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:
Jan. 21, 2014
Filed:
Apr. 22, 2010
Tomohiro Naruse, Hitachinaka, JP;
Tetsuya Kuwano, Tsuchiura, JP;
Taiji Hashimoto, Tsuchiura, JP;
Haruo Miura, Kasumigaura, JP;
Mitsuhiro Narita, Tsuchiura, JP;
Tomohiro Naruse, Hitachinaka, JP;
Tetsuya Kuwano, Tsuchiura, JP;
Taiji Hashimoto, Tsuchiura, JP;
Haruo Miura, Kasumigaura, JP;
Mitsuhiro Narita, Tsuchiura, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Size reduction of a barrel-type casing using a shear key is aimed for while ensuring a necessary area of a head cover end surface. A shoulder is formed on the axially outer side of the outer circumferential surface of a head cover. The inner surface of a casing is provided with a circumferentially extending groove. Shear key structure includes a first shear key member disposed in the shoulder and the groove, such that at least a portion of its outer circumferential surface is in contact with the inner circumferential surface of the groove, and a second shear key member disposed adjacent to the first shear key member in the groove, the second shear key member having an axially projecting shoulder, its outer circumferential surface being in contact with an inner circumferential surface of the casing. The first and second shear key members are circumferentially segmented respectively into three or more members, and each member is radially fixed to the casing but not axially fastened to each other, to allow slight displacement between the first and second shear key members by a shear force.