 
     The electric winch or electric motor can be powered by the battery of the truck. After the cart is engaged by the lifting assembly, it is secured to the truck so that it can be safely transported. 
     The container may include a removable colander type strainer at the opening of the container for collecting larger particles from the cement waste, such a gravel, rocks, debris and the like. 
     In addition, the container may optionally be covered by a lid during transport. A typical lid will include a clamp ring to securely hold the lid on the container, with a releasable latch on the clamp ring to allow easy securing and/or removal of the lid on the container. Preferably, the lid is configured to be secured on the container when the container also has the colander type strainer mounted on the opening of the container. 
     An optional agitation or vibrating assembly may also be mounted to agitate the waste in the container to prevent the cement from setting during transport. This may be externally mounted to the container or a vibrating element may be extended into the concrete waste in the container to vibrate it from either the top, bottom or sides of the container. 
     The subject method of this invention includes positioning a drum or container under the chute of the cement truck so that material collected from washing the chute can be deposited into the container. Waste located in the chute is washed from the chute and collected in the container. Additional waste may also be removed from the job site by hand and deposited into the container. The container is then moved to a position where it can be lifted onto the frame of the cement truck. The container is then lifted onto the cement truck and is secured to allow safe transport of the container to a remote location. Use of the apparatus and method of this invention avoids depositing cement or concrete waste in locations that may violate laws or ordinances. By storing the container on the cement truck when it is not in use, it insures that a convenient apparatus and method of concrete and cement disposal is always available when the cement truck is present. When the cement truck returns to the cement or concrete production facility, the waste may be recycled and used in future cement or concrete production. 
     Alternatively, it may be safely disposed of at the production facility, if desired. Also contemplated is the container and cart assembly portion as a separate component, useful for the collection and movement of liquid waste materials. 
     (1) An apparatus for the collection and transportation of cement waste can be fabricated from the following components. A container to receive cement waste is provided. Cart means for supporting and moving the container are provided. Means are mounted to the frame of a cement mixer truck between the cab of the truck and the mixer for lifting the cart means and container off the ground for transport of the cement waste. The cart means include cage means rotatably mounted to the cart means for holding the container and allowing the container to tilt relative to the cart means. The cage means includes at least one band encircling the container with a pair of shafts extending from the opposite sides of the band. The cart means includes means for rotatably receiving the shafts of the cage means. The cart means further includes means for rotating the container forward and backward about the axis of the shafts. 
     (2) In a variant of the invention, the means for rotating the container forward and backward about the axis of the shafts further includes at least one extension handle attached to one of the shafts. 
     (3) In another variant, at least one tilt limitation bracket is provided. The tilt bracket is located upon the cart means and is movable from a first position to a second position. The tilt bracket engages the extension handle in the first position and prevents the container from tilting beyond a predetermined angle. The tilt bracket permits free rotation of the container in the second position. 
     (4) In still another variant, a vertical locking bracket is provided. The locking bracket is located upon the cart means and is movable from a first position to a second position. The locking bracket engages the extension handle in the first position and prevents the container from tilting. The locking bracket permits free rotation of the container in the second position. 
     (5) In a final variant, a cart frame is provided. Wheels are attached to the cart frame for transport of the cart means. A locking plate is provided. The locking plate is fixedly attached to at least one of the wheels, has a diameter smaller than the wheel and at least one securing aperture extending orthogonally through the locking plate. A parking mechanism is provided. The parking mechanism is attached to the cart frame and has an extendable pin. The pin is sized and shaped to removably engage the securing aperture. The pin is extendable from a first, retracted position, permitting free movement of the locking plate to a second, extended position. In the second position the pin engages the securing aperture and prevents movement of the locking plate, thereby preventing movement of the cart means. 
     Further aspects of the present invention will become apparent from the following detailed description when considered in conjunction with the accompanying drawings. It should be understood, however, that the detailed description and the specific examples while representing the preferred embodiments are given by way of illustration only. 
