Filter having baseplate with internal gasket location
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-027/00
B01D-035/28
B01D-035/30
B01D-035/00
출원번호
US-0950472
(2007-12-05)
등록번호
US-8132675
(2012-03-13)
발명자
/ 주소
Calcaterra, Farrell F.
Merritt, Steven J.
출원인 / 주소
Baldwin Filters, Inc.
대리인 / 주소
Reinhart Boerner Van Deuren P.C.
인용정보
피인용 횟수 :
0인용 특허 :
22
초록
The present disclosure pertains to a fluid filter having a gasket locator such as a cylindrical wall on the underside of the baseplate which positions and supports an internal gasket.
대표청구항▼
1. A filter cartridge comprising: a generally cylindrical housing having a cavity;a base plate secured to said housing, the base plate providing an inlet and an outlet;a ring of filter media within the cavity, the filter media arranged to filter fluid flowing between the inlet and the outlet;an end
1. A filter cartridge comprising: a generally cylindrical housing having a cavity;a base plate secured to said housing, the base plate providing an inlet and an outlet;a ring of filter media within the cavity, the filter media arranged to filter fluid flowing between the inlet and the outlet;an end cap attached to one end of said filter media;an annular gasket having a radially outer peripheral edge and a radially inner peripheral edge, the annular gasket interposed between said end cap and said base plate; anda gasket locator interposed between said end cap and said base plate and adjacent said annular gasket, said gasket locator contacting the radially inner peripheral edge of the gasket and free from contact with the radially outer peripheral edge of the gasket such that the gasket can deform radially outward from the gasket locator, the gasket locator extending axially away from a bottom surface of the base plate and axially abutting the end cap when the ring of filter media is installed within the cavity, the gasket locator and base plate forming a single continuous piece of material. 2. The filter cartridge as in claim 1, wherein said gasket locator is integrally formed into said base plate. 3. The filter cartridge as in claim 2, wherein said gasket locator is an annular wall molded into a bottom side of said base plate. 4. The filter cartridge as in claim 3, wherein said annular gasket is axially compressed between the end cap and the base plate, said gasket being axially thicker than the annular wall. 5. The filter cartridge of claim 1, wherein the base plate includes an outer rim and a central hub connected by a radially extending flange portion, the central hub projecting axially inwardly into a central opening of the end cap, wherein the gasket locator is disposed intermediate the central hub and the outer rim. 6. The filter cartridge of claim 5, wherein the gasket locator is an annular wall integrally formed on a bottom side of the flange portion. 7. The filter cartridge of claim 6, wherein the annular gasket is arranged radially outboard of the annular wall, wherein the inlet is arranged to inlet a higher pressure fluid to a region defined between the housing and an outside of the filter media, wherein the higher pressure fluid is adapted to undergo a pressure drop across the media and create a pressure differential across the gasket, wherein the annular wall is arranged to support the annular gasket against the higher pressure. 8. The filter cartridge of claim 7, wherein the rim is solid and free of holes, and wherein the inlet comprises a plurality of inlet holes formed in the flange portion. 9. The filter cartridge of claim 8, wherein the hub slidably and freely fits into the opening of the end cap freely without interference and without seals therebetween. 10. The filter cartridge of claim 9, wherein the base plate is a plastic member and wherein the rim defines a plurality of threads. 11. The filter cartridge as in claim 1, wherein said annular gasket is interposed between the inlet and the outlet preventing circumvention of the filter media between the end cap and said base plate. 12. A filter cartridge, comprising: (a) a deep drawn metal canister having a first end and a second end, the second end being of a smaller diameter than the first end, the metal canister having a generally cylindrical sidewall between first and second ends includes a plurality of stepped regions;(b) a baseplate formed of plastic material attached directly to the first end by deformation of the first end over the baseplate, the baseplate including a central hub and an outer rim connected by a radially extending flange portion, the hub and the outer rim extending in opposite axial directions from the flange portion, the baseplate further including: (i) a plurality of inlet openings formed through the flange portion;(ii) an annular seal support wall formed on a bottom side of the baseplate, the baseplate and annular seal support wall forming a single continuous piece of material;(iii) a plurality of outlet openings defined by the hub; and(iv) means for actuating a valve formed integrally with the hub;(c) an internal filter element contained in the canister, the filter element including a cylindrical ring of filter media and top and bottom end caps sealingly bonded to opposing ends of the ring of filter media, the top end cap having an opening receiving the hub;(d) a spring in the canister and supported by one of the stepped regions urging the filter element against the baseplate;(e) a threaded ring secured by the second end of the canister, the threaded ring defining a drain port;(f) a first outer gasket arranged on the outer rim;(g) a second outer gasket arranged on the hub;(h) an annular gasket arranged radially outboard of the annular wall, wherein the inlet openings are arranged to inlet a higher pressure fluid to a region defined between the housing and an outside of the filter media, wherein the higher pressure fluid is adapted to undergo a pressure drop across the filter media and create a pressure differential across the gasket, wherein the annular seal support wall is arranged to support the annular gasket against the higher pressure;wherein the annular support wall is free of contact with a radially outer peripheral edge of the annular gasket, and wherein the annular support wall extends axially away from the bottom side of the baseplate such that the annular support wall axially abuts the top end cap when the internal element is installed in the canister. 13. The filter cartridge of claim 12, wherein said annular gasket is axially compressed between the end cap and the base plate, said gasket being axially thicker than the annular wall, and wherein the annular wall is sized to control the maximum amount of compression of the annular gasket and prevent overcompression of the annular gasket, the annular wall adapted to bottom out on the top end cap to prevent overcompression.
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