Abstract:
A convertible cart for restaurants for carrying stacked chairs when a convertible section of the cart is in a first position. The cart is adapted for carrying a trough of dishes, food, and other dining items, food when the convertible section is in a second position. The cart features a convertible preferably tubular U-shaped section spaced up from the base that pivots from the vertical to the horizontal. The U-shaped section carries a pivotable support arm engageable to either the cart handle when the U-shaped section is in the first vertical position, or engageable to the cart base when the convertible section is in the second horizontal position. A trough or flat board can rest on or be engaged with the U-shaped section when in the horizontal position for carrying utensils, food, waste, condiments or the like, as utilized by a restaurant or bar.

Description:
FIELD OF THE INVENTION 
   This invention pertains to a cart most suited for restaurants that can be used as a chair carrier, and converted to carry a specially designed tray for the movement of dishes, pots or even meals as may be desired. 
   BACKGROUND OF THE INVENTION 
   Convertible cart is a very broad term that applies to a multiplicity of apparatuses all of which can be used for two or more tasks or for the transportation of two or more different items. 
   Apparatuses for carrying a multiplicity of chairs for return to or delivery from a storage facility or other location to a restaurant or banquet hall, or convention centre is known in the art. Typical of such patents is U.S. Pat. No. 1,912,864, of Stannard, whose apparatus was designed to carry a plurality of folding chairs as might be used in an auditorium of a school or the Elks Club, etc. 
   Another convertible cart is disclosed and claimed in the Dahl patent, U.S. Pat. No. 5,476,282. This patent however serves a different industry. It is intended for the movement of large musical instruments, PA equipment, electronic keyboards and the like. There are indeed many patents cited in the Dahl patent all of which pertain to the movement of large items used at public gatherings, concerts and the like, all of which are dubbed “convertible carts” because one portion or another folds down or is moveable, etc. 
   Yet, another approach to convertible carts is found in the patent of Nelson U.S. Pat. No. 4,165,088. This product is for janitorial needs including the disposal of bags of trash. 
   In today&#39;s world, many restaurant owners are expanding their seating capacity by utilizing a portion of the sidewalk adjacent the restaurant after getting the proper permits. Today, on Lincoln Road in Miami Beach, there are several blocks of restaurants all of which use a portion of the traffic closed-off thoroughfare for outdoor seating but at the end of the evening it is necessary to bring in all of the tables and chairs in order to avoid theft, or possible weather damage. 
   There is indeed a need for a cart that transports a multiplicity of chairs from one location to another easily and quickly. The problem is, the cart itself. Carts take up valuable floor space in a restaurant, space that can better be served as an income producing zone. In addition, single purpose carts are only used in the morning before lunch, and in the late afternoon after the dinner or post theatre crowd, depending upon the city locale in question. Thus, single purpose chair carrier carts are not overly cost effective due to their limited usage. There is indeed a need therefore for a multipurpose cart that not only will transport chairs where and when needed, but can also serve as a cart usable by wait staff for serving or by the bus crew for cleaning up. Applicant has devised such a cart. The invention accordingly comprises the apparatus possessing the features, properties, the selection of components which are amplified in the following detailed disclosure, and the scope of the application of which will be indicated in the appended claims. 
   For a fuller understanding of the nature and objects of the invention, reference should be made to the following detailed description, taken in conjunction with the accompanying drawings. 
   SUMMARY OF THE INVENTION 
   A wheeled convertible cart, of the overall size of a supermarket cart, to be pushed by one person, which cart can carry a plurality of up to about eight stackable chairs from a first location to a second location. The movement of the wheeled cart requires but one person, who after the delivery of the chairs for setup or storage, can quickly and easily change the configuration of the cart and then use the cart for other restaurant chores. The cart has a wheeled base, an elevator section for carrying the chairs, and a convertible U-shaped section that is pivotably mounted vertically when chairs are being carried, such as to be out of the way. The U-shaped section pivots downwardly to a horizontal position to carry a trough, tray or board on which restaurant accouterments can be carried. A pivot arm attached to the center of the convertible section engages the cart handle to maintain the convertible section in the vertical position, and the pivot arm engages the base to help support the convertible section in the horizontal position. 
