US 7,578,065 B2
Devices for determining the string tension of racket strings
Adolf Brunner, Ennsweg 35, A-5550 Radstadt (Austria)
Filed on May 16, 2007, as Appl. No. 11/804,281.
Claims priority of application No. 06010024 (EP), filed on May 16, 2006.
Prior Publication US 2007/0296207 A1, Dec. 27, 2007
Int. Cl. A63B 51/00 (2006.01); A63B 59/00 (2006.01); G06C 3/00 (2006.01)
U.S. Cl. 33—1SD  [235/88 G; 473/553] 6 Claims
OG exemplary drawing
 
1. A device for determining the string tension of racket strings comprising:
a body having a front surface indicating different combinations of player and racket characteristics, windows corresponding to certain types of rackets, and an axis perpendicular to the front surface; and
a rotary disc which is rotatably situated on the axis behind the front surface and which has numbers indicated thereon representing racket string tension values that can be viewed through the windows for the different combinations of player and racket characteristics.