Concave water ski

Claim 1

A SLALOM WATER SKI COMPRISING AN ELONGATED SKI BODY HAVING A REARWARD END, AN ELONGATED RUNNING PORTION, AND A FORWARD UPCURVED TIP PORTION INTEGRALLY FORMED WITH SAID RUNNING PORITON AND JOINING SAID RUNNING PORTION ALONG A LINE EXTENDING TRANSVERSELY OF SAID BODY, SAID BODY HAVING A LOWER WATER ENGAGING SURFACE AND AN UPPER SUPPORT SURFACE DEFINING THE PLAN PROFILE OF SAID BODY WITH SAID BODY CONSISTING ESSENTIALLY OF A PLURALITY OF LAMINAE OF HARDWOOD EXTENDING ALONG THE LENGTH OF THE BODY AND POSITIONED IN SIDE BY SIDE RELATION TO EACH OTHER AND IMPARTING TO SAID BODY SUBSTANTIAL LONGITUDINAL FLEXIBILITY, A SKI BOOT SUPPORT AREA ON SAID UPPER SUPPORT SURFACE POSITIONED AT APPROXIMATELY THE MID-POINT OF THE LENGTH OF SAID RUNNING PORTION, AND A STEP AREA ON THE UPPER SUPPORT SURFACE BETWEEN SAID SKI BOOT SUPPORT AREA AND SAID REARWARD END, SAID PLAN PROFILE BEING SMOOTHLY TAPERED THROUGHOUT THE LENGTH OF SAID BODY WITH ITS AREA OF MAXIMUM WIDTH LOCATED BETWEEN SAID SKI BOOT SUPPORT AREA AND SAID TRANSVERSE LINE AND WITH SAID PROFILE DECREASING IN WIDTH CONTINUOUSLY FROM SAID AREA OF MAXIMUM WIDTH TO A POSITION BETWEEN SAID STEP AREA AND SAID REARWARD END, THE TRANSVERSE CROSS SECTION OF SAID LOWER WATER ENGAGING SURFACE HAVING A FLAT SHAPE FORWARD OF SAID TRANSVERSE LINE AND A CONCAVE SHAPED EXTENDING SUBSTANTIALLY THE FULL WIDTH OF SAID RUNNING PORTION OF THE REAR OF SAID TRANSVERSE LINE WHERE THE RADIUS OF CURVATURE OF SAID CONCAVE SHAPE IS SUBSTANTIALLY CONSTANT ALONG THE ENTIRE LENGTH OF SAID RUNNING PORTION AND IS BETWEEN ABOUT TWO AND FIVE TIMES THE MAXIMUM WIDTH OF SAID BODY.