Abstract:
A collapsible and portable cart for universal use in a wide variety of residential and commercial environments, transporting different and various items, while shopping, gardening, laundry, transporting boxes or luggage, etc. The cart has base portion with wheels, which enable to move over the ground and a first foldable basket for heavy loads; and the rapper portion, that has a second foldable basket. Base portion is pivotally connected to the upper portion by link arms and secured by locking mechanisms. Both baskets have locking mechanism to keep the foldable screens in an upright position. The portable universal cart includes a receptacle with compartments, having different devices, to make the use of the cart more pleasing, safe and with more comfort for the user. The portable universal cart has different configurations according the user&#39;s need.

Description:
This application is the Non-Provisional Application for the Portable Universal Cart with patent Application No. 60/373,931, filed on Apr. 20, 2002 as Provisional Application. Applicant: Eduardo F. D&#39;Angelo, U.S citizen, from Miami, Fla., USA. 

   BACKGROUNG OF THE INVENTION 
   This invention relates to the field of carts, and more particularly to a portable and collapsible cart for universal use. 
   This invention refers to a versatile, yet readily collapsible and portable cart, able to meet a wide range of needs, more particularly targeted to the individual/home user and to the tasks which are normally associated with, like shopping, gardening, transporting boxes, luggage, etc. 
   Although various collapsible carts have been previously manufactured to enable them to be conveniently carried and to occupy a small storage space, it has been found that they are really far from the shape, structure and appearance of conventional shopping carts used in supermarkets and malls. Users would like to go shopping with a cart that has a professional look and appearance, to be foldable and able to put in the trunk of the vehicle, not a box with wheels, as many early models exist on the market. 
   There are many shopping areas where no exist shopping carts or if they have, belong to one specific store only. These cause problems to the user to go shopping. Even if the users go to a shopping place and use the shopping carts existing in a particular store and put the items inside the trunk of the vehicle, they will have the problem to carry the items from the vehicle to the house, mainly if you need to park far to the house, when you live in a high rise building, a condominium or a complex apartment. 
   Further, existing carts does not have compartments to store personal valuables items and a place to put a CD player, snack or the like, while the person uses the cart. 
   Existing carts does not have a device to hold and umbrella if you need to use the cart while it is raining or too hot under the sun. Existing carts does not have an adjustable holder to hold a glass, can or bottle, neither a rear view mirror for safety while using the cart. 
   What has been needed is a multipurpose foldable cart that includes safe and convenient collapsibility for compact storage, and possible to be reconfigured for use with a wide variety of uses, not to be used only as a shopping cart for grocery stores, but which can also be configured without inconvenience to be compatible for use in other home, consumer, retail and commercial operations without the need to purchase an additional cart. 
   The best solution is the user to have their own cart, to go to the store for shopping and using the same cart for laundry, gardening, transporting boxes and luggage from any place to the vehicle and transporting later the items from the vehicle to home and vice versa. In general, to have only one cart for different purposes. 
   It is, therefore, an object of the present invention, to provide a portable universal cart which does not have the aforementioned disadvantages and which in addition also has other advantages unavailable in previous proposed carts. 
   BRIEF SUMMARY OF THE INVENTION 
   Accordingly, this invention relates to a foldable and collapsible cart comprising a base portion including wheels to roll the cart over the ground with brakes to stop the vehicle over the ground and a foldable basket, an upper portion with a second foldable basket, with linking arms pivotally connected to base and upper portion, allowing to collapse the cart, and two locking mechanisms associated with the linking arms to secure the upper portion in an upright position. 
   Further, the portable universal cart, have baskets that can be foldable independently, according the user&#39;s need. 
   Each basket has locking mechanisms to keep their foldable screens in an upright position. 
   In general, the portable universal cart has base and upper portion collapsible, including the baskets, allowing being the whole unit portable and handy. 
   Accordingly, the portable universal cart has a pedal in the base portion to easily go to a different surface elevation, like a step, stair or sidewalk. 
   It is an object of the present invention to have a portable universal cart able to use in different climate condition as rain or sun, having a device to hold an umbrella. 
   It is an object of the present invention to make the user enjoys the time while they are shopping or transporting items, to listen music, drink a beverage because exist different receptacle to hold these items. 