    
    
     
       DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a cement truck having apparatus for disposal of cement waste in accordance with the principles of this invention; 
         FIG. 2  is a perspective view of the container, cart, cage assembly and lifting assembly, and a portion of the frame of the cement truck; 
         FIG. 3  is an enlarged perspective view of one embodiment of a lifting assembly that may be used to lift the cart and container for transport in accordance with the principles of this invention; 
         FIG. 4  is a perspective view of a portion of the cage assembly; 
         FIG. 5  is a perspective view of a portion of the lifting assembly; 
         FIGS. 6A ,  6 B and  6 C illustrates the apparatus of this invention in three different positions; 
         FIG. 7  illustrates alternative embodiments of the lifting assembly; 
         FIG. 8A  illustrates details of the attachment means on the cart frame; 
         FIG. 8B  illustrates a detail of the socket lock on the cart frame; 
         FIG. 9  illustrates an alignment of the lifting assembly to the cart for coupling the engaging assembly onto the cart frame; 
         FIG. 10  illustrates a hydraulic ram used for lifting the arms of the lifting assembly; 
         FIG. 11  illustrates the a motor lifting means used for lifting the arms of the lifting assembly; 
         FIG. 12  illustrates a spring latch used to secure the lifting assembly in the fully raised position; 
         FIG. 13  illustrates an embodiment of a sieve and/or lid mounted onto the opening of the container; 
         FIG. 14  illustrates embodiments of the cage assembly; 
         FIGS. 15A and 15B  illustrate alternative brake mechanisms; 
         FIG. 16  illustrates the component parts of a preferred pneumatic vibrator engine; 
         FIG. 17  illustrates the container with cart means with cage means rotatably mounted to the cart means and means for tilting the container forward and backward; 
         FIG. 18  illustrates a tilt limitation bracket attached to the cart means; 
         FIG. 19  illustrates a vertical locking bracket attached to the cart means; 
         FIG. 20  illustrates a parking mechanism attached to the cart means engaging a locking plate attached to a cart wheel; and 
         FIG. 21  illustrates the parking mechanism disengaged from the locking plate. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The following description is of the best presently contemplated modes of carrying out the inventions. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. In accordance with the present invention, there is shown in  FIG. 1  a cement truck generally designated as  10 . The cement truck has a mixer  11 , a cab  12 , and a frame  14 . Mounted behind the cab  12 , and before the mixer  11  is disposal apparatus generally designated as  16 . This apparatus includes a container  17  which is mounted on a cart  18 . While the disposal apparatus  16  is shown as being mounted behind the cab  12 , which is the most convenient place to do so, it may nevertheless be mounted elsewhere on the frame  14  for transport of the concrete waste to a remote location. 
     Referring to  FIG. 2 , the container  17  is shown mounted on the cart  18 . The cart  18  includes a pair of rear wheels  19  and a pair of front wheels or casters  21 . The wheels are either the same or different sizes if desired. The use of the large wheels  19  and the smaller caster  21  allow the cart to be rolled flat or tilted back like a hand truck. The wheels  21  are preferably casters so they allow the cart to be rotated easily if desired for positioning the cart both beneath the chute (not shown) of the cement truck, or positioning it near the lifting assembly identified generally as  36 , which is mounted to the truck frame  14  as described more fully hereinafter. The cart  18  includes a handle  23  and a frame  25 . 
     Cart  18  also includes a parking brake to prevent wheel rotation and movement of the cart. In one embodiment shown in  FIG. 2 , parking brake handle  24  which when pulled moves a pair of plates  26  against each wheel  19  to slow or prevent the wheels from rotating. Alternatively, a cable brake assembly  86  shown in  FIG. 15A  can comprise a brake pad  87  that can compress against wheel  19  and thereby restrict wheel rotation by the force of expansion spring  86  located on cable  89  between brake pad  87  and a lower horizontal strut of cart frame  25 . The cable can be conveniently routed up the cart frame  25  to cart handle  23  onto a hand release lever (not shown) mounted on the cart handle. 
