Filter device

Patent metadata

Field	Value
Publication number	US-9815009-B2
Application number	US-201113261633-A
Country	US
Kind code	B2
Filing date	Oct 6, 2011
Priority date	Oct 18, 2010
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A filter device has at least one filter element ( 37 ) accommodated in a filter housing fluid-connected to a fluid tank ( 1 ). The filter housing has at least one connection fitting ( 29 ) forming a fluid connection to the filter element ( 37 ). The filter housing is formed by a filter bowl ( 13 ) molded into the tank ( 1 ). The bowl bottom ( 17 ) has the connection fitting ( 29 ) associated with the element receiver.

First claim

What is claimed is:

1. A filter device, comprising:
a fluid tank having a bottom-side wall section;
a filter housing connected in fluid communication with said fluid tank and formed as a filter bowl integrally molded into said fluid tank, said filter housing having a housing bottom;
a filter element received in said filter housing;
a connection fitting being on said housing bottom, providing a fluid connection to said filter element and being coupled to said filter element in an operational position of said filter element; and
a connection piece being integrally molded on said housing bottom, being joined in said bottom-side wall section and having a passage through which said connection fitting extends from an outside of said fluid tank into said filter bowl.

2. A filter device according to claim 1 wherein
said bottom-side wall section of said fluid tank comprises a local indentation extending away from a base of said fluid tank and adjoining said connection piece.

3. A filter device according to claim 1 wherein
said connection fitting is fixed in said connection piece by a screw union.

4. A filter device according to claim 1 wherein
said fluid tank and said filter bowl are integrally molded together of plastic.

5. A filter device according to claim 1 wherein
said filter bowl is open on an upper wall of said fluid tank and is closed by a plastic cover threaded to an internal thread located on an opening edge region of said filter bowl such that said cover has an outside forming a part of said upper wall of said fluid tank.

6. A filter device according to claim 1 wherein
said connection fitting supplies unfiltered fluid to a dirty side of said filter element and interacts with said filter element.

7. A filter device, comprising:
a fluid tank having a bottom-side wall section;
a filter housing connected in fluid communication with said fluid tank and formed as a filter bowl integrally molded into said fluid tank, said filter housing having a housing bottom;
a filter element received in said filter housing;
a connection fitting being on said housing bottom, providing a fluid connection to said filter element and being coupled to said filter element in an operational position of said filter element; and
a connection piece being integrally molded on said housing bottom and on said bottom-side wall section and having a passage through which said connection fitting extends from an outside of said fluid tank into said filter bowl, said bottom-side wall section of said fluid tank including a local indentation extending away from a base of said fluid tank and adjoining said connection piece.

8. A filter device according to claim 7 wherein
said connection fitting is fixed in said connection piece by a screw union.

9. A filter device according to claim 7 wherein
said fluid tank and said filter bowl are integrally molded together of plastic.

10. A filter device according to claim 7 wherein
said filter bowl is open on an upper wall of said fluid tank and is closed by a plastic cover threaded to an internal thread located on an opening edge region of said filter bowl such that said cover has an outside forming a part of said upper wall of said fluid tank.

11. A filter device according to claim 7 wherein
said connection fitting supplies unfiltered fluid to a dirty side of said filter element and interacts with said filter element.

12. A filter device, comprising:
a fluid tank having a bottom-side wall section;
a filter housing connected in fluid communication with said fluid tank and formed as a filter bowl integrally molded into said fluid tank, said filter housing having a housing bottom;
a filter element received in said filter housing;
a connection fitting being on said housing bottom, providing a fluid connection to said filter element and being coupled to said filter element in an operational position of said filter element; and
a connection piece being integrally molded on said housing bottom and on said bottom-side wall section and having a passage through which said connection fitting extends from an outside of said fluid tank into said filter bowl, said connection fitting supplying unfiltered fluid to a dirty side of said filter element, said connection fitting interacting with said filter element.

13. A filter device according to claim 12 wherein
said connection fitting is fixed in said connection piece by a screw union.

14. A filter device according to claim 12 wherein
said fluid tank and said filter bowl are integrally molded together of plastic.

15. A filter device according to claim 12 wherein
said filter bowl is open on an upper wall of said fluid tank and is closed by a plastic cover threaded to an internal thread located on an opening edge region of said filter bowl such that said cover has an outside forming a part of said upper wall of said fluid tank.

Assignees

• Schmitt Ralf
• Scholl Thomas
• Hydac Filtertechnik Gmbh

Inventors

• Schmitt Ralf
• Scholl Thomas

Classifications

• B01D35/30

  Filter housing constructions · CPC title

• B01D35/143

  Filter condition indicators · CPC title

• B01D35/1576

  Calibrated passages · CPC title

• B01D35/157 Primary

  Flow control valves: Damping or calibrated passages · CPC title

• B01D2201/291

  End caps · CPC title