   It is a first object to provide a cart that can be moved by one person and which will carry at least six stacked chairs. 
   It is a second object to provide a cart which while having the capacity to carry chairs from one location to another and which takes up very little floor space. 
   It is a third object to provide a cart that can be quickly and easily converted from a chair carrier to a bussing station. 
   It is a fourth object to provide a convertible cart that uses light weight metal tubing for its body, and rubber rear tires to prevent damage to expensive carpets of a restaurant. 
   It is fifth object to provide a chair carrier having fully pivotable front wheels, and high quality front casters such as to provide instant tight turning radius. 
   Other objects of the invention will in part be obvious and will in part appear hereinafter. 

   
     BRIEF DESCRIPTION OF FIGURES 
       FIG. 1  is a left side elevational view of the apparatus of this invention in the chair carrier orientation with the elevator in the lowered position. 
       FIG. 2  is a view similar to  FIG. 1  with the elevator in the upper position. 
       FIG. 3  is a top plan view of this apparatus. 
       FIG. 4  is rear elevational view of this apparatus with the apparatus in the chair carrier orientation. 
       FIG. 5  is a top perspective view of this apparatus in the cart orientation. 
       FIG. 6  is a right perspective view of this apparatus in the cart orientation. 
       FIG. 7  is a front perspective view of this apparatus in the cart orientation. 
       FIG. 8  is a rear perspective view thereof. 
       FIG. 9  is a closeup view of the elevator mechanism in the upper position. 
       FIG. 10  is a closeup perspective view of a portion of this invention. 
       FIG. 11  is a left side perspective view of the elevator mechanism in the lower position. 
       FIG. 12  is a left side perspective view of the elevator mechanism in the upper position. 
       FIG. 13  is a closeup perspective view of the nose of this invention. 
       FIG. 14  is a bottom perspective view of a portion of this invention in the cart orientation. 
       FIG. 15  is a closeup perspective view of a portion of this invention. 
       FIG. 16  is a front elevational view of a portion of this invention with a tray carrier mounted thereon. 
       FIG. 17  is a top perspective view of a portion of this invention at a point in time with the tray carrier in the process of removal from the apparatus. 
       FIG. 18  is a rear perspective view of a portion of this invention. 
       FIG. 19  is a right front perspective view of the apparatus in the chair carrier orientation with the elevator frame in down position. 
       FIG. 20  is a front perspective view illustrating the use of this device in the chair carrier orientation. 
       FIG. 21  is a right front perspective view illustrating the use of this apparatus in the cart orientation. 
       FIG. 22  is a view similar to  FIG. 19  with the elevator frame in the up position. 
       FIG. 23  is a closeup view of a minor component used in the assembly of the apparatus of this invention. 
       FIG. 24  is a closeup view of the elevator portion adjuster in its operative location. 
       FIG. 25  is a perspective view of a preferred cart tray for use as part of this invention. 
   

   DESCRIPTION OF THE PREFERRED EMBODIMENT 
   In  FIG. 1  the apparatus of this invention is seen in its chair carrying position, which is a first position, from which it converts to a cart for carrying a tray or tub, its material carrying position, which is its second position. From  FIG. 1  it can be discerned that the apparatus is seen to comprise a trio of interconnected sections. The first is the convertible section  12 , which moves from a first or pushing—vertical position, to a second horizontal support position. The second portion  13  is the elevator portion having an elevator platform  27  as a part thereof, and is used to receive and support a plurality of chairs for transit from a first locale to a second locale. The third section is the base or framework section  11 , which carries the wheels  29  and the front casters  14 . Each of these sections will be discussed in more detail infra. If two spaced similar elements are present, they may be designated as “A” and “B” units after the appropriate numerical designation, as in  59 A,  59 B. If the number alone is used, it is being used collectively for both, as  59 . Other numbers may have a letter appear after the numerals as with a T number for throughbore. 
