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:
Jul. 19, 1983
Filed:
Aug. 06, 1982
Ronald G Bukowski, Erie, PA (US);
Timothy L Johnson, Erie, PA (US);
Zurn Industries, Inc., Erie, PA (US);
Abstract
An automatic backwashing strainer system is provided for cleaning a strainer with a minimum amount of backwash water. The system includes a long time mode and a short time mode of operation in which the backwashing operation is conducted periodically with a variable duration and a variable cycle time. The system also includes a differential pressure mode of operation in which the backwashing is conducted whenever the pressure drop across the strainer exceeds a predetermined upper limit and continues for a variable time delay after the pressure drop reaches a predetermined lower limit. The particular durations, cycle times, time delays, and modes utilized to control the backwashing are selected in response to the operating conditions of the strainer system.