초록 ▼

A football fabricated of a specific injection molded thermoplastic polyester elastomer is described. A tethered football practice kicking aid, comprised of a tether, stakes and the described football with holes therein through which the tether is passed is also described. The injection molded thermo

A football fabricated of a specific injection molded thermoplastic polyester elastomer is described. A tethered football practice kicking aid, comprised of a tether, stakes and the described football with holes therein through which the tether is passed is also described. The injection molded thermoplastic polyester elastomer has a flexural modulus of 117 MPa [17,000 psi], a nominal durometer hardness of 470, a melt flow rate of 5.5 g/min., a melting point at peak of endotherm of 208°C. and at the extrapolated end point of 225°C., a compression set after 22 hours at 70°C. [158°F.]2.8 MPa [400 psi]load of 2 and a specific gravity of 2.

대표청구항 ▼

In a football device for kicking practice comprising (1) a football of regulation size and weight and (2) tether means for said football comprising two spaced apart stakes and two segments of rope of relatively equal length connecting said stakes with said football, said segments of the rope extendi

In a football device for kicking practice comprising (1) a football of regulation size and weight and (2) tether means for said football comprising two spaced apart stakes and two segments of rope of relatively equal length connecting said stakes with said football, said segments of the rope extending outwardly from opposed sides of the football and being oppositely spaced apart, the improvement comprising using as said football, a football fabricated from injection molded thermoplastic polyester elastomer having a flexural modulus of about 117 MPa, a nominal durometer hardness of about 470, a melt flow rate of about 5.5 g/min., melting point at peak of endotherm of about 208°C. and at the extrapolated end point of about 225°C., a compression set after 22 hours at 70°C., 2.8 MPa load of about 2 and a specific gravity of about 2; said football having two opposing openings through which a rope is passed; said rope, after passing through said holes, forming said two segments of rope of relatively equal length extending outwardly from said football and connecting said stakes with said football.