Abstract:
A portable oven includes a foldable cooker and a chassis, and the foldable cooker has two symmetric sets of heating boxes, each having an electric heater installed therein and connected to an external power supply for producing heat, and a replaceable cooking utensil placed above the electric heater, so that when the electric heater is on, different ways of cooking can be accomplished. An axle is installed between the two heating boxes; the two heating boxes can be folded together for an easy carry after its use; a lock device is installed above the chassis and below the cooker to secure the opened oven onto the chassis for cooking.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention generally relates to a portable oven, and more specifically to an oven for cooking steaks, teppanyakis, hotdogs, hamburgers, and other different foods, which facilitates its cleaning, oil collection, environmental protection and economic way of use. 
   2. Description of the Related Art 
   As physical life is enhanced, people pay more attentions to the quality of life and expect to adjust the fast pace of our life by having leisure activities. People nowadays often have leisure activities, and barbeque is considered as one of the most favorable activities, not only relaxes ourselves, but also allows us to taste delicious food. 
   However, a traditional barbeque activity requires lots of preparation for various barbeque tools such as a barbeque stand and charcoals, in addition to the preparation of food. Although these things are not difficult to get, yet different kinds of cooking require different equipments. Therefore, the whole barbeque activity may turn into a totally unhappy event if preparation is done properly, which not only ruins the mood of having fun, but also causes unnecessary arguments among friends. 
   Further, lots of garbage or waste oils are remained after a conventional barbeque activity is held, and such activity definitely causes pollutions to the environment after a period of time, and thus not complying with the requirements of environmental protection. 
   In view of the foregoing shortcomings, the inventor of the present invention designed a comprehensive stove that integrates various cooking utensils, and such stove must be simple-to-use, easy-to-carry, and also in compliance with the requirements of environmental protection, and finally invented a portable oven after conducing extensive researches and experiments. 
   SUMMARY OF THE INVENTION 
   It is a primary objective of the present invention is to provide a portable oven which requires a simple operation for carrying out various kinds of barbeque activities. 
   Another objective of the present invention is to provide a portable oven having a light and small size which is easy to carry, not only can be transported by sport utility vehicles, but also can be stored in a small area at home to maximize its values. 
   A further objective of the present invention is to provide a portable oven that is in compliance with the requirements of environmental protection, easy to clean and convenient to collect waste oils so as to leave cleaning problems after an enjoyable activity. 
   To achieve the foregoing objectives, the portable oven comprises a foldable cooker and a chassis, wherein the foldable cooker have two symmetric sets of heating boxes, each heating box having an electric heater installed therein and driven by an external power supply and installs different cooking utensils as to achieve the functions of cooking steaks, teppanyakis, hotdogs and hamburgers. Further, the waste cooking oil can be collected easily and the condiments for cooking can be accessed conveniently. An axle is installed between the two heating boxes, and the two heating boxes can be taken apart and stacked with each other after use. A handle is installed separately on the external distal ends of the two heating boxes, so that when the two heating boxes are combined, the handle can be held by hands to facilitate its carry. Further, the chassis can be spread open or folded to give a convenient way for transportation and storage. If the chassis is spread open, the foldable cooker can be placed on top of the chassis for cooking. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a view of a preferred embodiment of the present invention; 
       FIG. 2  is a schematic view of a folded cooker according to the present invention; 
       FIG. 2A  is a schematic view with a 180 degree rotation of  FIG. 2  that illustrates the power indicating lamp according to the present invention; 
       FIG. 3A  is a view illustrating the principle of the movement of a hotdog broiler according to the present invention; 
       FIG. 4  is a perspective view of the cooker being spread open according to the present invention; 
       FIG. 5  is a schematic view of the structure of a deluxe chassis being spread open according to the present invention; 
       FIG. 5A  is a schematic view of a rotary stand of a deluxe chassis being spread open in X-shape according to the present invention; 
       FIG. 6  is a schematic view of the structure of a deluxe chassis being folded according to the present invention; 
       FIG. 7  is a view illustrating the principle of the movement of a limit pillar of a primary support base according to the present invention; 
       FIG. 8  is a view of the principle of the movement of latching a latch handle a lateral support base according to the present invention; 
       FIG. 9  is a view of the installation of a condiment box and an oil collecting box according to the present invention; 
       FIG. 10  is a view of the installation of a grill for cooking steaks according to the present invention; 
       FIG. 11  is a view of the installation of an iron plate for teppanyakis according to the present invention; 
       FIG. 12  is a view illustrating the principle of the actions of cooking hamburgers according to the present invention; 
       FIG. 12A  is another view illustrating the principle of the actions of cooking hamburgers according to the present invention; 
       FIG. 12B  is another further view illustrating the principle of the actions of cooking hamburgers according to the present invention; and 
       FIG. 13  is a schematic view of the structure of a simple support stand according to the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   The technical characteristics of the present invention will become apparent in the following detailed description with reference to the accompanying drawings of an embodiment which serves as a preferred embodiment; however, such preferred embodiment is not intended to limit the scope of the present invention. 
   To make it easier for our examiner to understand the objective of the invention, its structure, innovative features, and performance, we use a preferred embodiment together with the attached drawings for the detailed description of the invention. 
   Referring to  FIGS. 1 ,  2  and  2 A, the present invention comprises a foldable cooker  1  and a chassis  2 , wherein the cooker  1  can be spread open and fixed onto the chassis  2 , and then a power supply is connected to provide different various cooking functions. 
