US4022693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filter having multiple filtering elements
Assignee: Pall Filter Specialists Inc
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Filing: 1976-06-10
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Granted: 1977-05-10
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Expires: 1996-06-10
Abstract
Abstract A filter which includes a container-shaped housing having a top wall with multiple openings therein. A filter element is fitted into each housing top wall opening. A cover having an offset portion spans the housing top wall with the offset portion thereof being located spacedly above each of the filter elements. The filter housing includes a liquid outlet. A liquid inlet is provided which directs liquid into the space under the offset portion of the cover. The liquid then passes downwardly through the filter elements, into the interior of the housing, and out the liquid outlet in the housing.
Inventors
- 👤 Howard William Morgan, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:17
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/27; B01D29/50; B01D29/52; B01D29/88; B01D29/90; B01D29/902; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0446
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
215 words
A filter comprising a housing including side and bottom walls and having a top wall spaced from said bottom wall, said housing having a liquid outlet, said housing top wall having at least two spaced openings formed therein, removable bag-shaped filtering means for straining a liquid having an open upper end fitted into each top wall opening, each filtering means being supported by said top wall at its open end projecting into the interior of said housing below said top wall, a removable cover spanning said housing top wall, said cover including a peripheral lower face portion and an inner upper face portion upwardly offset from said lower face portion, said cover lower face portion overlying only a section of each filtering means at its open end to retain said filtering means within said housing top wall openings, said cover upper face portion being spaced from said housing top wall and from each filtering means at its open end to provide flow passages from the upper face portion to each filtering means open end, and a liquid inlet in communication with said cover upper face portion whereby liquid can pass through the inlet into the filtering means and thereafter through said filtering means and into the interior of said housing and out the outlet therein.
Claim 2
Dependent Claim
215 words
A filter comprising a housing including side and bottom walls and having a top wall spaced from said bottom wall, said housing having a liquid outlet, said housing top wall having at least two spaced openings formed therein, removable bag-shaped filtering means for straining a liquid having an open upper end fitted into each top wall opening, each filtering means being supported by said top wall at its open end projecting into the interior of said housing below said top wall, a removable cover spanning said housing top wall, said cover including a peripheral lower face portion and an inner upper face portion upwardly offset from said lower face portion, said cover lower face portion overlying only a section of each filtering means at its open end to retain said filtering means within said housing top wall openings, said cover upper face portion being spaced from said housing top wall and from each filtering means at its open end to provide flow passages from the upper face portion to each filtering means open end, and a liquid inlet in communication with said cover upper face portion whereby liquid can pass through the inlet into the filtering means and thereafter through said filtering means and into the interior of said housing and out the outlet therein.
Claim 3
Dependent Claim
62 words
The filter of claim 1 and a plurality of spaced projection means depending from said cover upper face portion, at least one said projection means overlying each filtering means at a location spaced from said section overlaid by said cover lower face portion for retaining said filtering means within said housing top wall openings in conjunction with said cover lower face portion.
Claim 4
Dependent Claim
62 words
The filter of claim 2 wherein said housing side wall is formed about an axis extending through the top wall thereof, said top wall having at least three of said openings therein formed angularly about and spaced from said housing axis, a said filtering means fitted removably within each opening, a said projection means overlying each filtering means at its open end.
Claim 5
Dependent Claim
112 words
The filter of claim 3 and conduit means defining said inlet extending through the interior of said housing and terminating in an open end part in said housing top wall under said cover upper face portion and between said top wall openings for conducting liquid from an outside source to that area between said cover upper face portion and said housing top wall above said filtering means open ends, said top wall openings being equally spaced apart and equal radially spaced from said housing axis, at least two of said projection means overlying each filtering means open end, said filtering means being spaced from said open end part of the conduit means.
Claim 6
Dependent Claim
50 words
The filter of claim 1 wherein said housing side wall is formed about an axis extending through the top wall thereof, said top wall having at least three of said openings therein formed angularly about and spaced from said housing axis, a said filtering means fitted removably within each opening.
Claim 7
Dependent Claim
79 words
The filter of claim 5 and conduit means defining said inlet extending coaxially through the interior of said housing and terminating in an open end part in said housing top wall under said cover upper face portion and between said top wall openings for conducting liquid from an outside source to that area between said cover upper face portion and said housing top wall above said filtering means open ends whereby said liquid can pass through said filtering means.
Claim 8
Dependent Claim
22 words
The filter of claim 6 wherein said top wall openings are equally spaced apart and equal radially spaced from said housing axis.
Claim 9
Dependent Claim
64 words
The filter of claim 3 wherein said housing top wall is concentric with said housing axis, said top wall openings being spaced apart and inwardly spaced from the outer edge of said top wall, a plurality of hold down means for securing said cover to said housing, said hold down means being peripherally located about and inwardly spaced from said top wall outer edge.
Claim 10
Dependent Claim
48 words
The filter of claim 8 and a continuous seal means compressed between said cover lower face portion and housing top wall, said seal means for enclosing said top wall openings and extending between each such opening and top wall outer edge and inwardly of each hold down means.
Claim 11
Dependent Claim
42 words
The filter of claim 9 wherein said top wall openings are equal angularly spaced apart and equal radially spaced from said housing axis, said hold down means being equal angularly spaced from one another and angularly offset from said top wall openings.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |