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. 02, 2007
Filed:
Feb. 01, 2006
Takashi Matsui, Saitama-ken, JP;
Masaki Moronuki, Niigata-ken, JP;
Katsuhiro Tsuji, Niigata-ken, JP;
Yutaka Mabuchi, Kanagawa, JP;
Takahiro Hamada, Kanagawa, JP;
Hiroyuki Izumi, Kanagawa, JP;
Tomoyuki Koike, Tokyo, JP;
Takashi Matsui, Saitama-ken, JP;
Masaki Moronuki, Niigata-ken, JP;
Katsuhiro Tsuji, Niigata-ken, JP;
Yutaka Mabuchi, Kanagawa, JP;
Takahiro Hamada, Kanagawa, JP;
Hiroyuki Izumi, Kanagawa, JP;
Tomoyuki Koike, Tokyo, JP;
Kabushiki Kaisha Riken, Tokyo, JP;
Nissan Motor Co., Ltd., Kanagawa-ken, JP;
Abstract
A valve lifter, in which an amorphous hard carbon film is coated at least on the surface that slides against a cam, is characterized in that the surface of a base material (substrate) has an arithmetic mean roughness of Ra 0.01 to 0.03 micrometers, and the maximum length of the scratch on the base surface is made to be equal to or shorter than 250 micrometers.