Maurice Louis Tabickman
Engineers at Signature Dr, Hanover Park, IL
License number
Colorado 11702
Issued Date
Feb 17, 1973
Renew Date
Apr 2, 1983
Expiration Date
Apr 2, 1983
Type
Professional Engineer
Address
Address
232 Signature Dr, Hanover Park, IL 60108
Professional information
Game Racket
US Patent:
4192505, Mar 11, 1980
Filed:
Nov 7, 1977
Appl. No.:
5/848940
Inventors:
Maurice L. Tabickman - Bloomingdale IL
Douglas E. Dempsey - Palatine IL
Douglas E. Dempsey - Palatine IL
Assignee:
Pepsico, Inc. - Purchase NY
International Classification:
A63B 4910
US Classification:
273 73C
Abstract:
A game racket frame such as a tennis racket frame having controlled stiffness properties and light weight making it possible to selectively add weight to the racket at the region in which such weight will do the most good, namely, along the transverse axis of the stringing area. The racket frame itself comprises an integral structure including a head portion, a throat portion and a handle portion, the structure being composed of high modulus fibers such as graphite, glass, boron or the like, in a matrix of a synthetic resin. The frame has a non-uniform cross-sectional configuration and a taper whereby the thickness of the handle portion is greater than the thickness in the head portion, and the thickness of the throat is intermediate that of the handle portion and the head portion. The frame is such as to provide a tapered beam with the greatest area moment of inertia where the bending moments are highest. A tennis racket utilizing the improved frame has an improved coefficient of restitution at high velocity impact, improved ball rebound characteristics for off-center hits and relatively low vibration transmissibility.