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. 11, 2012
Filed:
Jul. 30, 2009
Yoshio Iimura, Ibaraki, JP;
Hiroaki Orikasa, Ibaraki, JP;
Mitsuhiro Sunaoshi, Ibaraki, JP;
Toshiaki Uchida, Ibaraki, JP;
Kazuhiro Segawa, Ibaraki, JP;
Yoshio Iimura, Ibaraki, JP;
Hiroaki Orikasa, Ibaraki, JP;
Mitsuhiro Sunaoshi, Ibaraki, JP;
Toshiaki Uchida, Ibaraki, JP;
Kazuhiro Segawa, Ibaraki, JP;
Hitachi Koki Co., Ltd., Tokyo, JP;
Abstract
An air compressor includes: a tank portion for reserving compressed air used in a pneumatic tool; a compressed air generation portion for generating compressed air and supplying the compressed air to the tank portion; a drive portion including a motor for driving the compressed air generation portion; a control circuit portion for controlling the drive portion; and a pressure sensor for detecting pressure of the compressed air reserved in the tank portion. The control circuit portion includes a unit for controlling the rotational speed of the motor multistageously based on a detection signal output from the pressure sensor.