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:
Nov. 13, 2012
Filed:
Jul. 30, 2009
Tetsuya Shimizu, Anjo, JP;
Kenichi Tsuchida, Anjo, JP;
Akitomo Suzuki, Anjo, JP;
Kazunori Ishikawa, Toyota, JP;
Kazuhiko Kato, Anjo, JP;
Tetsuya Shimizu, Anjo, JP;
Kenichi Tsuchida, Anjo, JP;
Akitomo Suzuki, Anjo, JP;
Kazunori Ishikawa, Toyota, JP;
Kazuhiko Kato, Anjo, JP;
Aisin Aw Co., Ltd., Anjo, JP;
Abstract
A drive unit that includes a solenoid device that includes: a solenoid section having a movable portion that abuts on a case to arrive at an initial state when de-energized; a pump section axially sliding in association with a movement of the movable portion by an electromagnetic force of the solenoid section and pumping a hydraulic fluid by reciprocation; and an elastic member biasing the pump section in a direction counter to the electromagnetic force of the solenoid section; and a control unit that controls the solenoid device so that a current applied to the solenoid section is repeatedly increased and decreased between an upper limit value and a lower limit value that is greater than 0.