IP Library › Granted Patent US 8,172,918
Granted Patent B2
US 8,172,918 · App. 12/720,999 · Granted May 8, 2012

Filter appliance

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Quick Facts
Patent No.
US 8,172,918
App. No.
12/720,999
Granted
May 8, 2012
Kind
B2
Abstract

A filter device has a filter housing and a filter element that is exchangeably arranged in the filter housing. A housing cover for closing the filter housing is provided. Interacting locking elements are arranged on the filter element and on the housing cover wherein the interacting locking elements have a locked position and a release position and are moveable between the locked position and the release position.

Claims (21)

1. A filter device comprising:

a filter housing;

a filter element that is exchangeably installable into said filter housing though an opening in said housing;

a support ring fixedly connected to and framing a circumferential outside surface of said filter element;

a housing cover removably closing over said opening of said filter housing; and

an interacting locking means having a portion arranged on said filter element and another portion arranged on said housing cover;

wherein said locking means is operable between a locked position in which said housing cover and filter element are lockably mounted together as a unit, and a released position in which said housing cover and filter element are released and disengageable from each other,

wherein a first one of said locking means is secured to said support ring and lockably engaging a second one of said locking means secured to said housing cover.

2. The filter device according to claim 1 , wherein a first one of said locking means in a mounted state of the filter device is held in said locked position by a portion of said filter housing while said housing cover is installed on said filter housing.

3. The filter device according to claim 2 , wherein said first locking means in said mounted state is configured to rest against an exterior side of said filter housing.

4. The filter device according to claim 1 , wherein said locking means are movable in a radial direction between said locked position and said released position.

5. The filter device according to claim 1 , wherein said support ring has an outer diameter that is smaller than an outer diameter of said filter housing.

6. The filter device according to claim 1 , wherein said first one said locking means is a recess and said second one of said locking means matching said first locking means is a tab engaging said recess.

7. The filter device according to claim 6 , wherein said tab is force-loaded by built-in stress in a direction of said locked position to radially move said tab into said locked position.

8. The filter device according to claim 6 , wherein said recess is provided on said housing cover and wherein said tab is provided on said filter element, wherein said tab delimits an insertion opening for an end face of said filter housing.

9. The filter device according to claim 6 , wherein said tab is provided on said housing cover and wherein said recess is provided on a support ring of said filter element wherein an insertion opening for an end face of said filter housing is delimited by said support frame.

10. The filter device according to claim 6 , comprising a prefilter integrated into said housing cover.

11. The filter device according to claim 1 , wherein

said first locking means is unitary with said support ring.

12. The filter device according to claim 11 , wherein

said second locking means is a monolithic with said housing cover.