   Additionally, the present invention provides a compartment to hold a rear view mirror and a compartment with a key lock to hold values safely. 
   The present invention for the portable universal cart has reflecting pads to make more safety if you are using the cart in a dark environment or at night. 
   It is an object of the present invention to create a cart able to use in different configurations depending of the items or purposes. 
   It is an object of this invention creates a collapsible and portable cart with the appearance of the conventional no collapsible shopping carts used in the supermarkets, malls and stores in general, with addition of numerous advantages and to have a universal cart in the vehicle to solve any problem referring to carry and transport items, without the necessity to purchase an additional cart. 
   Still another object of the invention is to provide an improved portable and collapsible cart for any purpose, mainly for home and commercial use. 
   Finally, another object of this invention is to provide an improved collapsible and portable cart, which is aesthetically new and pleasing with a nice and attractive appearance. 

   
     BRIEF DESCRIPTION OF THE DRAWING 
     For a fuller understanding of the invention, reference is made to the following description, taken in connection with the accompanying drawings, in which: 
       FIG. 1  is a perspective view of the preferred embodiment of the portable universal cart of the present invention; 
       FIG. 2  is a side elevation view of the portable universal cart shown in  FIG. 1 ; 
       FIG. 3  is a rear elevation view of the portable universal cart shown in  FIG. 1 ; 
       FIG. 4A  is a perspective view of the locking mechanism for lower link arms in foldable position; 
       FIG. 4B  is a perspective view of the locking mechanism for lower link arms in the process to get the upright position; 
       FIG. 4C  is a perspective view of the locking mechanism for lower link arms in the upright and unfold position; 
       FIG. 5  is the perspective view of the locking mechanism for upper link arms to keep the upper portion in upright position; 
       FIG. 6  is a perspective view of the foldable lateral screen and bottom screen attached by two bended rods working as a hinge; 
       FIG. 7  is a perspective view of the locking mechanism for the front and rear foldable screens for the base basket and front foldable screen of the upper basket; 
       FIG. 8  is a top plan view of the locking mechanism for the front and rear foldable screen of the base basket and front foldable screen of the upper basket; 
       FIG. 9  is a side elevation view of the optional locking mechanism to hold the main basket is a heavy load is carried; 
       FIG. 10  is a top plan view of the locking mechanism for the foldable lateral screen of the upper basket; 
       FIG. 11  is a side sectional view of the locking mechanism for the foldable lateral screen of the upper basket; 
       FIG. 12  is a perspective view of the receptacle with compartments existing in the upper portion; 
       FIG. 13  is a rear elevation view of the receptacle with all compartments closed, existing in the upper portion; 
       FIG. 14  is a rear elevation view of the receptacle with all compartments open, existing in the upper portion; 
       FIG. 15  is a side elevation view for the portable universal cart having both baskets in a foldable position; 
       FIG. 16  is a side elevation view for the portable universal cart with the upper basket in an unfold position; 
       FIG. 17  is a side elevation view for the portable universal cart with the base basket in an unfold position; 
       FIG. 18  is a side elevation view of the portable universal cart inside the case, in a foldable position; 
       FIG. 19  is a perspective view of the case, with the portable universal cart inside, ready to carry in a portable position by a hand. 
   

   DETAILED DESCRIPTION OF THE INVENTION 
   The portable universal cart of this invention is illustrated in  FIG. 1 , and designated generally by reference numeral  10 . Portable universal cart  10  of this invention can be broken down into the following components, namely, base portion  12  and upper portion  14 . Each of these components will be discussed in detail below. 
   The Base Portion 
   The base portion  12  is a platform with wheels to supports the portable universal cart  10  above the ground surface. The base portion  12  comprises a foldable base basket  110 . Base portion  12  has a shape and configuration to support upper portion  14  of portable universal cart  10  as well as contain the parts and mechanisms required to use the portable universal  10  cart over the ground surface, the locking mechanisms, the braking mechanism, as well as the arms to which the pivotal link between the base portion  12  and the upper portion  14  can be secured, all as will hereinafter be described. 
   In the preferred embodiment, the base portion  12  comprises a framework  24 . Framework  24  is preferably constructed from metal or hard plastic, which presents an attractive outward appearance. 