   Reference is now made to  FIGS. 2 and 6  which illustrate the apparatus in the two positions previously mentioned. As seen in those figures, the base  11  comprises a base main member  19  which may be formed of two mirror image parallel tubes  20  and  22  joined at their forward ends to a front arcuate tube  21 . Or base member  19  can just be two tubes, each bent into the form of half of a cathedral window, wherein the two arcuate sections meet a tip point  15  equidistant from each side. Per  FIGS. 6 and 9  there are three spaced cross members  51 - 53  disposed in a spaced relationship from the front tip point  15 . Mounted beneath base main member  19  an equal distance from point  15  is a pair of casters  14 , consisting of frames  25 , each having a caster wheel  23 , in the frame. The frame is retained by a threaded end bolt  24  having a nut  26  thereon. See FIG.  2  and more particularly FIG.  13 . 
   Exiting outwardly and normal to, at the rear of each of the base tubes  20  and  22  and to the rear of vertical tubes  59 A, 59 B, are axle stubs  28  to which are conventionally mounted rubber tire wheels  29 ; one on each of the left and right sides of the cart. 
   Reference is made again to FIG.  13 . Here the pipe stub  48  is seen in closeup. What is not seen, but which is shown in dashed lines is the smaller stub  48 A which may be a solid or tubular section, of a slightly narrower dimension. That is,  48 A has an exterior diameter equal to the interior diameter of  48  and the interior diameter of pivot arm  60 . Smaller stub  48 A is welded or otherwise attached within the confines of stub  48 , such that the pivot arm fits over it during engagement as is seen in FIG.  13 . 
   The discussion now moves to the elevator frame  33 , seen in  FIGS. 2 ,  5 ,  6  and  11  among others. In  FIG. 3  it is seen from the underside, as this figure is a bottom plan view of the apparatus. Frame  33  is a generally rectangular member formed of two parallel spaced and aligned long tubes  34 ,  35  that extend along the front to rear axis of the apparatus. These are connected at their respective front ends a brace  37  which has its wider dimension disposed vertically and its thickness disposed transversely, a mid-cross rod  38  and a rear cross-member  50  disposed spaced slightly from the rear end of the parallel tubes  34 ,  35  of the elevator  13 . This brace  37  serves to stabilize the elevator platform  27  of the elevator portion  13 . Each of the two tubes  34 ,  35  has an upstanding flange  36  at the rear end thereof. All of these components are seen in FIG.  6 . At the rear of each of the tubes  35 ,  34  of the frame  33  there is an upstanding flange  36  which serves as a stop to prevent the rearward sliding of chairs when disposed thereon as will be explained infra. 
   Square tube  32  has a rearwardly disposed flange  32 F for attachment of a hydraulic damper per below. Square tube  32  also has a pair of aligned bores  39  at its upper end, through which passes x-rod  38 . See  FIGS. 11 &amp; 12 . Disposed within the tube  32  is a slider  54  which slider is fixedly secured to the front cross member  51 . 
   The piston  44  of hydraulic damper  43  has a pin receiving terminus which is pinned to the flange  32 F in a conventional manner. See FIG.  12 . Slider  54  per  FIG. 22  is vertically fixedly secured to the front cross member  51  and it has a bore spaced up slightly from the lower end thereof. A pin  55  passes through the unnumbered bore in slider  54 . This pin  55  is spaced up slightly from front cross member  51 , and is pinningly connected to each of a pair of spaced parallel and aligned first elevator links  30  to permit movement of the left and right links  30 . See  FIGS. 6 and 22 . 
   Links  30  are spaced apart in alignment, and each is pinningly connected to a respective left and right second link  31  per  FIGS. 2 ,  19  and  22  among other views at one end thereof by pin  57  seen in FIG.  6 . The second end of each of the two spaced second links  31  are respectively pinningly connected to a respective laterally outwardly extending boss  56  located at about the midpoint of the elevation of square tube  32 . 
   One of a parallel pair of spaced, slotted, long rods  42  are each connected at one respective end, the forward end, to the one of the same respective pins  57  between each of the pairs of the two links  30  and  31 . See FIG.  12 . The second end, the rearward end of each slotted, long rod  42  is pinningly connected to one of a respective pair of triangular plates,  58 . See FIG.  11 . Triangular plate  58  as per  FIG. 12  is seen to have a base  58 A which has an extended section that directed outwardly past the junction of the hypotenuse  58 C to the base  58 A. It is on this extended flange that the junction with slotted, long rod  42  is situated. Backing up to  FIG. 11 , it is seen that the triangular plate  58  has the extended base  58 A, and a somewhat vertical side  58 B disposed normal to the base, and a hypotenuse  58 C, connecting the second end of the somewhat vertical side  58 B to a point spaced in from the end of the base  58 A, rather than at the terminus of the base  58 A. The portion that extends out past this junction is designated  58 E, per FIG.  11 . 
