Liquid purification or separation – With repair or assembling means
Reexamination Certificate
2005-01-04
2005-01-04
Therkorn, Ernest G. (Department: 1723)
Liquid purification or separation
With repair or assembling means
C210S430000, C210S435000, C210S444000, C210S453000, C210S455000, C210S457000
Reexamination Certificate
active
06837993
ABSTRACT:
A filter assembly includes housing enclosing a replaceable filter element. A support core is provided in the housing, and includes an extension and locking assembly. The element includes a ring of filtration media with a pair of end caps. The first end cap includes a central opening to receive the support core. The extension and locking assembly prevents the cover of the housing from being attached to the housing body without a proper filter element installed. The extension and locking assembly includes a bypass member and a locking member, which are in locking engagement when an element is absent in the housing. The second end cap includes internal protrusions which engage the locking member when the filter element is installed to disengage the bypass member from the support core, and allow the element to be inserted and the cover to be installed.
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Copy of the Communication Relating to the Results of the Partial International Search in corresponding PCT Case PCT/US01/14759.
Copy of Notification of the International Search Report or the Declaration, dated Jan. 21, 2002, in corresponding PVT Application No. PCT/US01/14759.
Copy of International Application No. WO 92/18397 entitled “Re-Usable Packing Container for Filter Elements” published Oct. 29, 1992.
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Copy of International Publication No. WO 01/21278 dated Mar. 23, 2001.
Clausen Michael D.
Knight Steven R.
Maxwell Martin C.
Hunter Christopher H.
Parker-Hannifin Corporation
Therkorn Ernest G.
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