公开(公告)号：KR100803528B1

公开(公告)日：2008-02-14

申请号：KR1020070017963

申请日：2007-02-22

Applicant: 재단법인서울대학교산학협력재단

Inventor： 최해천 ,  최진 ,  손광민

IPC: A63B37/14 ,  A63B37/12

CPC classification number: A63B37/0007 ,  A63B37/0011

Abstract: A golf ball is provided to make air resistance identical to or smaller than that of a dimple golf ball by forming grooves in a net shape on the surface of a spherical surface thereof. Grooves(20) in a net shape are formed on the spherical body(10) of a golf ball. The area of the grooves is 14 to 69% of the surface area of the golf ball. The width of the groove is 1 to 5mm, and the depth of the groove is 0.1 to 0.5mm. Protrusions having a height that is smaller than the depth of the groove are formed on the groove. The grooves in a net shape are connected to each other or cut off from each other in the middle thereof. The protrusions are connected to each other or are cut off from each other.

Abstract translation: 通过在其球面的表面上形成网状凹槽，提供高尔夫球以使空气阻力等于或小于凹坑高尔夫球的空气阻力。 网状的槽（20）形成在高尔夫球的球体（10）上。 槽的面积为高尔夫球表面积的14〜69％。 槽的宽度为1〜5mm，槽的深度为0.1〜0.5mm。 在凹槽上形成具有小于凹槽深度的高度的突起。 网状凹槽在其中间彼此连接或切断。 突起彼此连接或彼此切断。

公开(公告)号：KR100727634B1

公开(公告)日：2007-06-13

申请号：KR1020050131948

申请日：2005-12-28

Applicant: 재단법인서울대학교산학협력재단

Inventor： 최해천 ,  손광민 ,  문신일

IPC: A63B31/08

Abstract: A swimming fin is provided to reduce user's fatigue by reducing water resistance and to increases propelling force by increasing lift of the swimming fin. The swimming fin includes a shoe portion(10) and a pin portion(20). A first protruding portion(21) is formed on a center portion of any one of upper and lower surfaces of the pin portion(20) to extend in a longitudinal direction of the pin portion. At least a couple of second protruding portions(221,222) are formed to extend in a longitudinal direction of the pin portion(20). The space between the first and second protruding portions(21,221,222) gets narrower as it goes away from the shoe portion(10).

Abstract translation: 提供游泳鳍片以通过减少防水性来减轻使用者的疲劳，并通过增加游泳鳍片的升力来增加推进力。 游泳鳍片包括鞋子部分（10）和销部分（20）。 第一突出部分（21）形成在销部分（20）的上表面和下表面中的任一个的中心部分上，以在销部分的纵向方向上延伸。 至少一对第二突出部分（221,222）形成为在销部分（20）的纵向方向上延伸。 第一和第二突出部分（21,221,222）之间的空间随着远离鞋部（10）而变窄。