Machine element or mechanism – Gearing – Interchangeably locked
Patent
1991-07-12
1996-05-07
Herrmann, Allan D.
Machine element or mechanism
Gearing
Interchangeably locked
403359, 464160, F16H 308, F16D 310
Patent
active
055135420
ABSTRACT:
An improved vehicle transmission which substantially reduces the noisy rattle normally produced by interengagement of the input shaft and the input drive gear of the transmission when the engine of the vehicle is operating at idle speed and the transmission is in neutral. The input shaft and the input drive gear are in constant driven relationship. In the inventive structure, the interengageable spline teeth of the input shaft and the input drive gear of the transmission are provided with a greater backlash than is normally used. The intermittent firings of the engine normally cause nonsynchronous rotation of the input shaft relative to the input drive gear with attendant engagement of their respective spline teeth. The increased backlash provides greater spacing between the interengaging teeth which substantially eliminates the engagement of the spline teeth and attendant rattle noise.
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SAE Publication titled "Mathematical Model and Computer Simulation of Idle Gear Rattle"; Author: Andrew Szadkowski; pp. 81-97; (Not Dated).
EPO WPIL/Derwent Disclosure--Leningrad Forestry Academy Bul. 16 Apr, 30, 1981.
Bogema Edward J.
Miller Lon C.
Eaton Corporation
Gordon Howard D.
Herrmann Allan D.
Rowe Donald A.
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