Title: Overdrive for motor vehicles

Abstract: An overdrive for motor vehicles is disclosed which comprises a planetary carrier joined to an input shaft, a ring gear with internal teeth, said ring gear engaging planet pinions carried on the planet carrier and being joined to an output shaft, and a sun pinion engaging the planet pinions. A one-way clutch is disposed between the housing of the overdrive and the sun pinion and is arranged to lock the sun pinion to the housing when driving torque is transmitted from the input shaft to the output shaft. A second clutch is disposed to lock the sun pinion to the ring gear when engaged, the one-way clutch having a control which cooperates with an operator for the second clutch to suspend the blocking function of the one-way clutch before the second clutch is engaged.

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Inventors: Weiertz, Stig H. A. (Kungalv, SE)
Janiszewski, Grzegorz K. (Goteborg, SE)

Application Number: 837212
Filing Date: 1977-09-27
Publication_date: 1980-09-23
Assignee: AB Volvo (Goteborg, SE)
Primary Class(es): 475/303 192/12B, 192/18R, 475/312
Other Classes:
US Patent Ref:

2518837	Aug, 1950	Taylor	74/781.
2651394	Sep, 1953	Sinclair	74/781.
2654269	Oct, 1953	Wilson	74/781.
2806387	Sep, 1957	Forster et al.	74/781.
2933944	Apr, 1960	Carnagua	74/781.
2946240	Jul, 1960	Kop	74/781.
3182528	May, 1965	Lamburn	74/781.
3618425	Nov, 1971	Wickman	74/781.
3631741	Jan, 1972	Kelbel	74/781.
3682020	Aug, 1972	Scheiter	74/781.

Other Refs: 542771

Jan, 1970	SE.

Primary Examiner: Scott, Samuel
Assistant Examiner: Green, Randall L.
Attorney: Young & Thompson