   It is to be noted any and all of the pinningly connected junctions comprise a bolt having only terminal threads, which bolt carries suitable spacer washers, and which is threadedly engaged to a suitable nut to permit rotation around the nonthreaded portion of the shaft as is deemed to be a conventional connection in today&#39;s world. 
   The rear cross member  53  previously referred to, has a pair of spaced upstanding flanges  53 F each of which is bored for pin connection through the right angle corner of the triangle plate  58 . The spacing of each of the flanges  53 F is aligned to match the spacing between the respective slotted, long rod  42  and the respective junctions with the two links  30 ,  31  on either side of box tube  32 . Each of the two apexes or junctions of the sides “C” and “A” of the two triangle plates  58  is pinningly connected to a short link  78  per FIG.  11 . At the lower or more forward of the two triangles to short link connections, the pin connecting them is threadingly disposed into a rubber-covered roller  79 . At the proximal end of the short link pair  78 , a second rubber roller  80  is connected between the two links by a pin. Each of the roller connections between the spaced links is a threaded pin  81  having a nut thereon to permit rotation of the roller when stepped upon. The two spaced rollers together, separated by the length of the short link  78  serve as a foot pedal, designated  84 , in a manner to be discussed infra. Thus while the rollers are able to rotate individually, they are held in position, and are moved upwardly by the top of the shoe, and downwardly by the shoe sole. 
   Another component on the base to be discussed is the hydraulic damper,  43 . This hydraulic damper  43 , includes a sliding piston  44  seen in  FIGS. 2 and 6  among other figures. The hydraulic damper is mounted at about a 45-degree angle by mount flange  45  to the middle cross member  52 . This mount flange circumscribes the lower part of the damper and is bolted in place to the X-member  52 . A pin  73  passes through a rounded terminus of the upper end of the piston  44  which is disposed in the rearwardly directed flange  32 F of the square tube  32 . This pin ties the piston to the square tube. See  FIGS. 12 and 22 . The hydraulic damper serves to do its function; namely, to dampen the movement of the foot pedal  83  which is the combination of the pair of spaced short links  78  and the two rollers  79 ,  80 -disposed there between. Basically, it helps to prevent slippage of the elevator portion  13  from one position to the other. 
   The movement of foot pedal  84  moves the elevator portion  13  from its lower position to its upper position. In  FIGS. 6 and 11  the pedal is in the upper location and the elevator  13  is down. Contrast the movement of the interconnected links to  FIG. 12  wherein the pedal is down and the elevator  13  is in its upward location. Contrast also FIG.  21  and  FIG. 22 , which are seen from the same vantage point with the elevator up—pedal down in FIG.  22  and elevator down—pedal up in FIG.  19 . 
   Reference is now made to, and contrast should also be made between  FIGS. 1 ,  6 ,  11 ,  19  and  21  on the one hand, wherein the elevator supports  34  &amp;  35  are tipped forwardly, the normally empty position and  FIG. 2 , versus  FIGS. 2 ,  12 ,  2  and  22  wherein the elevator supports  34  &amp;  35  are canted rearwardly, i.e., the position when chairs are to be carried. The purpose of this contrast is to draw attention to a little noticed feature and consequently a little noticed benefit of the apparatus of this invention. 
   That feature is the ability to adjust the actual elevation of the elevation supports  34  and  35  to ensure that when in the down position that all four feet of the chair land at the same time. The discussion therefore centers on FIG.  24 . 
   First it is necessary to point out that most plastic stacking chairs have the rear of the chair slightly lower than the front of the chair to aid in stacking. That fact keeps the chair stack from pitching forward, and makes the stack more stable. When the elevator portion  13  is in the down and forward position, the elevator is able to easily slip under the rear of either individual chair  117 , or a plurality of stacked stacking chairs. When the elevator portion  13  is raised, the stack of chairs  115  per  FIG. 20  leans rearwardly against the two pivotable support tubes  62 A and  62 B, because the elevator portion  13  is tilted rearwardly. 
