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. 26, 2007
Filed:
Jan. 24, 2006
Osamu Nakakita, Kanagawa-ken, JP;
Yoshimi Okazaki, Kanagawa-ken, JP;
Masayuki Morimoto, Hyogo-ken, JP;
Takao Sakurai, Aichi-ken, JP;
Teruo Mizuno, Kanagawa-ken, JP;
Osamu Nakakita, Kanagawa-ken, JP;
Yoshimi Okazaki, Kanagawa-ken, JP;
Masayuki Morimoto, Hyogo-ken, JP;
Takao Sakurai, Aichi-ken, JP;
Teruo Mizuno, Kanagawa-ken, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A forklift having a cargo apparatus, the responsiveness of which to the operation by a user is improved. The forklift has: a DSP which generates a frequency instruction f* in response to the operation to a cargo apparatus operation lever, a voltage instruction V* from the frequency instruction f* by using the VVVF control, inverter control signals from the voltage instruction v*; an inverter which generates the three-phase electric power in response to the inverter control signal; a hydraulic pump; an induction motor driving a hydraulic pump by using the three-phase electric power; and a cargo apparatus which is driven by the hydraulic pressure supplied from the hydraulic pump.