Flying disc

Abstract

The invention relates to a flying disc constituted as a disc with a first and a second side. The second side has a central portion that is concave and the central portion is surrounded by an innermost rim ( 2 ) and an outermost rim ( 1 ) extending to the disc's periphery. The innermost rim ( 2 ) is separated from the outermost rim ( 1 ) by a circularly symmetrical depression ( 3 ). This depression gives the disc superior aero dynamical properties, allowing it to glide further in the air than corresponding prior art discs. In one embodiment, the face of the outermost rim ( 1 ) nearest the centre of the disc extends essentially in parallel to the centre axis of the disc. This makes it particularly easy to grasp the disc and facilitates throwing the disc. In another embodiment, the concave central portion of the second side extends along a virtual concave surface to the innermost rim, where the virtual concave surface further extends essentially to the part of the outer rim that extend the furthest from the first side of the disc. This further optimizes the aero dynamical properties of the disc. Typically, the outermost rim ( 1 ) has a face on the second side of the disc, which is concave, and the first side of the disc is convex.

1 . A flying disc constituted as an essentially circularly symmetrical disc with a first and a second side, where the second side has a central portion that is concave and where the central portion is surrounded by an innermost rim ( 2 ) and an outermost rim ( 1 ) extending to the disc's periphery, characterised in that the innermost rim ( 2 ) is separated from the outermost rim ( 1 ) by a circularly symmetrical depression ( 3 ). 
     
     
         2 . A flying disc according to  claim 1 , characterised in that the face of the outermost rim ( 1 ) nearest the centre of the disc extends essentially in parallel to the centre axis of the disc. 
     
     
         3 . A flying disc according to  claim 1 , characterised in that the concave central portion of the second side extends along a virtual concave surface to the innermost rim, where the virtual concave surface further extends essentially to the part of the outer rim that extend the furthest from the first side of the disc.