Abstract:
A toy utilizes a resilient elastic impeller to spin and propel a circular disk having aerodynamic characteristics whereby the user can easily control the path of flight of the circular disk in the atmosphere. The impeller is engaged in a slot in the periphery of the disk which secures the impeller as the impeller is flexed by the application of opposing force by the user. When the force is released on the disk, the disk is spun and propelled forward by the deflexing of the impeller.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates to devices which are used for amusement and self-entertainment. 
     2. The Prior Art 
     The use of an aerodynamic circular disk has been popularized by the &#34;Frisbee&#34;. The use in the past has involved a propelling force supplied through a throwing action by the user. What was once a simple toy for throwing has developed as well into an intense sport where teams now compete on a national basis. 
     SUMMARY OF THE INVENTION 
     In accordance with this invention a circular disk is formed with its outer periphery surface convexed forming an airfoil. The peripheral edge is slotted to provide for the engagement of a resilient impeller. With the impeller so engaged in the peripheral slot, equal and opposing coupling forces are applied by the user to the unsecured end of the impeller and the periphery of the disk opposite the engaged slot respectively. The impeller is thereby flexed. Upon the release of the coupling force on the disk, the disk is spun and propelled into the atmosphere by the deflexing of the impeller. As the atmosphere passes over the top surface of the disk an aerodynamic lift is created. When forward movement of the disk is slowed by the resistance of the atmosphere, the effect of the gravitational force on the disk is retarded by the entrapment of the atmosphere under the disk. 
     This invention relates to toys and as such provides recreation and self-entertainment. It is simple and inexpensive. The disk can be formed into the appearance of a number of generic objects such as a tire or a hamburger and thereby be used in commercial promotional programs. This invention is a major improvement over the conventional &#34;Frisbee&#34; in that by providing for use with a resilient impeller, the user need only exercise a minimum amount of skill and dexterity. Many are denied the enjoyment of the play involved with using a conventional &#34;Frisbee&#34; because of the high degree of manual skill and coordination required. By supplying the propelling force through a resilient impeller, the level of skill and coordination required to obtain the desired control over the flight path is significantly reduced. Therefore, even a young child can receive satisfaction from the play with the toy of this invention. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of the disk and impeller utilizing the principles of the invention. 
     FIG. 2 is a top view of the disk showing one configuration of the engaging slot. 
     FIG. 3 are cross-sectional views through the disk and through the slotted portion of the disk. 
     FIG. 4 is a detail showing the relationship of one form of a flexed impeller engaged in one form of slot. 
     FIG. 5 is a detail showing the relationship of another form of flexed impeller engaged in another form of a slot. 
     FIG. 6 is a detail showing the relationship of another form of a flexed impeller engaged into yet another form of a slot. 
     FIG. 7 is a view of the bottom of another form of the disk and notch. 
     FIG. 8 is a cross-section view through the disk as shown in FIG. 7. 
     FIG. 9 is the plan view of another form of the impeller. This impeller, as shown, can be inserted into and carried by the disk shown in FIG. 7 and FIG. 8. 
     FIG. 10 is the side view of the impeller shown by FIG. 9. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to the drawings, a disk is shown generally at 10 and can be made of any suitable material. The leading edge of the disk 12, and similarly extending around the entire periphery, is convexed shaped forming an airfoil. The disk has a sufficiently thin cross-section so that an entrapping space 13 is formed on the underside of the disk. 
     The impeller is shown generally at 11 and can be a generally rectangular body member made of any resilient material such as a plastic or metal. For child safety purposes the impeller 11 must be at least 1 by 21/4 inches, and has top and bottom edges 11a and 11b. The crosssectional thick of the impeller will depend on its length and the modulus of elasticity of the material chosen. The opposite ends of the impeller are beaded as at 11c and 11d, respectively. 
     The slot must be sufficiently deep to insure that when the impeller is engaged and flexed by the user applying equal and opposing coupling forces to the unengaged end of the impeller and the periphery of the disk opposite the engaged slot, the impeller remains in position. 
