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:
Mar. 03, 1981
Filed:
Sep. 11, 1979
Yoji Yamada, Kawagoe, JP;
Sadanori Nishimura, Omiya, JP;
Takeyuki Shimizu, Kamifukuoka, JP;
Masakazu Maezono, Omiya, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention discloses a control apparatus for an oil pressure operated transmission in an automotive vehicle. The apparatus comprises a transmission with at least two stages of low speed and high speed forward driving trains and it is so arranged that, in an automatic shift range of a manual valve connected through first oil passage to an oil pressure source, low speed and high speed oil pressure clutches are selectively supplied with pressure oil through a shift valve in communication with the manual valve through a second oil passage. In a hold range of the manual valve, the valve is interposed between the low speed oil pressure clutch and the shift valve means for dividing the oil passage into third oil passage on its upstream side and fourth oil passage on its downstream side, having no communication between third and fourth passage and establishing a communication between fourth and first oil passage without through the shift valve means. At the same time the communication between first and second oil passage is disrupted.