Patent · US Active

Automatic transmission

US8376898B2 · kind B2 · utility

0Cited by

9References

8Claims

0Family size

Assignee

JATCO LTD · JP

Inventors

Akihiro Yamamoto · Suita, JP
Kazuaki Aota · Sagamihara, JP
Yukiyoshi Inuta · Yokohama, JP
Naoki Kobayashi · Tokyo, JP
Kouichi Iizuka · Fuji, JP
Takayuki Okuda · Atsugi, JP
Peter Tenberge · Friedrichshafen, DE
Joerg Mueller · Chemnitz, DE
Rico Resch · Freital, DE

Key dates

Filing date	Jul 30, 2010
Grant date	Feb 19, 2013
Priority date	—
Expiry date	Feb 5, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2200/2048
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

An automatic transmission comprising: a first planetary gearset of a double pinion; a second planetary gearset of a single pinion; a third planetary gearset of the single pinion, first sun gear and second sun gear being at all times linked together to constitute a first rotary member and second ring gear and third sun gear being at all times linked together to constitute a second rotary member; an input shaft; an output shaft; a first frictional element; a second frictional element; a third frictional element; a fourth frictional element; a fifth frictional element; a sixth frictional element, the six frictional elements being appropriately released or engaged to make a gear shift to a gear shift stage of at least eight forward speeds and, from among the six frictional elements, a combination of simultaneous engagements of three frictional elements achieving at least eight forward speed and one reverse speed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.