Machine element or mechanism – Gearing – Toothed gear and recirculated unconnected elements
Patent
1975-02-28
1976-11-23
Gerin, Leonard H.
Machine element or mechanism
Gearing
Toothed gear and recirculated unconnected elements
74237, F16G 500, F16G 122, F16G 510
Patent
active
039929590
ABSTRACT:
A tension resistant structure for driving belts and driving belts containing the tension resistant structure are provided. The tensioning structure comprises laterally spaced cords which extend substantially parallel to the longitudinal axis of the belt, the cords contain only seven threads of the polyamide, polyester or rayon with at least six of the threads being helically twisted together and disposed concentrically about the longitudinal axis of the cord, the physical characteristics of the cords are such that p (1 + K) = Rd wherein p is the pitch of the spiral of each thread; d is the diameter of the thread; R is between 27.4 and 35.1 and K is 0 to 0.03 when the thread is rayon; 0.01 to 0.07 if the thread is polyester; and 0.01 to 0.1 if the thread is polyamide.
REFERENCES:
patent: 1256011 (1918-02-01), Gammeter
patent: 2404271 (1946-07-01), Brunner
patent: 2770977 (1956-11-01), Beckadolph et al.
patent: 3068710 (1962-12-01), Beckadolph et al.
patent: 3117460 (1964-01-01), Traeger
patent: 3479892 (1969-11-01), Cicognani
Gerin Leonard H.
Industrie Pirelli S.p.A.
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