Golf green slope indicator

Abstract

A golf green slope indicator includes a circular base having a concave upper surface and a lower flat surface, where a slope from a middle of the concave upper surface increases nonlinearly to a periphery of the circular base. The indicator also includes an annular sidewall extending upwards from a periphery of the lower flat surface upwards beyond the concave upper surface, a transparent cover engaging an upper periphery surface of the annular sidewall, and a ball bearing unsecured and configured to roll along the concave upper surface.

1 . A golf green slope indicator, the indicator comprising:
 a circular base having a concave upper surface and a lower flat surface, wherein a slope from a middle region of the concave upper surface increases nonlinearly to a periphery of the circular base;   an annular sidewall extending upwards from a periphery of the lower flat surface upwards beyond the concave upper surface;   a transparent cover engaging an upper periphery surface of the annular sidewall; and   a ball bearing unsecured and configured to roll along the concave upper surface.   
     
     
         2 . The golf green slope indicator of  claim 1 , further comprising an alignment stripe disposed on the transparent cover and passes from an edge of the circular base over a middle region of the concave upper surface to an opposing edge of the base. 
     
     
         3 . The golf green slope indicator of  claim 2 , wherein the alignment stripe is configured as a guide for a golfer to place the golf green slope indicator in an orientation to provide an accurate reading of a golf green slope. 
     
     
         4 . The golf green slope indicator of  claim 2 , wherein the concave upper surface further comprising indicia of a plurality of concentric rings configured to be used by a golfer to provide a visual indication of the slope of a golf green by which concentric ring the ball bearing is nearest when the golf green slope indicator is placed on the golf green. 
     
     
         5 . The golf green slope indicator of  claim 4 , wherein an inner most ring of the plurality of concentric rings indicates the slope of 1%, and the second inner most ring indicates a slope of 1.5%. 
     
     
         6 . The golf green slope of  claim 4 , wherein each concentric ring of the plurality of concentric rings are evenly spaced from each successive concentric ring. 
     
     
         7 . The golf green slope of  claim 4 , wherein a spacing between each concentric ring decreases from an innermost concentric ring to an outermost concentric ring. 
     
     
         8 . The golf green slope of  claim 4 , wherein the concave upper surface is parabolic in shape and the slope of the golf green is calculated using a length that the ball bearing travels relative to a height that the ball bearing travels away from the middle region of the concave upper surface. 
     
     
         9 . A golf green slope indicator, the indicator comprising:
 a circular base having a concave upper surface and a lower flat surface, the concave upper surface being parabolic in shape;   an annular sidewall extending upwards from a periphery of the lower flat surface upwards beyond the concave upper surface;   a transparent cover engaging an upper periphery surface of the annular sidewall;   a ball bearing unsecured and configured to roll along the concave upper surface, the concave upper surface configured to determine a slope of a golf green by a length that the ball bearing travels relative to a height that the ball bearing travels away from the middle region of the concave upper surface; and   an alignment stripe disposed on the transparent cover and passes from an edge of the circular base over a middle region of the concave upper surface to an opposing edge of the base, wherein the alignment stripe is configured as a guide for a golfer to place the golf green slope indicator in an orientation to provide an accurate reading of a direction of the slope of the golf green.   
     
     
         10 . The golf green slope of  claim 9 , wherein each concentric ring of the plurality of concentric rings are evenly spaced from each successive concentric ring.