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 7721369 B1

PDF
Full Text
Expired
Date of Patent:
May. 25, 2010

Filed:

Mar. 14, 2005
Applicants:

Shangang Hao, Guangdong, CN;

Zhaohong Zhang, Guangdong, CN;

LI Han, Guangdong, CN;

Inventors:

Shangang Hao, Guangdong, CN;

Zhaohong Zhang, Guangdong, CN;

Li Han, Guangdong, CN;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E01D 19/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

The invention provides a transition board apparatus for a passenger bridge and a spring leaf thereof. A transition board apparatus includes a transition board and a spring leaf, wherein the transition board comprises a hinged end, a free end and the transition portion between them. The hinged end hinges on the end of the first tunnel bottom plate. The spring leaf is provided with the holding portion, which is secured on the sidewall of the first tunnel, and the bearing portion, which is used to raise the transition board up. Thus, there is a clearance between the free end and the bottom plate ornament laid on the second tunnel bottom plate. Therefore, when the second tunnel is moving back and forth relative to the first tunnel, the friction between the transition board and the bottom ornament can be avoided in order to protect the bottom plate ornament.


Find Patent Forward Citations

Hao, Shangang. (2010). Transition board apparatus for a passenger bridge and a spring leaf thereof (U.S. Patent No. 7721369). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7721369

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