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:
Jan. 26, 1988
Filed:
May. 12, 1986
Tetsuaki Hayashi, Osaka, JP;
Hiroshi Itatani, Sakai, JP;
Niro Bando, Sakai, JP;
Mikio Yuki, Sakai, JP;
Nobuyuki Yamashita, Sakai, JP;
Hiroyuki Ogasawara, Izumi, JP;
Mitsuaki Miyata, Sakai, JP;
Kazuaki Kurohara, Sakai, JP;
Fumihiro Ikeda, Osaka, JP;
Yutaka Nakata, Sakai, JP;
Kubota, Ltd., Osaka, JP;
Abstract
A drive transmission structure for a tractor comprising a belt drive system for transmitting power from an engine output shaft to a transmission having a brake mechanism. The belt drive system includes a belt type stepless change speed mechanism having a split pulley assembly and a swing device for swinging the split pulley assembly toward the engine output shaft and the transmission, a first belt for transmitting the power from the engine output shaft to the split pulley assembly, and a second belt for transmitting the power from the split pulley assembly to the transmission. The pulley assembly defines two split pulley sections for engaging the first and second belts, respectively. A control device is provided to change power transmission ratios by actuating the swing device. Further, a tension pulley type clutch mechanism is provided to act on the first belt or the second belt. The brake mechanism and the tension pulley type clutch mechanism are controlled by the clutch and brake control mechanism.