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:
Jan. 23, 2007
Filed:
Nov. 28, 2003
Var Lordahl, Long Grove, IL (US);
Scott H. Koepsel, Winthrop Harbor, IL (US);
Var Lordahl, Long Grove, IL (US);
Scott H. Koepsel, Winthrop Harbor, IL (US);
Other;
Abstract
A pressure balancing cartridge for mixing hot and cold water includes a casing having a sleeve therein which further includes a reciprocating balancing spool therein. There are seal members positioned to form a seal between the sleeve and the casing. Further, a spring is incorporated to protect a balancing spool of the valve from 'water hammer' shock and to mechanically shear and digest any deposited matter in the area of the spring. Still further, by using material other than stainless steel, failure of the balancing spool is eliminated in 'bad' water environments. Finally, the seal members comprise stainless steel clips or inserts. To address issues of mechanical wear, all improvements defined above increase useful longevity of the cartridge.