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:
Sep. 07, 1976
Filed:
May. 02, 1975
Applicant:
Inventor:
Jorgen Hartvig Petersen, Nordborg, DK;
Assignee:
Danfoss A/S, Nordborg, DK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F01B / ; F16J / ;
U.S. Cl.
CPC ...
1374895 ; 137500 ;
Abstract
The invention relates to a furnace type air throttle assembly which operates in a manner to supply a constant volume of air per unit time. This is done with a bellows and throttle arrangement in which (1) the total pressure at the inlet, which is the sum of the dynamic and static pressure, is utilized to expand the bellows and move the throttle in a closing direction and (2) static pressure and weight means are utilized to compress the bellows and move the throttle in the opening direction.