     The sides of the slot 15 are axially converging so that the dimension of the slot is greater at the periphery than at the base of the slot 16. The function of these angled sides is to allow the disk to freely slide away from the impeller when the disk is released and is spun and propelled forward by the deflexing of the impeller. 
     The engaging end of the impeller and the slot configuration can take a number of forms. FIG. 4 shows disk 10 and impeller 11 in which the slot depth to width ratio must exceed 2 and the impeller is uniform in cross-section with the end 17 having radius corners. The ratio of the impeller cross-section to the slot width at the periphery must exceed 2 while the ratio of the cross-section to the slot width at the base of the slot must exceed 1.3. Using this slot and impeller configuration the toy may be operated either right or left handed by the user. 
     FIG. 5 shows another slot configuration 14a in the disk and impeller 11. Each of the beaded portions of the impeller may comprise an enlarged round protrusion 11c, 11d on the end of the impeller and an enlarged area 19 in the base of the slot the flexed impeller is confined by the interference of the offset 20 on the impeller and the relief 21 in the side edge of the slot. Because of the locking action the depth to width ratio of the slot need not be as great as that shown in FIG. 4. The slot width to impeller cross-section may also be greater to provide more clearance for the impeller when the disk is released and thereby spun and impelled forward by the deflexing impeller. Using this configuration the toy may be operated right or left handed by the user. 
     FIG. 6 shows yet another configuration of the slot 14b in the disk with impeller 11. In this design the locking action between the slot relief 21a and the impeller offset 20 on the partial bead 11e is limited to a single hand. Therefore, an opposite hand slot must be provided to make the toy operable by either hand. A maximum amount of clearance 22 between the back of the impeller and the back side of the slot is provided thereby allowing for an increase in coupling force to be applied without an interference between the disk and the impeller upon propelling the disk into flight. 
     FIG. 7 shows a disk 10 with slot 14c having the side walls 23 gradually converging inwardly toward an enlarged area 24 defined by opposing radius sides 25 and a flat bottom 26. The intersection of the converging side walls and the radius side of the enlarged area defines a relief point 21b. FIG. 8 shows that this disk has a reinforcing bead 27 on the inside of the leading edge of the disk extending around the circumference. Slot 26 is reinforced by web 27 which follows the outline of the slot. The cross-sectional thickness of the center portion of the disk 28 gradually thins to a minimum at the center of the disk 29. It will be understood that the outer surface of the center portion 28 forms a display surface 28a which can be provided with decorative, promotional, or advertising indicia as may be desired. 
     FIG. 9 and FIG. 10 show an impeller 30 having its width dimension 31 and length dimension 32 exceeding the 1 by 21/4 inch requirement noted before. As will be evident from the drawings, the configuration of the impeller 30 provides two pairs of exterior points, the distance between the points of each pair being equidistant and being greater than any other edge to edge dimension. This distance is equal to the inner diameter of the disk as measured adjacent to the bead 27. By correspondingly sizing and shaping the impeller 30, the impeller 30 is conveniently snapped behind the bead 27 and is carried by the disk 10 in a stored position as shown in FIG. 9. The impeller and disk can be conveniently stored as an integral unit when the toy is not being used: The impeller is provided with an enlarged finger gripping area 33 at one of the elongated ends. The opposite end has a studdy right angle flange 34 across the full width of that end. The flange has a rounded bottom edge 35. The interior radius 36 formed by the intersection of the impeller body and the flange is at a minimum to enhance the gripping of the relief point 21b when so engaged. 
     The flight path and the place of landing of the disk can be controlled by the user selectively applying the desired amount of coupling force and controlling the altitude of the disk. By tipping the disk so that the left outer edge is lower than the impeller engaged edge, the disk can be caused to take a course of flight to the left of a line perpendicular to the longitudinal axis of the impeller. Likewise, by tipping the disk so that the left outer edge is higher than the impeller engaged edge, the course of flight can be directed to the right of a line perpendicular to the longitudinal axis of the impeller. If the toy is operated in the opposite hand, the similar performance will be obtained. 
     Although various modifications might be suggested by those versed in the art, it should be understood that I wish to embody within the scope of the patent warranted hereon all such modifications as reasonably and properly come within the scope of my contribution to the art.