Liquid purification or separation – Filter – With central pervious tubular receiver
Reexamination Certificate
2011-07-19
2011-07-19
Griffin, Walter D (Department: 1774)
Liquid purification or separation
Filter
With central pervious tubular receiver
C210S437000, C210S493100, C210S440000, C210S167020
Reexamination Certificate
active
07980396
ABSTRACT:
A central support for a liquid filter is described. The support has a truss element disposable centrally in the liquid filter to provide a crush-resistant structure supporting a filter media of the liquid filter, elongated straight members of the truss element, connected at joints to form a coplanar cross section, and longitudinal members of the truss element, connecting the coplanar cross section and additional coplanar cross sections in a column-like configuration. The contact surfaces of the truss element for interfacing with the filter media are adapted to spread forces on the filter media over a desired surface area.
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European search report dated Dec. 18, 2009.
Anderson Denise R
Crowell & Moring LLP
Griffin Walter D
Purolator Filters NA LLC
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