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:
Jun. 20, 1978
Filed:
Feb. 16, 1977
Stephen John Goidich, Parsippany, NJ (US);
Foster Wheeler Energy Corporation, Livingston, NJ (US);
Abstract
A damper for fluid flow control has a curved extension plate positioned with respect to the circular path defined by the end of a pivotal damper blade to provide close control of the effective open area over a wide range of damper openings. The curved extension plate has a straight portion connected tangentially to one end of an arcuate portion. The arcuate portion of the extension plate approximates the shape of a theoretically ideal curve such that in cooperation with pivoting of the damper blade, the free flow area increases approximately linear with damper opening to provide a linear response between damper blade position and fluid flow rate.