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. 04, 2003
Filed:
Jul. 30, 2001
Applicant:
Inventors:
Shigekazu Nagai, Tokyo, JP;
Masayoshi Yamamoto, Koshigaya, JP;
Assignee:
SMC Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B25J 1/506 ;
U.S. Cl.
CPC ...
B25J 1/506 ;
Abstract
A skirt section has a plurality of substantially elliptic projections and a recessed portion formed on an attracting surface thereof. The skirt section is separated from each other by predetermined spacing distances along a circumferential direction of the skirt section on concentric circles. The recessed portion enables a fluid under the negative pressure to be supplied to the entire attracting surface except for the projections. Even if oil film or water droplet adheres to an attracted surface of a workpiece, the workpiece can reliably be attracted without causing a slip.