   The foregoing cooker  1  includes two symmetrical sets of heating boxes  11 , each having an electric heater  12  installed therein, and its power cable  13  is installed next to the heating boxes  11  and proximate to the connecting position of the two heating boxes. A power indicating lamp  131  is installed on a lateral side of the cooker opposite to the power cable  13  as shown in  FIG. 4A , and a replaceable cooking utensil  3  is placed above the electric heater  12 . After the power cable  13  is inserted and connected, the electric heater  12  is driven to produce heat to carry out different cooking actions by the different cooking utensils. 
   Referring to  FIG. 3 , the cooking utensil  3  of this preferred embodiment could be a hotdog broiler, and the hotdog broiler comprises a base  31  and a motor  32  installed inside an end of the base  31 , and the motor  32  is eccentrically installed at an output axle  321  to facilitate the installation of the motor  32 , and a power plug  33  is protruded downward and corresponds to a power socket  14  disposed at a surface of the cooker  1 , and a hotdog stand  31  is disposed on the base  31 , and the hotdog stand  31  has a plurality of rotary pipes  35 , and the pipes  35  are coupled with each other by a gear  36 , such that all of the pipes  35  are rotated in the same direction and one of the pipes  351  is extended outside the hotdog stand  34  and latched to an output axle  321  of the motor  32  when being placed into the base  31 . If the motor is rotated, the gear  35  synchronously drives each pipe  35  to rotate and carry out the function of broiling hotdogs. 
   Referring to  FIGS. 2 and 4 , an axle  15  is installed between the two heating boxes  11 , and the two heating boxes  11  can be separated and stacked with each other after use, and a handle  16  is installed at an external end of the two heating boxes  11 . After the two heating boxes are engaged with each other, the handle  16  can be held for facilitating its carry. 
   Referring to  FIGS. 5 and 6 , the chassis  2  is of a deluxe design comprising a primary support base  21 ; wherein the primary support base  21  has a symmetrical lateral support base  22  separately disposed on both sides, and the two lateral support bases  22  are coupled with the primary support base  21  by a rotary stand  23 , and the rotary stand  23  can be X-shaped as shown in  FIG. 5 , such that the two lateral support bases  22  can be attached to the primary support base  21  for an convenient carry or can be spread open for disposing the cooker  1 , and the primary support base  21  has a positioning hole  24 , and the two lateral support bases  22  have a positioning groove  25  and a positioning pillar  17  correspondingly protruded from the back of the cooker  1  that is latched into the positioning hole  24  or the positioning groove  25  respectively. 
   The foregoing positioning hole  24  has a limit pillar  26  protruded from the positioning hole  24 , and a latch hole  171  is disposed on the positioning pillar  17  corresponding to the cooker  1 , such that the latch hole  171  is latched into the limit pillar  26  for enhancing the positioning effect. 
   Referring to  FIGS. 7 and 8 , the primary support base  21  comprises a press button  27  disposed on one side of the primary support base  21 , and the press button  27  drives a link rod  271 , and the link rod  271  connects the limit pillar  26  and controls the limit pillar  26  to be withdrawn into the primary support base  21  for facilitating an installation or removal of the cooker  1 , and the press button  27  and the wall of the primary support base  21  have a spring  272 , such that when the press button  27  is released, the limit pillar  26  resumes its original position by the resilience of the spring  272 . 
   Further, the lateral support base  22  comprises a press button  28  at its external side, and the press button  28  pushes a latch handle  281 , and both ends of the latch handle  281  have a latch hook  282 , and a latch hole  211  is disposed on the corresponding sides of the primary support base  21  for fixing the latch hook  282  into the latch hole  211 . When the press button  28  is pressed, both ends of the latch handle  281  are pressed to shift outward, so that the lateral support bases  22  are detached from the primary support base  21 . After the press button is released, the latch hooks  282  disposed on both ends of at handle  281  resume their original positions by the resilience of the spring  283  to achieve the locking effect. 
   Referring  FIGS. 5 ,  6 , and  9 , the primary support base  21  comprises a condiment box  28  for placing condiments and accessing a condiment from the connecting position of said two heating boxes  11 . The condiment box  29  can be installed at the connecting space of the two heating boxes  11 , and an oil collecting box  18  is disposed proximate to an end of said axle  15 , and the height of the oil collecting box  18  does not exceed the bottom of the cooking utensil  3  for facilitating an oil collection; and a bracket  181  is disposed on one side of the oil collecting box  18  for latching a wall of the heating box  11  and preventing the oil collecting box  18  from shaking. 
   Referring to  FIGS. 10 and 11 , the cooking apparatus  3  could be a grill  37  for cooking steaks or an iron plate for teppanyaki so as to maximize the cooking function. 
   Referring to  FIG. 12 , the two heating boxes  11  can be combined for clamping and cooking a hamburger  39 , or the axle  15  disposed between the two heating boxes  11  can be adjusted as shown in  FIGS. 12 and 12A ; wherein a positioning point  152  is disposed separately on both ends of an adjusting gap  151  for latching the axle  15  to the positioning point  152  on the corresponding external side, such that a space is maintained for clamping and cooking a hamburger  39  when the two heating boxes  11  are combined with each other. 
   Referring to  FIGS. 2 and 13 , the present invention comprises another simple foldable chassis  2   a , and the chassis  2  has two symmetric support rods  21   a , and the two support rods  21   a  are connected by an axle  22   a , and the two support rods  21   a  have a strong footer  23   a  underneath. When the support rods  21   a  are spread open, the support rods  21   a  having a protruded pillar  24   a  is installed in a corresponding concave hole  19  under the cooker  1 , such that the protruded pillar  24   a  is propped and fixed into the concave hole  19 , and the footers  23   a  provide the required support. 
   The description and its accompanied drawings are used for describing preferred embodiments of the present invention, and it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.