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:
Mar. 10, 2015
Filed:
Sep. 14, 2012
Yasuto Onomichi, Hyogo, JP;
Taku Kondo, Hyogo, JP;
Shogo Hagihara, Hyogo, JP;
Ryo Takaki, Hyogo, JP;
Takaaki Onishi, Hyogo, JP;
Yasuto Onomichi, Hyogo, JP;
Taku Kondo, Hyogo, JP;
Shogo Hagihara, Hyogo, JP;
Ryo Takaki, Hyogo, JP;
Takaaki Onishi, Hyogo, JP;
Sumitomo Precision Products Co., Ltd., Hyogo, JP;
Abstract
A landing gear retraction/extension device includes a hydraulic actuator, a hydraulic circuit, a hydraulic pump, an electric motor, and a driver. Part of the hydraulic circuit is provided such that heat is exchangeable between operation oil and each of the electric motor and the driver. The driver supplies power to the electric motor before landing of an aircraft such that an operation oil temperature is higher than a predetermined temperature upon the landing of the aircraft.