   In the preferred embodiment of this invention framework  24  is generally rectangular in configuration, as best illustrated in FIG.  1 . The base portion has two rear wheels  28 ,  30  and two front wheels  32 ,  34 . The two rear wheels  28 ,  30  and the two front wheels  32 ,  34  are secured to framework  24  roughly positioned at the corners presented by the rectangular configuration of the framework. This provides the portable universal cart  10  with a stable base having all four wheels touching the ground surface at any one time during normal operation, as illustrated in  FIGS. 1 ,  2  and  3 . The wheels  28 ,  30 ,  32  and  34  can be retractile. 
   The wheels used in the preferred embodiment of this invention are generally wide and comprised of a rubber or other materials with a wide tread to the ground surface to provide traction allowing the portable universal cart  10  to traverse a variety of differing surfaces. 
   The wheels  28 ,  30 ,  32  and  34  of the portable universal cart  10  are linked to framework  24  through the plates  36 ,  37 ,  38  and  39  firmly secured to framework  24 . The rears wheels  28 ,  30  are rigid and securely fixed to the rear plate  38 ,  39  respectively. Further, the rear wheels  28 ,  30  have fastened the brakes mechanism  40 ,  41 , pivotally secured to the wheels  28 ,  30 , as illustrated in FIG.  3 . Brakes mechanism  40 ,  41  includes pedals  42 ,  43  for placing one&#39;s foot and depressing the pedal down to lock the wheels  28 ,  30  independently or to apply the brake mechanism to both wheels. To release, it just needs to move the pedal up. Pedals  42 ,  43  will be part of a side cam brake, friction ring brake or other brake system. 
   The front wheels  32 ,  34  are swivel, to allow a free movement in all directions and are secured to framework  24  through plate  37 ,  36  respectively. 
   A pedal  44  is also provided, as illustrated in  FIG. 3 , which is connected to the rear of framework  24  and is used to incline the portable universal cart  10  when it is necessary to go to a different surface elevation, for example a sidewalk, step or stair. In this case the user pushes the pedal  44  with one&#39;s foot, to incline the portable universal cart  10  with the front extending upwardly to a maximum of 75 grades. It can also be appreciated that by constructing the pedal  44  of a strong durable material, such as aluminum, then the pedal  44  will prevent the portable universal cart  10  from being tilted greater than 75 grades, eliminating any chance the portable universal cart  10  will flip over backwards. 
   The base portion  12  of the portable universal cart  10  has lower link arms  50 ,  52 . Lower link arms  50 ,  52  support the upper portion  14  of the portable universal cart  10 . Lower link arms  50 ,  52  are in U shape form by link rod  54 , as illustrated in FIG.  1 . The upper portion has the upper link arms  56 ,  58  pivotally secured to lower link arms  50 ,  52  by pivots  60 ,  62 . 
   The upper link arms  56 ,  58  fold clockwise and the lower link arms  50 ,  52  fold counterclockwise collapsing the upper portion  14  towards base portion  12 , as illustrated in  FIG. 15 , so the portable universal cart  10  can be stored, for example, or carried in a collapsed position, as best illustrated in  FIGS. 18 and 19 . To effect the collapsing, the lower link arms,  50  and  52  are pivotally secured to the framework  24  by pivots  46 ,  48 , respectively, as best illustrated in  FIGS. 2 and 3 . 
   There are locking mechanisms for lower link arms  70 ,  72  for each arm respectively, to keep in upright position the lower link arms  50 ,  52 , as illustrated in  FIGS. 1 ,  4 A,  4 B, and  4 C. 
   Locking mechanism for lower link arm  70  comprises part  74 . Part  74  is secured to plate  76  through spring hinge  78 . Plate  76  is secured to framework  24 . Part  74  has special shape, a protuberance with a curve surface  84 , to allow moving outside the part  74  when the lower link arm  50  is moving up, as best illustrated in FIG.  4 B. 
   Part  74  has a flat side  80  to allow the lower link arm  50  to be parallel to framework  24 , when the universal portable cart  10  is in a foldable configuration. Part  74  has a flange  86 , as illustrated in  FIGS. 4A ,  4 B and  4 C. 
