The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 1992
Filed:
Apr. 12, 1991
Satoshi Kawai, Sakurai, JP;
Shuzo Hirakushi, Uda, JP;
Akihiko Kawano, Kashiwara, JP;
Hideki Hagashira, Ikoma, JP;
Koyo Seiko Co., Ltd., Osaka, JP;
Abstract
A power transmission apparatus for vehicles for transmitting a driving force by coupling an input shaft and an output shaft of a hydraulic pump to respective driving shafts of front and rear wheels of a four-wheel drive vehicle, wherein a throttle member which is located on the axis of a rotor and a casing interlocking respectively with the input and output shafts, rotated with interlocking with one of the rotor and casing and disposed movably along the axis to change the hydraulic fluid discharge passage area of the hydraulic pump responsive to its movement, and a driving unit which includes a magnetic member coupled coaxially to the throttle member and a coil installed around the magnetic member and supported nonrotatably, and moves the throttle member by movement of the magnetic member in connection with excitation of the coil are provided.