Combined teaching and practicing apparatus
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a combined teaching and practicing apparatus. 
     2. Discussion of the Prior Art 
     In the disclosure of German Patent 24 51 618, there is illustrated and described in detail a teaching and practicing apparatus for the simulation and practice of dental-clinical work or operating procedures; however, with the apparatus not being suitable for dental-technical work. 
     In contrast with the foregoing publication, the disclosure of German Patent 27 10 756 elucidates the construction of a teaching and practicing apparatus which can only be utilized for dental-technical work procedures. 
     Thus, on the one hand, for dental-clinical work sequences and, on the other hand, for dental-technical work sequences, heretofore there was always required the utilization of two different types of apparatus, which at least required a demand for an increased amount of space in various facilities; for example, in universities. 
     SUMMARY OF THE INVENTION 
     Accordingly, it is an object of the present invention to develop a novel teaching and practicing apparatus which is adapted for an optimized simulation and practice in dental-clinical work or operating procedures, as well as also being adapted for purely dental-technical or technician work and which, in addition thereto, ensures that the apparatus is suited for right-handed as well as left-handed persons, and which affords for an optimum savings in space at uniformly maintained quality in the teaching or educating of the students. 
     The foregoing object is inventively attained through the provision of a combined teaching and practicing apparatus for the simulation and practice of dental-clinical operating procedures and for the implementation of dental-technical or technician work steps. 
     The advantages of this invention reside in that only a single apparatus is necessary for both teaching purposes, and as a result thereof, a considerable amount of space is saved without reducing the quality in teaching. The range of applicability of the apparatus is improved, the apparatus is equally well adapted for use by right-handed and left-handed persons, and through the suitable positioning or placement of the part of the apparatus employed for the dental-clinical operating procedures, there is ensured a teaching which practically simulates reality, as well as a considerable savings in space in both positions of use and non-use. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Further embodiments and advantages of the invention may now be more readily ascertained from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings; in which: 
     FIG. 1 illustrates a front elevational view of the assembled inventive apparatus; 
     FIG. 2 illustrates a view of the stationary apparatus adapted for dental-technical work; 
     FIG. 3a illustrates the movable or displaceable apparatus for dental-clinical operating procedures, as shown in a side elevational view; 
     FIG. 3b illustrates the apparatus of FIG. 3a shown in a front view; 
     FIG. 3c illustrates the apparatus of FIG. 3a shown in a top plan view; 
     FIG. 4 illustrates the apparatus of FIG. 3a with attached phantom or simulated head shown in three positions thereof; 
     FIG. 5a illustrates the lower portion of the apparatus of FIG. 2 as shown in side view; 
     FIG. 5b illustrates the lower portion pursuant to FIG. 5a as shown in a front view; and FIG. 6 illustrates, in four variations, the adjustability and displaceability of the movable apparatus for the dental-clinical operating procedures with regard to the stationary apparatus for the dental-technical work steps. 
    
    
     DETAILED DESCRIPTION 
     Referring in particular to FIG. 1, the subject matter of the invention essentially resides in a combination 1 consisting of a movable or displaceable dental teaching and practicing apparatus 2 for the simulation of dental operating procedures, and in a stationary or positionally fixed dental-technical or technicians teaching and practicing apparatus 3 for dental-technical work sequences. The stationary apparatus 3 supports, on a work plate or surface 17 thereof, an illuminating device 4, a bunsen burner 5, a suctioning hood or aspirator 6; and carries on its framework an air blower 8 and a electric motor 9 for the drive of different dental-technical worktools or implements. Reference numeral 10 identifies a central foot-pedal control arrangement for controlling the various dental instruments which are present in the apparatus 2. 
     On its upper surface, the movable apparatus 2 supports, mounted on its surface on a pivot arm 11a, a simulated or phantom head or a phantom bust 11. Arranged therebelow are drawers 13 for the receipt and storage of dental instruments and auxiliary aids; in addition to a sputum or saliva collector and/or a spray-fog aspirating device, which are both identified together by reference numeral 12. In an advantageous manner, the displaceable apparatus can possess a smaller constructional size than the currently known teaching and practicing apparatus for dental-clinical operating procedures. 
     As is indicated in FIGS. 2 and 3, the displaceable apparatus 2, in its position of non-use as shown in FIG. 1, can be positioned beneath the work plate or surface 17 within an open space provided in the stationary apparatus 3. For this purpose, the phantom head 11 can be tilted forward on its pivot arm 11a, so that the overall height of the apparatus 2 becomes lower than that of the open space beneath the work plate 17. In this position it is not only possible to facilitate the positioning of the apparatus 2 within the open space, but to simultaneously protect the mouth opening portion of the phantom head 11. Additionally, the work plate 17 also protects the entirety of the phantom head 11. 
     FIG. 4 illustrates the aspect that the phantom head 11 is able to assume different positions; namely, besides the forwardly tilted position, also operative positions, of which there is illustrated the vertically oriented and the prone positions. The positions are continually adjustable and the pivot arm 11a can be arrested in every position thereof. 
     Adjacent the phantom head 11, there is also arranged a carrier or holder 14 for dental instruments, whereby the carrier is mounted on a pivot arm 14a so as to be pivotable through an angle of at least 180°. This serves the purpose that not only can the movable apparatus 2, as is illustrated in FIG. 6, be brought into a suitable position, in accordance with the condition of space; but also the carrier 14 can be adjusted in such a manner that a right-handed person, as well as a left-handed person can find an arrangement which is suitable or comfortable to him. 
     As is illustrated in FIGS. 5a and 5b, the movable apparatus 5 can also be equipped with an adjustment in height, which allows the apparatus to be adjusted in conformance with the body size of the person working therewith. The adjustment in height can be carried out mechanically and/or hydraulically and/or automatically by means of a foot-operated pedal 19, and for this purpose is equipped with a scissors-linkage arrangement 16. The apparatus is continually adjustable and arrestable in position. 
     Pursuant to FIG. 4, the apparatus 2 can have a suctioning connector 15 of an exhaust or aspirating aggregate 18 (FIG. 1) for liquid and/or dust connected therewith. 
     In order to improve the displaceability between locations for the movable apparatus 2, there can be mounted rollers 20 either directly on the apparatus or on the scissors linkage arrangement 19, as shown in FIGS. 2, 3a, 4 and 5a. It is also possible to fasten a pair of rollers 20 to the apparatus itself and the other pair of rollers 20 to the scissors linkage arrangement 16, as is illustrated in FIG. 5a. The last-mentioned arrangement allows that even with the scissors linkage arrangement 16 raised, the apparatus 2 can still be moved. Instead of the rollers, there can also be provided skids or the like.