   The structural component that not only provides this action, but which also permits the stack of chairs  117  to descend with all four feet hitting the ground at one time is the adjustment cylinder  40  with its piston  41  seen in such Figures as  2 , and  11  and  12  among others but with full particularity in FIG.  24 . 
   Cross member  50  has a pair of spaced, aligned, bored flanges  50 F, through which is disposed at threaded on both ends pin  68  which pin is retained by a pair of nuts  69 , one on each set of threads. Disposed on the shaft of the pin  68  is one of a pair of opposed adjustable cylinder mounts  47 . Cylinder mount  47  is a ball bearing containing annulus that rides on the shaft  68 . The mount  47  is disposed at one end of the threaded shaft  41  disposed within cylinder  40 . A second similar but oppositely disposed threaded shaft also extends into cylinder  40 . A nut  41 N is disposed on each shaft adjacent the cylinder such that movement of the nuts relocates the cylinder. The lower shaft  41 B has a mount head  47 B similar to the mount head  47 , but which is disposed on a roller  100 . This roller is threaded at both ends and rides within the confines of the spaced opposed slots  42 S of slotted long rods  42 . Adjustment of these two nuts influences the plane of the elevator portion  13  at both the upper position and the lower position. The adjustment range is within the area of ½ to 1.5 inches for most stacking chairs to ensure that all 4 feet of the lowermost chair impact the floor at the same time. This ensures that the stack does not pitch forward after disposition from the convertible cart of this invention. 
   The discussion moves down to the third portion of the invention; namely, the convertible section  12 , see in FIG.  1 . Reference is also made to  FIGS. 2 ,  10 , and  11 . This section includes the upstanding spaced rear vertical support tubes  59 A,  59 B which are connected as by welding to the base  19  at about a 90-degree angle. As seen in  FIGS. 2 ,  5 ,  6 , and  9 , the respective rear angled supports  67 A and  67 B are disposed at about a 45-degree angle from about the rear midpoint of their respective vertical rear support tubes  59 A,  59 B to a point where they are welded or other wise connected to a respective candy cane shaped member  68 A,  68 B. These two tubular members are welded at their interface, and the second end of the members  68  is welded or otherwise connected, to the rear of the rearmost cross member  53 . See particularly FIG.  9 . The two respective members  59  and  68  can be connected together or formed as one integrated unit as maybe desired. Per  FIG. 10 , right at the top of each rear vertical tube  59  is a small area  83  just above the angled junction of the hand side tubes  66  designated  83 . Here on the interior side of the tube  59 A is a rearwardly disposed semi-arcuate flange  75  having a through bore  76  which serves to. While not shown on the respective  59 B tube, such bored flange is also contemplated on that tube as well. 
   Pin  77  seen in  FIGS. 1 ,  10  and,  22  located in small area  83  extends across the width of the respective tubes  59  and serve to retain the pivot support tubes  62 A and  62 B in the desired position. Two of these are present in opposed position though one is not readily seen in FIG.  10 . As can be seen in  FIG. 23 , each such pin  77  has a head  77 H, and a shaft  77 S. The shaft has a partial slot  85  therein, deemed partial because it does not extend all the way through the shaft  77 S. Set screw  87  seen also in  FIG. 10 , disposed in the respective vertical tube  59  rides in the slot and prevents the movement of the pin  77  out of its unnumbered bore. Movement of each pin is also limited by a cotter pin there through. When the pin  77  is disposed inwardly through the pivot tube  62 A or B of convertible section  12 , the pivot tube cannot move upwardly. When the spring in  77  is moved to the outward position, yet retained by the set screw, the pivot tubes can be moved to the upward position for the chair carrying function. 
   The two spaced hand side tubes  66 A,  66 B are connected at their upper ends by an interposed inverted U tube  61  having a clevis  64  forwardly and downwardly disposed therefrom. This clevis  64  has a pair of aligned through bores,  65 . Pivot arm  60  can be retained in the clevis by a pin to be disposed through the pivot arm  60  and the through bores  65 . See FIG.  4 . 