     Pulling the cable compresses spring  86  and releases brake pad  87 . In another embodiment shown in  FIG. 15B , manual brake assembly  90  which comprises brake pad  87  and manual actuating brake handle  91  can be mounted onto a vertical strut of cart frame  25  above wheel  19 , or mounted onto a horizontal strut of cart frame  25  adjacent to wheel  19 , such that the locked position of the manual brake handle compresses brake pad  87  against the wheel and thereby restrict wheel rotation. 
     The container  17  is supported by a cage assembly  28  which is rotatably mounted to the frame  25  of the cart  18 . The frame  25  has a pair of means for pivot  29  mounted thereto for receiving a pair of shafts  35  connected to the cage assembly  28  which is shown in  FIG. 4 . The means for pivot  29  can be a pillow block bearing, bushings, babbitted two piece bearings, and the like pivot means. The cage assembly  28  has a top band  32  to which shafts  35  are welded on opposite sides. The top band  32  may be separable at  33  to allow easy insertion of container  17 . 
     A handle  31  is mounted to one shaft  35  of the cage assembly  28  to allow the container  17  to be tilted to either allow the contents of the container  17  to be dumped or to align the container  17  with the chute so that material can be washed out of the chute into the container relatively easily. The handle  31  can be moved forward or backwards while the cart is on the ground to tilt the container in either direction from dumping. Thus, the cage can be rotated relative to the cart  18  by moving the handle  31  either forward or backward. When the cart  17  is loaded on the truck, the cart can be tilted backwards for dumping without it being disengaged from the truck. 
     In one embodiment, a socket lock  92  can be mounted upon the horizontal strut of cart frame  25 , shown in an overhead view in  FIG. 8B , in which the shaft of handle  31  (in cross section) is seen locked inside the socket lock and retained by push pin  93 . The socket lock operates to hold the cage assembly from rotating in the pivot of pillow blocks  29  by retaining the handle  31  in a fixed position. To tilt the container and cage assembly, the operator removes push pin  93  from the socket lock  92 , thereby freeing handle  31  for free rotation in the axis defined by shafts  35  and pillow blocks  29 . In a preferred embodiment shown in  FIG. 14 , the handle  31  is not a straight rod but rather is shaped to define a series of turns  98  located near the handle terminus (away from the cage assembly and after the socket lock  92 ) to extend the handle  31  terminus away from the cage assembly such that there is a reduced likelihood of pinch when the handle is operated to rotate and empty the container. 
     The handle  31  (dumping arm) can be attached to shaft  35  by a variety of means to facilitate strength or to provide ease in servicing the bearings. Exemplary attachments include bolting, welding or securing by pins to connect handle  31  to shaft  35 . Container  17  can be provided in any of a variety of shapes, including cylinders, rectangles and other shapes, and may encompass any of a variety of size capacities depending on the duty of the container. A preferred embodiment is a drum like container. In addition, it is to be appreciated that the container can be made of any of a variety of materials, including but not limited to metal, such as aluminum, steel, and metal alloys, plastics such as polyethylene, polyurethane and like plastics, including recycled plastic materials, rubber, fiberglass, carbon fiber, composites and the like materials. 
     The cage assembly  28  is similarly made of a variety of materials as identified above for the container, although particularly strong materials are preferred, such as stainless steel. 
     The cart frame  25  can also be made of a variety of materials, as indicated above, and the invention is not to be construed as so limited. Particularly preferred are lightweight and strong materials, such as carbon fiber, plastics and composite materials, and the like. In addition, it is understood that the frame can be manufactured in a variety of means, including by use of rods, tubing, square tubing, rolled flat stock, molded plastic, folded sheet metal, cast metals, and the like manufacturing means. 
     Referring now to both  FIGS. 2 and 3 , the lifting assembly generally designated as  36  is shown mounted to the frame  14  of the truck  10 . The lifting assembly  36  is mounted to truck frame  14  using existing bolt hole patterns such as those shown at  40 . If bolt holes so not exist, holes may be drilled into the frame  14  to allow the lifting assembly  36  to be mounted thereto. 
