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:
Feb. 09, 1999
Filed:
Oct. 15, 1997
Applicant:
Inventors:
Zheng Chen, Sunnyvale, CA (US);
Shangda Chen, Hongshan, Shandong, CN;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05F / ;
U.S. Cl.
CPC ...
16 50 ; 16 54 ;
Abstract
A door hinge assembly with a damper mechanism composing a cylindrical housing with caps on both ends, a shaft eccentrically mounted on the cylindrical body, and two plates mounted on the shaft. Two chambers are constructed with the above arrangement and both chambers are filled with oil-hydraulic fluid. When the shaft rotates with respective to the cylindrical body, one of the two chambers is compressed. With means of communicating the two chambers, a desirable dampening force is obtained. Bias spring(s) can be incorporated into this door hinge assembly to provide closing force, so this assembly functions as a door closer.