Abstract:
A transport apparatus is arranged to include a platform pivotally mounted relative to and within the legs of a table structure, whereupon the platform includes lever apparatus to cantilever the platform and project wheel members of the platform to engagement to an underlying support surface to permit rolling support of the table structure.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The field of invention relates to transport structure, and more particularly pertains to a new and improved transport apparatus arranged to provide for the mobility of a support table. 
     2. Description of the Prior Art 
     Various transport apparatus such as dollies and the like are indicated in the prior art by the U.S. Pat. Nos. 4,846,485; 4,088,337; 3,913,763; 4,277,075; and 3,735,996. 
     The instant invention attempts to overcome deficiencies of the prior art by providing for a transport platform or dolly structure mounted relative to a table permitting pivoting of the dolly relative to the table providing cantilevered support of forward legs of the dolly and in this respect, the present invention substantially fulfills this need. 
     SUMMARY OF THE INVENTION 
     In view of the foregoing disadvantages inherent in the known types of transport apparatus now present in the prior art, the present invention provides a transport apparatus employing a dolly member pivotally mounted below a table within the table legs. As such, the general purpose of the present invention, which will be described subsequently in greater detail, is to provide a new and improved transport apparatus which has all the advantages of the prior art transport apparatus and none of the disadvantages. 
     To attain this, the present invention provides a transport apparatus arranged to include a platform pivotally mounted relative to and within the legs of a table structure, whereupon the platform includes lever apparatus to cantilever the platform and project wheel members of the platform to engagement to an underlying support surface to permit rolling support of the table structure. 
     My invention resides not in any one of these features per se, but rather in the particular combination of all of them herein disclosed and claimed and it is distinguished from the prior art in this particular combination of all of its structures for the functions specified. 
     There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated. There are, of course, additional features of the invention that will be described hereinafter and which will form the subject matter of the claims appended hereto. Those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention. 
     Further, the purpose of the foregoing abstract is to enable the U.S. Patent and Trademark Office and the public generally, and especially the scientists, engineers and practitioners in the art who are not familiar with patent or legal terms or phraseology, to determine quickly from a cursory inspection the nature and essence of the technical disclosure of the application. The abstract is neither intended to define the invention of the application, which is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way. 
     It is therefore an object of the present invention to provide a new and improved transport apparatus which has all the advantages of the prior art transport apparatus and none of the disadvantages. 
     It is another object of the present invention to provide a new and improved transport apparatus which may be easily and efficiently manufactured and marketed. 
     It is a further object of the present invention to provide a new and improved transport apparatus which is of a durable and reliable construction. 
     An even further object of the present invention is to provide a new and improved transport apparatus which is susceptible of a low cost of manufacture with regard to both materials and labor, and which accordingly is then susceptible of low prices of sale to the consuming public, thereby making such transport apparatus economically available to the buying public. 
     Still yet another object of the present invention is to provide a new and improved transport apparatus which provides in the apparatuses and methods of the prior art some of the advantages thereof, while simultaneously overcoming some of the disadvantages normally associated therewith. 
     These together with other objects of the invention, along with the various features of novelty which characterize the invention, are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and the specific objects attained by its uses, reference should be had to the accompanying drawings and descriptive matter in which there is illustrated preferred embodiments of the invention. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The invention will be better understood and objects other than those set forth above will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein: 
     FIG. 1 is an isometric illustration of the invention in use. 
     FIG. 2 is an isometric illustration of a dolly structure. 
     FIG. 3 is an isometric illustration of the table leg clamp structure. 
     FIG. 4 is an orthographic side view of the table leg clamp structure without the associated support tube. 
     FIG. 5 is an orthographic top view of the table leg clamp structure. 
     FIG. 6 is an orthographic side view of the table skirt clamping structure. 
     FIG. 7 is an orthographic frontal view of the table skirt clamping structure. 
     FIG. 8 is an orthographic top view of the dolly structure. 
     FIG. 9 is an orthographic side view of the lever plate in cooperation with the actuator link. 
     FIG. 9a is an orthographic side view of the lever plate mounted and associated with the side wall clamp structure. 
     FIG. 10 is an orthographic side view of the linkage structure in use. 
     FIG. 11 is an orthographic side view of the linkage structure projecting the dolly towards an underlying surface to effect lifting of forward legs of the associated support table. 
     FIG. 12 is an isometric illustration of the linkage structure. 
     FIG. 13 is an orthographic end view of the dolly structure mounted within the table. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     With reference now to the drawings, and in particular to FIGS. 1 to 13 thereof, a new and improved transport apparatus embodying the principles and concepts of the present invention and generally designated by the reference numeral 10 will be described. 