     Alternatively, the lifting assembly could be welded to the frame or fastened by some by other means well known in the art, such as by use of hangers, clamps, bolts, fasteners, and the like. 
     The lifting assembly  36  includes a pair of vertical angle members  37  interconnected by a U shaped member  38  which extends from one angle member  37  to the other angle member  37 . A pair of cross bar members  41  and  42  are mounted to the angle members  37  for rotary movement relative thereto. The members  41  and  42  are connected to a pair of lifting arms  43  and  44  on each side of the lifting assembly  36 . At the end of each pair of lifting arms  43  and  44  there is an engaging assembly generally designated as  46 . 
     The engaging assembly  46  will be explained more fully hereinafter. The cross bar members can be attached to angle members  37  by any of a variety of means, including bushings, sockets, bearings, and the like. A preferred means comprises the pillow block bearings  79  shown in  FIG. 7 , which bearings are mounted onto angle members  37  at the pivot point and on the end of cross bar members  41  and  42 . A typical bushing at the pivot point is bronze or brass for better wear and fit of the cross bar members. Alternatively, a babbitted or block bearing can be used. 
     The lifting assembly  36  engages the shafts  35  of the cage assembly  28  holding the container  17  to lift the entire container  17 , cage assembly  28  and cart assembly  18  onto the truck  10 . 
     Lifting can be accomplished by a means for moving the lifting arms, which means can be an electric or manual winch which mounted to the truck  10  and is generally designated as  51 . The winch  51  has a drum  52  on which is mounted a cable  53  which has one end connected at  54  to an arm  43  of the lifting assembly  36 . 
     When the winch  51  is actuated, the pair of arms  43  and  44  rotate upwardly to lift the cart and container off the ground. 
     Alternatively, the lifting means can be a hydraulic ram  64  as shown in  FIG. 10  or a motor-driven gear assembly  65  shown in  FIG. 11 , which means is coupled to cross bar members  41  or  42  for rotary movement. 
     Hydraulic ram  64  can be attached at the top by pin  66  seated onto angle member  37  and opposing plate  68 , and attached at the bottom by pin  67  to flanges  68  that are attached to the extension  69  of cross bar member  42  shown in  FIG. 10 . Upon raising or lowering the ram, the cross bar member  42  is rotated which causes the lifting arms  44  to raise and lower. 
     The motor-driven gear assembly  65  can be a motor directly coupled to cross bar member  41 , or motor  70  can be coupled to gear assembly  71  through a motor-gear assembly coupler  72  shown in  FIG. 11 . The motor drive can be electric, steam or combustion engine, and may by 12 volt and receive power from the truck battery. 
     An optional lid  94  can be attached and locked onto the container by use of a clamp ring  95  around the circumference of the lid fitted with a clamp ring securing latch  96  to keep all waste in the container during transport. 
     In addition, the container can be fitted with a colander type sieve  78  that seats onto the opening of container  17  as shown in  FIG. 13 . The sieve may contain a variety of pore sizes adapted to collect particles of preselected size. A preferred sieve collects gravel typically mixed into a cement product. In a preferred embodiment, the optional lid will fit onto the container opening on a container holding a colander sieve. 
     Referring now to  FIGS. 3 and 5 , the engaging assembly  46  includes a vertical support  56  against which the vertical frame of the cart  18  is held during transport. If desired a rubber pad  59  may be bonded to support  56  to protect the cart frame  25 . A pair of U shaped members generally designated as  57  each have a quick release hitch or locking pin  58  which locks each shaft  35  of the cage assembly  28  when the lifting assembly  36  engages the cage assembly. 
     Alternatively, the engaging assembly may adopt another configuration as shown in  FIG. 7  which comprises a pair of lifting slots  60  positioned on vertical support  56  to seat a pair of slot engaging pins  61  on the vertical section of cart frame  25  shown in  FIGS. 8 and 9 . The alignment of lifting slots  60  with slot engaging pins  61  is illustrated in  FIG. 9 . By advancing the cart  18  towards the lifting assembly  36 , the pins  61  enter and seat into slots  60  and slip downward to the bottom of the slots to secure the engagement. A preferred slot engaging pin is a solid steel pin, although the material can be varied based on the application and weight to be supported. A typical configuration uses a four inch diameter solid steel pin. 
