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. 18, 2001
Filed:
Nov. 03, 1999
John Arnett, Cookeville, TN (US);
Fleetguard, Inc., Nashville, TN (US);
Abstract
A duplex fluid filter assembly has first and second alternate duty filters. A valve assembly controls fluid flow between respective alternate flow paths. The valve assembly has a stationary valve body having an inner cylindrical wall defining a hollow cylindrical interior extending along an axis, and plural radial ports having inner ends opening into the hollow interior and communicating with an inlet, an outlet, and respectively entrances and exits of respective flow paths. A movable valve member has an outer cylindrical wall defining a cylinder extending along the axis in the hollow cylindrical interior of the valve body, and is rotatable about the axis. The valve member has first and second axially spaced interior passages, and first and second sets of transfer passages extending radially outwardly from respective interior passages. A plurality of valve seal assemblies are provided, one in each of the transfer passages, each valve seal assembly having a seal element with an outer face portion at the outer end of a respective transfer passage and engaging the inner cylindrical wall of the valve body and circumferentially movable across and into and out of radial alignment with the inner end of the respective radial port in the valve body.