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:
Apr. 17, 2012
Filed:
Dec. 18, 2007
Isao Hayase, Tsuchiura, JP;
Kenichiro Tokuo, Munich, DE;
Hiroyuki Sakamoto, Hitachinaka, JP;
Itsuro Sawada, Hitachinaka, JP;
Isao Hayase, Tsuchiura, JP;
Kenichiro Tokuo, Munich, DE;
Hiroyuki Sakamoto, Hitachinaka, JP;
Itsuro Sawada, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A linear actuator has an alternating drive apparatus, an alternating motion member, a fixing member fixed to a housing member, a direct acting member, a first wedge joining mechanism incorporated between the alternating motion member and the direct acting member, and a second wedge joining mechanism incorporated between the fixing member and the direct acting member. The first wedge joining mechanism and the second wedge joining mechanism have an inclined surface, a non-inclined surface at a constant distance from the central axis, and a wedge member arranged between the inclined surface and the non-inclined surface. The non-inclined surfaces of the first and second wedge joining mechanisms are formed on the direct acting member. The inclined surface of the first wedge joining mechanism is formed on the alternating motion member, and the inclined surface of the second wedge joining mechanism is formed to the fixing member.