     More specifically, the transport apparatus 10 of the instant invention essentially comprises a table member 11 arranged to accommodate a workpiece &#34;W&#34; thereon, wherein the table member includes a plurality of forward table legs 12 spaced from rear table legs 13. The table member 11 includes a table support top plate 15, with a table side wall flange 14 extending therefrom in a downwardly extending perimeter relationship relative to the top plate 15. A carriage plate 16, or dolly, is positioned below the top plate 15. The carriage plate 16 includes a forward end wall 17 spaced from a rear end wall 18, a carriage plate top wall 19 spaced from a carriage plate bottom wall 20, with the carriage plate including carriage plate side walls 22. Spaced caster wheels 21 are mounted to the carriage plate bottom wall 20 in adjacency to the rear end wall 18, as illustrated in FIG. 2, with one of the caster wheels positioned typically adjacent one of the side walls 22. Projecting orthogonally relative to each of the side walls 22 is a carriage plate axle 23 positioned in adjacency to the carriage plate forward end wall 17. Each of the carriage plate axles 23 are received within a respective axle bore 24, with the carriage plate axles 23 linearly aligned relative to one another. An axle fastener 25 directed threadedly through the forward end wall 17 intersects the respective axle bore 24 to capture and secure a respective carriage plate axle 23 therewithin in an adjustable relationship. As illustrated, the carriage plate axles 23 may extend pivotally through one of the forward table legs 12 permitting pivoting of the carriage plate relative to the table member 11. 
     The FIGS. 3-5 indicate the optional employment of a table leg clamp 27, having a table leg clamp receiving slot 28 to receive an associated table leg therewithin, with a plurality of table leg slot fasteners 29 directed through the table leg clamp 27 intersecting the table leg receiving slot 28 to secure an associated table leg 12 therewithin. An axle receiving tube 30 is mounted to the table leg clamp 27 by means of a tube boss 32, wherein an axle receiving tube fastener 31 directed into the axle receiving tube 30 is arranged to secure an associated axle 23 received therewithin, in a manner as indicated in phantom in FIG. 5, upon securing an associated table leg clamp 27 to one of the table legs 12. 
     As illustrated in FIG. 1 and in FIG. 6, a table side wall clamp 33 is provided. The side wall clamp 33 is arranged to secure articulated linkage in cooperation relative to the table side wall 14 medially of the rear table legs 13. The side wall clamp 33 includes a side wall clamp receiving slot 34 to receive the side wall therewithin, wherein a side wall fastener 35 threadedly directed through the side wall clamp and the receiving slot 34 is directed through the table leg side wall flange 14 to secure the table side wall clamp 33. The linkage accordingly extends from the side wall clamp 33 to an associated mounting flange 26 orthogonally mounted to the carriage plate top wall 19 intermediate the side walls 22. 
     A side wall clamp 33 having clamp boss plate 36 projecting parallel relative to one another and orthogonally relative to the side wall clamp 33 is provided. A lever plate 39 is provided, having a lever plate first end received between the clamp boss plates 36 that are in turn mounted to the side wall clamp 33 front wall 37, with a lever axle 38 extending orthogonally through the clamp boss plates 36 and the lever plate 39 first end. A lever plate pedal flange 40 is mounted to the lever plate second end, in a manner as illustrated in FIG. 1. An actuator link 41 is provided (see FIG. 10 for example), wherein the actuator link includes a first leg tube 42 spaced from a second leg tube 43, having a central rod 44 slidably received within the first and second leg tubes 42 and 43 respectively, with first and second actuator link fasteners 45 and 46 threadedly directed into the first and second leg tubes 42 and 43 to engage a central rod 44 to provide for adjustment of effective length of the actuator link 41. A second actuator link leg tube axle 47 pivotally mounts the second leg tube 43 intermediate the mounting flanges 26, with a first tube axle 47a pivotally mounting the actuator link first leg tube 42 to the lever plate 39, as illustrated in FIG. 10 for example. 
     A securement leg 48 is provided, having a first end axle 49 pivotally mounting the securement leg first end about the actuator link first leg tube 42, with a securement leg spring 50 mounted between the securement leg and the actuator link first leg tube 42. The securement leg 48 includes a row of engaging teeth 51 arranged to engage a lever plate engaging flange 53 mounted fixedly to the lever plate 39 extending laterally thereof, with the engaging flange 53 oriented between a plurality of the engaging teeth 51, with the engaging flange 53 maintained by means of pressure to the teeth when the lever plate 39 is rotated to project the actuator link 41 to extend the carriage plate 16 to an underlying support surface and effect lifting of the forward legs 12 of the table 11. A securement leg handle 52 effects ease of separation of the teeth relative to the flange 53 to disengage and permit lifting of the carriage plate relative to the first position, as illustrated in FIG. 10, from the second position, as illustrated in FIG. 11. 
     Accordingly, projection of the linkage to the second position, as illustrated in FIG. 11, permits lifting of the table member forward legs 12 permitting a handcart type usage of the table and transport of the associated workpiece &#34;W&#34;. 
     It should be further noted that the spring 50 is of tension to displace and dislodge the teeth 51 from the flange 53. Further if desired, a spring may be directed from the securement leg 48 to the second tube 43 of greater strength than the spring 50 to enhance securement of the associated securement leg 48 to the engaging flange 53. 
     As to the manner of usage and operation of the instant invention, the same should be apparent from the above disclosure, and accordingly no further discussion relative to the manner of usage and operation of the instant invention shall be provided. 
     With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of the invention, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present invention. 
     Therefore, the foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.