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:
Mar. 17, 2009
Filed:
Nov. 28, 2006
Kevin M. Irwin, Tucson, AZ (US);
Clint R. Haas, Tucson, AZ (US);
Philip G Roper, Tucson, AZ (US);
Rain Bird Corporation, Azusa, CA (US);
Abstract
A low-flow diaphragm valve has a flexible diaphragm that cooperates with a portion of a valve body to open and close the valve. The diaphragm may have a dome for seating in a passage between the inlet and outlet of the valve. The diaphragm may have one or more ribs for seating against other portions of the body located around the passage. The valve body may include openings or interruptions to permit fluid to flow through the valve, as well as to permit relatively small particulate matter to flow through even though the ribs contact the body such that the ribs and openings affect flow and may perform screening functions to block or restrict particulate matter of relatively large size from flowing to the passage between the dome and the valve body.