     FIG. 4A  shows the position of lower link arm  50  when the portable universal cart  10  is in a collapsed position. When the portable universal cart  10  goes from the collapsed position to the upright position, the lower link arm  50  is moving up and start to slide through the protuberance with a curve surface  84 , pushing the part  74  outside, as best illustrated in FIG.  4 B. This movement continuous until lower link arm  50  reaches the end of the protuberance with a curve surface  84  and get the upright position as illustrated in FIG.  4 C. Then, the part  74  goes back suddenly to the original position helped by the spring hinge  78 , locking the lower link arm  50 , and avoiding falling down. Further, lower link arms  50 ,  52  and the rest of the upper portion  14  will not flip over backwards; because arms  50 ,  52  will stop when reach the plate  76 , as illustrated in FIG.  2 . 
   When collapsed position is desired, flange  86  is used to push out part  74 , allowing arm  50  to fold down. 
   This description made for the locking mechanism for lower link arm  70 , applies to the identical locking mechanism  72 , for the lower link arm  52 , as best illustrated in FIG.  1 . Locking mechanisms for lower link arms  70 ,  72  of this invention for the portable universal cart  10  can be extended to any foldable cart used with different purposes, as a locking mechanism to keep a cart in upright position. 
   Once the lower link arms  50 ,  52  and rod  54  are secured in the upright position by the locking mechanisms for lower link arms  70 ,  72 , it will be possible to unfold the upper portion  14 . The upper portion  14  is linked to the base portion  12  by upper link arms  56 ,  58 . 
   Upper link arms  56 ,  58  are pivotally secured to lower link arms  50 ,  52  by pivots  60 ,  62  as best illustrated in  FIGS. 2 and 3 . To hold the upper portion  14  in an upright position as illustrated in  FIG. 15 , there is a locking mechanism for upper link arms  90  associated to upper link arms  56 ,  58 , as illustrated in  FIGS. 1 and 5 . Locking mechanism for upper link arms  90  comprise a rod  92  in U shape, rigid secured to upper link arms  56 ,  58 ; a spring grip  96 , which slide around rod  92  through tubular shape parts  97 ,  98 . Spring grip  96  has tube  99  with a grip  100  firmly secured to rod  92  and a spring  101 . Spring  101  is connected between the movil part of spring grip  96  and the grip  100 , allowing the spring grip  96  to grasp rod  54  with pressure. 
   When upper portion  14  is moving up to unfold the portable universal cart  10 , the locking mechanism for upper link arms  90  with upper link arms  56 ,  58  are moving counter-clockwise until reaches the rod  54  belong to the base portion  12 . The first contact with rod  54  is the spring grip  96 . Spring grip  96  has a curve shape  102  at the end, allowing the spring grip  96  to slide smoothly through the rod  54  until it grasps the rod  54 . Spring  101  will keep the upper portion  14  secured. Spring grip  96  has a lever  104 . When collapsed position is desired, pushing up the lever  104  with one&#39;s hand, release the upper portion  14  from the base portion  12 . 
   Locking mechanism for upper link arms  90  of this invention for the portable universal cart  10 , applies to any foldable cart used with different purposes as a locking mechanism to keep a cart in an upright position. 
   The upper portion  14  will hereinafter be described. 
   The base portion  12  has a base basket  110 , used for shopping or moving items, as illustrated in  FIGS. 1 and 2 . Base basket  110  comprises two lateral foldable screens  112  and  114 , a rear foldable screen  116  and a front foldable screen  118 . Base basket  110  has a bottom screen  120 , as illustrated in FIG.  1 . The bottom screen  120  is secured to the framework  24 . All these screens can be strong to support heavy loads. 
   Foldable screens  112 ,  114 ,  116  and  118  can fold down by hinges  122 ,  124 ,  126  and  128 , attached between the foldable screen and the bottom screen  120 . 
   Hinges  122 ,  124 ,  126  and  128  can be spring hinges to allow going up easily or just two prolonged rods  130 ,  132  of foldable screens  112 ,  114 ,  116  and  118  bended in one of the rod of the bottom screen  120 , as best illustrated in FIG.  6 . 
   Rear and front foldable screens  116 ,  118  fold down first, and laterals foldable screens  112 ,  114  after. It means, when the portable universal cart  10  is in the collapsed position, to build the base basket  110 , first it will unfold foldable screens  112 ,  114  and after unfold foldable screens  116 ,  118 . 
