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.:

US 8776491 B1

PDF
Full Text
Expired
Date of Patent:
Jul. 15, 2014

Filed:

Dec. 29, 2011
Applicants:

Michio Oitaka, Osaka, JP;

Takahisa Ando, Osaka, JP;

Inventors:

Michio Oitaka, Osaka, JP;

Takahisa Ando, Osaka, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66F 3/00 (2006.01); B66F 3/02 (2006.01); B66F 7/12 (2006.01);
U.S. Cl.
CPC ...
Abstract

There is provided a lifting engagement chain unit that autonomously erects a pair of engagement chains, ensures engagement accuracy between link plates and improves buckling strength. A plurality of buckling restricting attachment plates is arrayed along an outer surface of the engagement chains in a chain longitudinal direction.


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Oitaka, Michio. (2014). Lifting engagement chain unit (U.S. Patent No. 8776491). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8776491

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