     Optional stabilizing push pins can be inserted through one or more lock pin ports  62  located on both the vertical support  56  and on the cart frame  25  as shown in  FIGS. 7 ,  8 A and  9 . Once the engaging pins  61  align and engage slots  60 , the lock pin ports align and can receive push pins, thereby providing added hold down capability and restricting the ability of the cart to move when attached to the lifting assembly. 
     A further stabilizing support  63  is shown attached to vertical support  56  in  FIG. 9 . The stabilizing support is a vertical bar or rod attached to support  56  and has an extended length adapted to position above the top surface of a horizontal support beam of the cart frame  25  when the pins  61  are seated in slots  60 , thereby restricting the vertical lift of the cart and preventing the pins from jumping out of the slots when the lifting assembly, cart and container are jostled during transportation. 
     Referring now to  FIG. 6A  there is shown the container  17  on cart  18  which is resting on the ground prior to being lifted on the truck. The lifting assembly  36  is shown in engagement with the cage assembly  28 .  FIG. 6C  the lifting assembly  36  is shown in the fully raised position in which the cart  18  is transported on the truck.  FIG. 6B  shows the lifting assembly  36  in an intermediate position where the cart  18  is partially lowered to allow waste to be dumped from the container  17  while on the truck. 
     Once positioned in the fully raised position shown in  FIG. 12 , the lifting assembly  36  can utilize a spring latch with catch  73  mounted onto angle member  37 , which latch can engage a pin  74  mounted on lifting arm  43  in order to secure the lifting assembly in the raised position. The latch  73  includes a handle  75 , a pivot  76  at the point of attachment of latch  73  to member  37 , and torsion spring  77  which maintains tension on the latch in the locked position to hold pin  74 . 
     The container  17  may be agitated during transport in a number of different ways. One or more agitator or shaker devices may be mounted to the cage to agitate the cage during transit. 
     The agitator may be electrically operated and powered by a power supply such as battery, preferably a battery on the truck. 
     Exemplary agitator  80  shown in  FIG. 14  can be a vibrating motor, preferably a pneumatic vibrator engine, and can be attached to top band  32  on cage assembly  28 . The pneumatic vibrator engine, having exhaust port  85 , can be quick coupled to an air supply on the truck or portable compressor using a hose  81  coupled to a nipple  82  on the vibrator, a quick coupler  83  and inline manual ball valve  84 . Operation of the agitator will transmit vibrations into the liquid cement waste contained in the container, and thereby prevent cement setting (solidifying). 
     Alternatively, as shown in  FIG. 6A , a rod  97  may be placed into the container either from the bottom, top or the sides of the container, and the rod may be agitated or vibrated during transit to prevent the waste in the container from setting. 
     In one embodiment, the cart frame  25  may be motorized via wheels  19  to facilitate ease of movement of heavier loads. The motor can be any of a variety of engines, including electrical, pneumatic, combustion and the like. The motor can be coupled to wheel  19  for drive by any available means. 
     In another embodiment, the cart frame  25  can be fitted with skis or blades instead of wheels to facilitate use in cold weather where there is snow or ice at the job site. In use at the job site, the lifting assembly  36  is lowered and the cart  18  and container  17  are disengaged from the engaging assembly  46 . The cart  18  is rolled to the end of the truck where the chute can be placed into or above the entrance into the container  17 . The chute is then washed out into the container  17 . Any other waste lying around the job site can be deposited by hand into the container. The cart  18  is then rolled over to the lifting assembly  36  where the engaging assembly  46  is positioned such that the U shaped members  57  engage the shafts  35  of the cage assembly  28 . The locking pins  58  are inserted in place to secure the cage assembly  28  to the lifting assembly  36 . 
