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. 05, 1989
Filed:
Apr. 04, 1988
Applicant:
Inventors:
James A Erhardt, Patchogue, NY (US);
Bruce E Richardson, Middle Island, NY (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F24D / ;
U.S. Cl.
CPC ...
237 / ; 236 / ;
Abstract
This invention relates to an electronic flow control circuit for use in the low voltage section of an existing control arrangement of a hydronic heating system that utilizes motorized zone valves, to provide a means for controlling fluid flow through the system in order to eliminate hydrostatic shock (water hammer) associated with fast closing motorized zone valves.