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. 01, 2008
Filed:
Aug. 28, 2006
Teruo Imai, Ibaraki, JP;
Taiichi Kumasaka, Ibaraki, JP;
Hideki Watanabe, Ibaraki, JP;
Shinki Otsu, Ibaraki, JP;
Yoshiichi Komazaki, Ibaraki, JP;
Teruo Imai, Ibaraki, JP;
Taiichi Kumasaka, Ibaraki, JP;
Hideki Watanabe, Ibaraki, JP;
Shinki Otsu, Ibaraki, JP;
Yoshiichi Komazaki, Ibaraki, JP;
Hitachi Koki Co., Ltd., Tokyo, JP;
Abstract
An outer peripheral surface of a cam has an apex disposed of distance from a rotational axis, a first region adjacent the apex opposite to the direction of rotation that increases in distance from the rotational axis during rotation, and a second region adjacent the apex in the rotational direction that decreases in distance from the rotational axis of the cam with the rotation thereof. The apex is disposed where the phase θ thereof advances by 15 degrees and 55 degrees or less in the rotational direction from a position symmetrical to the rotational axis. The rate of change between the second region and the rotational axis is greater than the rate of change between the first region and the rotational axis. A retreat amount X when a saw blade reaches an uppermost point c from a foremost point is set to 0.8 mm.