   Foldable lateral screen  112  has the locking mechanisms  150 ,  152  at each end of the screen and foldable lateral screen  114  has the locking mechanisms  154 ,  156  at each end of the screen, too, as best illustrated in  FIGS. 1 ,  2 ,  3 ,  7  and  8 . 
   Locking mechanism  150  comprises a bended plate  158  in U shape, secured to lateral foldable screen  112 , a magnet  160  secured to plate  158 , that hold in an upright position the front foldable screen  118 , through the iron plate  162  firmly secured to rod  161 , belong to the front foldable screen  118 . Further, iron plate  162 , as soon is secured with magnet  160 , locks the lateral foldable screen  112 , too. The U shape of plate  158 , grasp iron plate  162 , not allowing moving the lateral foldable screen  112 . 
   Locking mechanism  150  has a pad  164  to avoid impacts when the portable universal cart  10  is in movement. Inside the pad  164 , there is a reflecting surface  166 , useful when the portable universal cart is used at night to avoid an accident, as illustrated in FIG.  7 . 
   All this description made for the locking mechanism  150 , applies to identical locking mechanisms  152 ,  154  and  156 . 
   Finally, base portion  12  has a bar  170 . One end of the bar  170  is secured to the bottom foldable screen  120  with a hinge  172 , as illustrated in FIG.  2 . This bar  170  is an option, and only used to support the upper basket  200 , when it carries heavy load. The bar  170  has at the other end a locking mechanism  174 , as best illustrated in FIG.  9 . Locking mechanism  174  consist of a spring bolt  176  with a lever  180 . The upper basket  200  has the rod  178 , as illustrated in  FIGS. 1 ,  2  and  9 . The bar  170 , when used, is moving from horizontal to vertical position until it reach the rod  178 . The rod  178  is pushing the spring bolt  176 , allowing to move down until rod  178  is secured to the bar  170 . Lever  180  is attached to spring bolt  176 , allowing the user to move the spring bolt  176  down, and the rod  178  is released. 
   The base portion  12  has certain features that not only provides a useful function, but also serve to finish the appearance of the final portable universal cart  10 . In particular, base portion includes in front thereof a pad  190 , as illustrated in  FIGS. 1 and 2 . Additional ones can be provided around the base where impacts are likely to be encountered. 
   The Upper Portion 
   The upper portion  14  of portable universal cart  10  comprises the upper basket  200  used for shopping or moving items. Further, in the preferred embodiment, upper portion  14  comprises a storage section, a receptacle with different compartments and devices to hold specific items, all as will hereinafter be described. 
   As previously mentioned, the upper link arms  56 ,  58  connect upper portion  14  to the lower link arms  50 ,  52  belong to the base portion  12 .  FIGS. 1 and 2  illustrate how the link arms are pivotally connected. 
   Upper link arms  56 ,  58  are bended at the end of the arm attached to lower link arms  50 ,  52 . 
   Once the locking mechanism for upper link arms  90  grasps the rod  54 , the portable universal cart  10  is in condition to open the upper basket  200 . 
   The upper basket  200  comprises rear foldable screen  210 , bottom foldable screen  212 , lateral foldable screens  214 ,  216  and front foldable screen  218 , as best illustrated in FIG.  1 . When all foldable screens of upper basket  200  are collapsed, as illustrated in  FIG. 17 , the rear foldable screen  210  is the most internal, then lateral screens  214 ,  216 . After the front foldable screen  218  and finally the bottom foldable screen  212 . 
   Rear foldable screen  210  is pivotally connected to upper link arms  56 ,  58  by pivots  226 ,  228 , as illustrated in FIG.  3 . Bottom foldable screen  212  is pivotally connected to upper link arms  56 ,  58  by pivots  230 ,  232 , as best illustrated in FIG.  3 . Laterals foldable screens  214 ,  216  and front foldable screen  218  are connected to the bottom foldable screen by hinges  234 ,  236 ,  238  respectively. Hinges  234 ,  236 ,  238  can be spring hinges to allow going up easily or just two prolonged rods of each lateral and front screen to be bended in one of the rods of bottom foldable screen  212 , using the same principle shown in  FIG. 6  when base basket  110  was described. 
