# US 10,870,043 B2 · Golf tee with reduced friction > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,870,043 B2 - Document ID: US10870043B2 - Status: Granted - Kind: B2 - Application number: 16/419,812 - Filed: 2019-05-22 - Published: 2020-11-26 - Granted: 2020-12-22 - Earliest claimed: 2019-05-22 - Applicants: Jack Cooper - Inventors: Jack Cooper - Web page: https://patentgrep.com/patent/US10870043B2 ## CPC - A63B 57/10: Golf tees - A63B 2071/0694: {Visual indication, e.g. Indicia} - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) ## Abstract The present invention pertains to a golf tee comprising a stem portion and a top portion connected to the stem portion, the top portion includes an upper surface that opposes the stem and having a convex shape, free of an adhesive layer or material that anchors the ball on the upper surface against uneven ground. The golf tee minimizes friction and other impeding forces between the tee and the ball by reducing an area of contact between the tee and the ball, while preventing the player from installing the golf tee other than vertically into the ground, or horizontal to the Earth's surface, thereby preventing the golf player from having to alter his or her posture and stroke according to the mounting of the ball. ## Claims ### Claim 1 A golf tee for supporting a golf ball above a ground, comprising: a stem portion; and a top portion connected to the stem portion, the top portion including an upper surface opposing the stem portion, the upper surface is convex throughout the upper surface, the upper surface having a front edge that opposes a back edge, such that the front edge is spaced apart from the back edge by a length of the upper surface, the upper surface further including a convex center point at an apex of the upper convex surface, the convex center point is arranged between the front and back edges, such that the upper surface is free of an adhesive material or material that anchors the golf ball against uneven ground, wherein the stem portion has a proximal end that is pointed and an opposite and a distal end that connects to the top portion; the top portion comprises an edge portion arranged between a lower surface and the upper surface, the top portion having a length and a width, wherein the length is at least 1.5 times the width; and the golf tee further comprising a pair of rails arranged on the upper surface of the top portion, wherein the rails extend in a direction parallel to the length of the upper surface, and are arranged in between the convex center point and the front edge and extend from near the convex center point to near the front edge, such that when the stem portion is inserted into the ground in a vertical manner aligned with gravity or is horizontal to the Earth's surface, the golf ball stably rests on the convex center point of the upper surface. ### Claim 2 (depends on 1) The golf tee of claim 1, the stem portion and the top portion being a single integrated monolithic unit. ### Claim 3 (depends on 1) The golf tee of claim 1, wherein the width of the top portion is greater than the diameter of the golf ball and is no more than 3 inches. ### Claim 4 (depends on 1) The golf tee of claim 1, the rails being parallel to each other. ### Claim 5 (depends on 3) The golf tee of claim 3, the rails converging towards the front edge. ### Claim 6 (depends on 4) The golf tee of claim 4, wherein the rails are removable from the upper surface of the top portion by interference fit, camming or a screw and bolt combination. ### Claim 7 (depends on 1) The golf tee of claim 1, further comprising a backstop arranged on the upper surface of the top portion and away from the convex center point of the top convex surface by a distance that is less than a radius of the golf ball. ### Claim 8 (depends on 7) The golf tee of claim 7, wherein the backstop is parallel to the width of the upper surface and is orthogonal to a pair rails arranged on the upper surface of the top portion. ### Claim 9 (depends on 1) The golf tee of claim 1, wherein a portion of the upper surface about the convex center point is horizontal with gravity, when the stem is inserted into the ground in a vertical manner. ### Claim 10 (depends on 1) The golf tee of claim 1, the stem portion including a plurality of markings between the proximal and the distal ends. ### Claim 11 (depends on 1) The golf tee of claim 1, wherein the rails are inclined with respected to a horizontal in going from the convex center point to the front edge when the stem extends in a vertical manner parallel to gravity. ### Claim 12 A method of using a golf tee, comprising: 1) providing the golf tee that includes a) a stem portion having a pointed proximal end and a distal end opposing the proximal end; and b) a top portion including an upper surface that faces away from the stem, the distal end of the stem portion is attached to the top portion, the upper surface is convex throughout and has a convex center point at an apex, the upper surface is free of adhesive or material that anchors the golf ball against an uneven ground wherein the golf tee further comprising a pair of rails extending from near the center point to near the front edge of the upper surface, the golf ball being guided by the rails after the head contacts the ball; 2) inserting the proximal end of the stem into the ground; 3) placing a golf ball on the convex center point of the convex upper surface; and 4) readjusting an angle of the stem with vertical, such that the convex center point is horizontal to the Earth's surface, to enable the golf ball to stay on the convex center point of the convex upper surface. ### Claim 13 (depends on 12) The method of claim 12, further comprising striking the golf ball by swinging a golf club having a head at the golf ball arranged on the upper convex surface of the tee, the head moving from a back end to a front end of the convex upper surface. ### Claim 14 (depends on 12) The method of claim 12, wherein the stem portion comprises a plurality of markings that circumvent an outer surface of the stem portion, wherein the inserting comprises referring to the markings to determine the depth into the ground the stem portion has been inserted. ### Claim 15 (depends on 12) The method of claim 12, further comprising attaching a pair of rails and a backstop to the top surface of the tee prior to step 2). ### Claim 16 (depends on 12) The method of claim 12, further comprising attaching a pair of rails to the top surface of the tee prior to step 2).