   Per  FIG. 6 , it is seen that pivot arm  60  is retained at its upper end by a pin  71  disposed through clevis  70  which has a pair of aligned through bores therein  69  noted in FIG.  4 . Whereas pivot arm  60  is permanently pivotally attached to clevis  70 —see also  FIG. 15 , it is releaseably attached to clevis  64  such that the pivot arm can assume two positions, disposed in clevis  64 , or in pipe stub  48 . Pipe stub  48  is of the same cross section as pivot tube  60 , and is welded onto the base at front point  15 . It has an upstanding hidden section, of slightly narrower cross section, linearly and outwardly directed. The hidden section is sized to nest within the free lower portion of pivot arm  60 . This hidden section has a cross bore through which the U pin  88  is disposed for releaseably anchoring the pivot arm  60  to the base. This can be seen in  FIGS. 6 &amp; 7  and  13  at front point  15  on the base. 
   The next section for detailed discussion is the convertible section  12 . A pair of spaced convertible support tubes  62 A and  62 B per  FIGS. 2 , and  4  are seen to be pivotably connected to area  83  at the top of the respective vertical tubes  59 , that is  59 A and  59 B. The tubes  62 A,  62 B are seen in  FIG. 2  to be in the vertical position, the position to be assumed when the convertible cart is to be used for carrying chairs. These two spaced convertible tubes are connected to the interposed inverted U-tube  61 . See FIG.  2  and FIG.  4 . It is within the scope of this invention to make the two tubes  61 A,  61 B and the inverted U-tube  61  as a single integrated tube. Disposed rearwardly at about the midpoint of the tube  61  is a clevis  70  to which the pivot arm  60  is permanently pinningly engaged, such that it can dangle and be relocated as needed according to the invention. See supra. While a clevis is disclosed, other releaseable arm engaging means may be employed instead. 
   For quick reference  FIGS. 1 ,  2 ,  19 ,  20  and  22  all show the convertible cart with the convertible U-shaped section  12  comprising the pivotable support tubes  62  in the vertical position and the pivotable arm  60  pinned to the clevis  64 , which is mounted on handle  63 . In contrast  FIGS. 3 ,  6 ,  7 ,  8 , and  21  all show the cart being used to carry dishes and other items. Here the pivotable support tubes  62  are in a horizontal position, and the pivot arm  60  is pinningly engaged to the front of the base at location  15 . 
   USE OF THE INVENTION 
   As has been explained in detail, the key to success of this cart is the convertibility. That is, the convertible section  12 &#39;s ability to move from a first vertical to a second horizontal position and be retained in each such position. As noted supra, the combination of the spaced tubes  62  and the interposed inverted U tube  61  are pivotably mounted at location  83  spaced up from the base. When this section is in the vertical position as per  FIG. 19 , and the pivot arm  60  is engaged to the handle  63 &#39;s clevis  64 , the convertible section is retained vertically. Note how the elevator is down and the foot pedal (comprised as noted of the short link  78  and the two rollers  79 ,  80 ) is up in this same  FIG. 19. A  person can then place a stack of stacking chairs on the elevator as is shown in FIG.  20 . Prior to moving the cart, the foot pedal is pushed downward such that the elevator is moved upwardly from a slightly forwardly tilted position, designed for loading—see FIG.  1 —to a slightly rearwardly tilted position for transportation, with the foot pedal down per FIG.  22 . The little stop or rest  36  helps to hold the load of chairs in place. The hydraulic damper serves to ensure a smooth transition of the linkage from a first positive location to a second positive location when the foot pedal is user actuated. It is believed that a detailed explanation of the movement of each link when the foot pedal is actuated is not needed as such lies within the skill of the art, since the connection of each of the links individually has been recited. The relationship of the foot pedal&#39;s connection to the spaced triangles  58 , in turn to the slotted, long rods  42 , and the links  30  and  31  and their connection to the square tube  32 , such that the tube  32  can ride upwardly on the slider  54  seen best in  FIG. 12 , is readily understood by those skilled in the art. So too is the connection of the damper to the square tube readily seen from a contrast of  FIG. 11  to FIG.  12 . 