   To fold the upper basket  200  illustrated in  FIG. 2 , first the front foldable screen  218  is folding down until bottom foldable screen  212  is reached. Then rear foldable screen  210  is moving clockwise to allow the lateral foldable screens  214 ,  216  to fold down over the front foldable screen  218  and bottom foldable screen  212 . After, rear foldable screen is moving back to reach his original position. Now, all foldable screens, except rear foldable screen  210  are moving clockwise as a screen package  239  through the pivots  230 ,  232 , to reach the rear foldable screen  210 , as best illustrated in FIG.  15 . 
   To unfold the upper basket  200 , first, the screen package  239  is moving counterclockwise until the bottom foldable screen  212  reach the horizontal position stopped by plates  240 ,  242  secured to upper link arms  56 ,  58 , as illustrated in  FIGS. 1 and 3 . Then rear foldable screen  210  is moving clockwise to allow lateral foldable screens  214 ,  216  to unfold. 
   There are locking mechanisms  250 ,  252  to hold lateral foldable screens  214 ,  216  in vertical position, as illustrated in  FIGS. 1 ,  10  and  11 . There is a rod  266  belong to the lateral foldable screen  214 . 
   Locking mechanism  250  comprises a clamp  254  and a spring bolt  258 . Clamp  254  has a U shape form to receive and hold a rod  266  from the lateral foldable screen  214 . 
   Clamp  254  is firmly secured to upper link arm  56  through a screw  262  or sold. Clamp  254  is rigid, except the spring bolt  258 , to hold and grasp the rod  266 , avoiding collapse the upper basket  200 , keeping the upper basket  200  in horizontal position, as well plates  240 ,  242  keep the bottom foldable screen  212  in horizontal position, too. 
   Locking mechanism  250  has a pad  270  to avoid impact when the portable universal cart  10  is in movement and to protect the reflecting surface  274  when the portable universal cart  10  is used at night, as illustrated in  FIGS. 1 and 10 . 
   This description applies to identical locking mechanism  252  for the lateral foldable screen  216 . The locking mechanisms  250 ,  252  are illustrated in  FIGS. 1 ,  10  and  11 . There is a plate  280  secured to arms  56 ,  58  to hold rear foldable screen  210 , as illustrated in FIG.  3 . 
   As soon lateral foldable screens  214 ,  216  are holding up by the locking mechanisms  250 ,  252 , the rear foldable screen  210  is moving counter-clockwise until plate  280  stop this movement and keeps the rear foldable screen  210  in the right position, as illustrated in  FIGS. 1 and 3 . 
   Finally, the front foldable screen  218  is unfolded and locked by the locking mechanisms  290 ,  292  to avoid folding down or moving out foldable screens  218 ,  214  and  216 , as illustrated in  FIGS. 1 and 2 . Locking mechanisms  290 ,  292  was already described in the base portion  12  as locking mechanisms  150 ,  152 ,  154  and  156 . 
   Front foldable screen  218  has a plate  294  to identify the registered trademark for this invention. The upper basket  200  can be constructed of lighter screens than base basket  110  since heavy items will be generally carried by base basket  110 . 
   In the preferred embodiment, upper portion  14  includes the upper link arms  56 ,  58  that extend upwardly towards the user to joint both arms by rod  300 , as illustrated in  FIGS. 1 and 12 . Another rod  302  is firmly secured to upper link arms  56 ,  58 , as best illustrated in FIG.  1 . 
   Rod  302  has a clip  303  to hold the screen package  239 , as illustrated in  FIGS. 1 and 15 . Rod  300  comprises two pieces of rubber pads  304 ,  306 . Rubber pads  304 ,  306  are spaced apart appropriately so that the user feels comfortable pushing the portable universal cart  10  and fatigue is minimized. 
   The upper portion  14  comprises a flexible storage section  308 , assigned to handbags, CD player, snacks or the like can be stored, as illustrated in  FIGS. 1 ,  2  and  3 . 
   Further, upper portion  14  comprises a receptacle  310 , as illustrated in FIG.  12 .  FIGS. 13 and 14  illustrate the inside of compartments belongs to receptacle  310 . Receptacle  310  is a rectangular box, fastened to upper link arms  56 ,  58  and rod  302 . Receptacle  310  includes four compartments  312 ,  314 ,  316  and  317 , as best illustrated in  FIGS. 1 and 12 . Each compartment has a lid  318 ,  320 ,  322  and  323  respectively to keep closed the compartments. 
