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:
Apr. 16, 1991
Filed:
Oct. 20, 1989
Applicant:
Inventor:
Volker von Erichsen, Recklinghausen, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137601 ; 137865 ; 251229 ;
Abstract
A closing arrangement for ducts having large cross-sectional areas, particularly flue gas ducts for power plants. The arrangement includes at least two flaps which are mounted on at least one flap shaft. Lever arrangements composed of crank arms and tightening arms for swinging the flaps are connected to the flaps. At least one drive shaft is connected to the lever arrangements. The drive shaft extends transversely of the flap shaft. The transverse arrangement of the drive shaft makes it possible to open and close the flaps by means of a single drive shaft.