   The discussion now turns to the mounting of cart-tray  90  to the cart as is seen in  FIGS. 3 ,  6 ,  7 ,  10  and  14 . This cart-tray has a base  91 , of a generally rectangular shape. See FIG.  5 . It has spaced side walls  92  and front and back opposed mirror image raised arms pairs  93 , which are interconnected in back and front, by handles  94 . The ends  95  of said cart-tray are seen in  FIGS. 7 ,  8 , and in closeup in  FIG. 16  depend downwardly between the arms  92  are preferably cut out at locations  96  in front and back in a hemispherical pattern to best receive the tubular convertible arms of section  12 . See also  FIGS. 14 and 16 . Reference to the frozen in time view of  FIG. 17  illustrates how the cart-tray fits on the convertible section  12  after the rear of the cart-tray has been disposed on section  12 , best seen in FIG.  18 . 
   As can be seen by returning back to  FIG. 6 , the cart-tray  90  is capable when mounted to hold a dirty dish trough. As seen in  FIG. 14 , a stack of folded napkins  98  are sticking off the cart-tray  90 . Also seen is a large pepper grinder  97  as is often found on the table of fancy restaurants. 
   Of course the cart can be used in this position to carry many other things on the cart-tray such as silverware, vases of flowers, etc. 
   It was mentioned earlier that a flat piece of wood such as plywood can also be placed on the convertible section when horizontal and be permitted to hang over the two sides and perhaps even the front slightly, in order to move other items that might not fit within the confines of the cart-tray. These include such restaurants found items as amplification systems, small lecterns, wedding cakes, etc. While not illustrated, it is within the skill of the art to understand this concept since the small sheet of plywood would merely rest on the convertible section, when the convertible section is placed and pinningly locked into the horizontal position. 
   In addition to the cart tub  90  discussed supra for mounting on the cart of this invention, Tray  110 , the preferred tray as seen in  FIG. 25  can also be used. This tray  110  is about 15.625 width by 23.25″ long by 1.75 high with the shelf recessed about ½ inch from the top. The two end walls  111  each have the cathedral window cutouts for disposition of the try upon the cart in the same manner as handled tray  90 . This tray is more intended to receive other items for use in a restaurant, rather than a deep stack of dirty dishes. Thus flower arrangements, napkin holders, and other service items can be neatly presented to the diners, as opposed to being recessed out of view in the tray  90 . 
   While the discussion for the most part about this invention has centered on its use for moving and relocating a plurality of stacking chairs, or when the pivot arm is down, for transporting dishes and other restaurant items such as roasts for carving or floral decorations. The cart of this invention is strong enough to be used for transportation of an elderly or incapacitated person while sitting either in a stack chair or a light weight wheel chair, from point A such their room in a convalescent hospital to point B, the dining room or to point C, the TV lounge of the convalescent hospital. Of course, it is understood that a seat belt holder would be welded to each of the two pivot arms for one of the two portions of a seat belt. Such minor engineering is within the skill of the artisan. Or in the alternative the seat belt could be built onto the chair to be carried by the cart of this invention. 
   The benefit of moving the person in a stack chair is that they would then be seated in a chair probably quite similar to what other elder or incapacitated persons might be using at point B or point C at institution. Thus, any potential for a feeling of embarrassment due to differences is eliminated. 
   The discussion heretofore has been on the convertability factor of the cart of this invention. Thus as spelled out supra, pin  77  permits the rotation of the pivot support tubes  62 A and  62 B to change the cart from a chair carrier to a dish, pot, linen etc. carrier and back. But there may be customers who have no need for the convertability factor. For them, pins  77  can be eliminated, such that tubes  62 A and  62 B are constructed permanently attached through nesting or welding among other modes to their respective lower positioned respective tube  59 A and  59 B. In such instance the position of the cart as shown in  FIG. 2  would be a permanent one. Since this minor construction deviation is deemed to be well within the skill of the art, no separate illustration is deemed necessary. 
   The apparatus of this invention may be made of metal for stability. It is also envisioned to use plastic for all or some of the parts hereof. The cart-tray when used may be made of plastic, or hard rubber or metal as may be desired. 
   Since certain changes maybe made in the described apparatus without departing from the scope of the invention herein involved, it is intended that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.