     The winch  51  is actuated to pull the arms  43  and  44  up to raise the cart  18  and container  17  off the ground. The winch pulls the entire assembly tight against the truck frame where it remains for transport. Safety chains or lanyards may further secure the apparatus for transport. At the cement production facility, the winch is reversed to lower the cart  18  to the ground or to the position shown in  FIG. 6B  to allow waste to be dumped while the apparatus is on the truck. When the apparatus is lowered to the position shown in  FIG. 6A , the locking pins  58  are released to allow the engaging assembly  46  to disengage from the shafts  35  of the cage assembly. The cart  18  can then be wheeled to wherever the cement and concrete waste is to be disposed of. 
     Thus it is seen that the invention is suited for use in collecting and disposing of cement waste at the site of generating the waste. In this regard, it is understood that the apparatus and methods can be used for a variety of wastes, including pumped concrete waste and/or wash from the concrete storage tank, boom pump waste and/or wash from the boom, and any liquid environmental waste that is to be collected and transported from the site of collection. 
     Insofar as the cart and container can be used independent of the lifting assembly mounted on the truck, as described herein, the invention further contemplates an apparatus comprising cart  18  supporting container  17  by means of cage assembly  28 , which apparatus is free from lifting assembly  36 . 
     (1) An apparatus for the collection and transportation of cement waste  16  can be fabricated from the following components. A container to receive cement waste  17  is provided. Cart means  18  for supporting and moving the container  17  is provided. Means are mounted to the frame  14  of a cement mixer truck  10  between the cab  12  of the truck  10  and the mixer  11  for lifting the cart means  18  and container  17  off the ground for transport of the cement waste (not shown). The cart means  18  include cage means  28  rotatably mounted to the cart means  18  for holding the container  17  and allowing the container  17  to tilt relative to the cart means  18 . The cage means  28  includes at least one band  32  encircling the container  17  with a pair of shafts  35  extending from the opposite sides of the band  32 . The cart means  18  includes means for rotatably receiving the shafts  35  of the cage means  28 . The cart means  18  further includes means  29  for rotating the container  17  forward and backward about the axis  22  of the shafts  35 . 
     (2) In a variant of the invention, the means  29  for rotating the container  17  forward and backward about the axis  22  of the shafts  35  further includes at least one extension handle  31  attached to one of the shafts  35 . 
     (3) In another variant, at least one tilt limitation bracket  100  is provided. The tilt bracket  100  is located upon the cart means  18  and is movable from a first position  104  to a second position  108 . The tilt bracket  100  engages the extension handle  31  in the first position  104  and prevents the container  17  from tilting beyond a predetermined angle  112 . The tilt bracket  100  permits free rotation of the container  17  in the second position  108 . 
     (4) In still another variant, a vertical locking bracket  116  is provided. The locking bracket  116  is located upon the cart means  18  and is movable from a first position  120  to a second position  124 . The locking bracket  116  engages the extension handle  31  in the first position  120  and prevents the container  17  from tilting. The locking bracket  116  permits free rotation of the container  17  in the second position  124 . 
     (5) In a final variant, a cart frame  128  is provided. Wheels  132  are attached to the cart frame  128  for transport of the cart means  18 . A locking plate  136  is provided. The locking plate  136  is fixedly attached to at least one of the wheels  132 , has a diameter  140  smaller than the wheel  132  and at least one securing aperture  144  extending orthogonally through the locking plate  136 . A parking mechanism  148  is provided. The parking mechanism  148  is attached to the cart frame  128  and has an extendable pin  152 . The pin  152  is sized and shaped to removably engage the securing aperture  144 . The pin  152  is extendable from a first, retracted position  156 , permitting free movement of the locking plate  136 , to a second, extended position  160 . In the second position  160  the pin  152  engages the securing aperture  144  and prevents movement of the locking plate  136 , thereby preventing movement of the cart means  18 . 
     Although the present invention has been described in terms of certain preferred embodiments and exemplified with respect thereto, one skilled in the art will readily appreciate the various modification, changes, omissions, and substitutions that may be made without departing from the spirit and scope of the present invention. It is intended that the present invention be limited solely by the scope of the following claims.