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:
Dec. 03, 1985
Filed:
Jan. 27, 1983
Toshio Takano, Hamuramachi, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A system for a four-wheel drive vehicle automatically changes a two-wheel driving system to a four-wheel driving system in accordance with a slipping rate between the wheels. The system is provided with a pressure oil operated clutch for transmitting the power of the engine to auxiliary driving wheels. The clutch is engaged by pressure oil supplied by a pressure oil circuit including a solenoid operated valve. An electric circuit comprising a control device is provided for energizing the solenoid. The control device operates to close the electric circuit in dependency on the slipping rate to energize the solenoid. The energization of the solenoid causes the clutch to engage, so that four-wheel driving power transmission system is established. A manual switch is provided for opening the electric circuit.