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:
Aug. 17, 1993
Filed:
Dec. 31, 1991
Michihiro Tanaka, Amagasaki, JP;
Junichi Teruta, Amagasaki, JP;
Hitachi Kiden Kogyo Kabushiki Kaisha, Hyogo, JP;
Abstract
A transporting system includes plural primary dispersedly arranged linear induction motors and plural continuously movable bodies connected by a secondary conductor in an endless path. At least one of the linear induction motors is directly controlled by an inverter control device, and the remaining linear induction motors are switchably connected to a power source. A running speed of the moveable bodies is detected, and the difference between the detected running speed and a desired running speed is used to control the inverter control device and the switching of the remaining induction motors to the power source. A voltage controller can be used in place of the inverter control device.