   Compartment  312  is the first compartment. It has a device  325 . Device  325  comprises an adjustable holder  324 , as illustrated in  FIGS. 13 and 14 , with the purpose to hold an umbrella (not illustrated). The umbrella has a handle  326  and the stick  328  as illustrated in FIG.  14 . Adjustable holder  324  has a movable part  330  to adjust the handle of the umbrella  326  and a lock  332  to keep this position. Compartment  312  has a lid  318 . Compartment  312  has a hinge  313  secured to lid  318  allowing opening the compartment  312 . Device  325  has a plate  334  secured to lid  318 . Plate  334  has secured a grip clip  336  at the other end. Lid  318  has a lever  338  to allow opening the compartment  312 . When the lid  318  is open in an upright position, using the lever  338 , the grip clip  336  hold the stick  328  belong to the umbrella, avoiding falling down, so the umbrella, when used, extends upwardly and above the upper basket  200  and the user, keeping the user and items inside the basket dry, as best illustrated in FIG.  14 . 
   Compartment  314  is the second compartment. It has an adjustable holder  340  to retain a glass, a can or a bottle  341  as illustrated in  FIGS. 13 and 14 . Adjustable holder  340  has a movable part  342  to adjust the side of the container to hold. Adjustable holder  340  has a lock  344  to keep the desired position. Compartment  314  has a lid  320 . Compartment  314  has a hinge  346  secured to the lid  320 . Lid  320  has a lever  348  to allow opening this compartment when it is used. 
   The third compartment is the compartment  316 . It holds a rear view mirror  350 , as illustrated in  FIGS. 13 and 14 . Rear view mirror  350  has an arm  354  secured to the internal side of lid  322 . Compartment  316  has a hinge  356  secured to lid  322  with a lever  358  attached to lid  322 , allowing opening the compartment  316 . When is open totally, the mirror  350  is out of the compartment  316  and stop as soon the lid  322  reaches the upper link arm  58 , as illustrated in FIG.  14 . Rear view mirror  350  has a rubber frame  360  for protection. 
   The fourth compartment  317  is a small compartment to hold values (wallet, credit cards or cash), as illustrated in FIG.  1 . Compartment  317  has a lid  323 . Compartment  317  has a hinge  357  secured to lid  323 . Lid  323  has a key lock  362  for security. Lid  323  has a lever  359  to open the compartment  317 , as illustrated in  FIGS. 1 and 12 . 
   Finally,  FIGS. 15 ,  16  and  17  show different configurations beside the main configuration illustrated in FIG.  1 . It means portable universal cart  10  can be used as displayed on  FIG. 1  when user needs to use both baskets. To carry few items the portable universal cart  10  configuration illustrated in  FIG. 16  can be selected. In both configurations as illustrated in  FIGS. 1 and 16 , the rear foldable screen  210  is pivotally on the top, allowing putting a long item in the upper basket  200 , if it is necessary. The configuration illustrated in  FIG. 17  is convenient when the user carried an ornamental plant or tree for example; or if it is necessary to carry a luggage or boxes, the configuration illustrated in  FIG. 15  will be the best. All these configurations show a really portable universal cart device. 
   The portable universal cart  10  can be fold and unfold in seconds. 
     FIG. 18  illustrated the portable universal cart  10  in the collapsed position. Upper link arm  56  has clips  366 ,  368  to hold the portable universal cart  10  in a foldable position. Clips  366 ,  368  grasp the mainframe  24 . Upper link arm  58  has clips  370 ,  372  to grasp mainframe  24  for the same function, as illustrated in FIG.  3 . In this position the portable universal cart  10  can be wrapped in a suitable cover  364  for storage or transportation as the case might be, particularly to put inside the trunk of the vehicle as best illustrated in FIG.  19 . Suitable cover  364  has an opening  374  allowing rod  54  to be used as a handle. Suitable cover  364  has a thick zipper  376  to close the cover. Suitable cover  364  can be made of strong synthetic fabric in attractive colors and has a label  378  with the registered trademark. Portable universal cart  10  can be constructed of metal (lightweight aluminum with chrome plate finish, or anodized aluminum in different colors), colored plastic, a mix of these materials or other materials. 
   It is further noted that other modifications and variations may be made to the present invention, without departing from the spirit and scope of the invention as hereinafter claimed.