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:
Jun. 22, 1976
Filed:
Mar. 13, 1975
Yoshinobu Murayama, Sakai, JA;
Yashunori Uchibori, Sakai, JA;
Kubota Tekko Kabushiki Kaisha, Osaka, JA;
Abstract
Hydraulic double clutch comprising a tractor-driving clutch unit and a power takeoff clutch unit accommodated in a clutch housing serving also as an oil tank. Hydraulic pumps disposed in the housing have gears respectively meshing with a gear on the drive disk assembly of the double clutch to force the working oil into the clutch units through individual oil passages and to push the pistons of the units. Each of the oil passages is provided with a poppet valve at an intermediate portion thereof. The poppet valves are opened or closed to disengage or engage the clutch units independently of each other for interruption or transmission of the torque of engine. Each of the valves is automatically opened when the pressure on the piston builds up to excess and is therefore serviceable also as a pressure control valve. The valve is operable to bring the clutch unit into substantially semi-engaged state.