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. 02, 2010
Filed:
Nov. 25, 2005
Akiyoshi Horikawa, Tokyo, JP;
Naoki Minowa, Tokyo, JP;
Hiroshi Yoshida, Tokyo, JP;
Mitsuo Noda, Ichinomiya, JP;
Akiyoshi Horikawa, Tokyo, JP;
Naoki Minowa, Tokyo, JP;
Hiroshi Yoshida, Tokyo, JP;
Mitsuo Noda, Ichinomiya, JP;
Howa Machinery, Ltd., Kiyosu-Shi, JP;
Koganei Corporation, Tokyo, JP;
Abstract
A pair of cylinder holesare formed in a cylinder tubein the axial direction, a slitis formed between these cylinder holes, and an iron plateis inserted in the slit covering the whole range of the movement of the pistonsin the cylinder holes. Spacersmade of a synthetic resin are interposed on both sides of the iron plateto reliably hold the iron platein the slit. The iron platedisposed between the cylinder holes works to decrease the repulsive force acting between the inner magnetsof the pistons and produce an attracting force between the iron plateand the inner magnets, and a contact surface pressure between the wear ringsof the pistonsand the wall surfaces of the cylinder holescan be adjusted to a suitable value.