Patent US4322293A successfully refreshed from Google Patents.
US4322293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple element filter
Assignee: Individual
•
Filing: 1981-02-19
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Granted: 1982-03-30
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Expires: 2001-02-19
Abstract
Abstract In a filter for liquids including a housing which suspends multiple filtering elements and a cover. A grid is carried by the lower peripheral edge of the cover which overlies and holds the filtering elements in place when the cover is in sealing contact with the filter housing.
Inventors
- 👤 Howard W. Morgan, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:57
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/27; B01D29/50; B01D29/52; B01D29/96; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0446
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
185 words
In a filter including a housing having side and bottom walls and a top wall, said housing top wall having at least two openings therein, filtering means for straining a liquid removably carried by said top wall within each opening therein, a cover including a lower peripheral edge and a dome-shaped inner face, said cover having a closed position spanning said housing top wall with the inner face thereof spaced from said filtering means, a liquid inlet in communication with said filtering means between said cover inner face and housing top wall whereby liquid can pass from the inlet into said filtering means and thereafter through the filtering means and into the interior of said housing and out an outlet therein, the improvement comprising grid means carried by said cover at its lower peripheral edge and spanning said inner face thereof, said grid means being positioned adjacent said filtering means for retaining the filtering means within said top wall openings when said cover is in its closed position, said grid means having openings therein to accommodate liquid flow from the inlet into the filtering means.
Claim 2
Dependent Claim
185 words
In a filter including a housing having side and bottom walls and a top wall, said housing top wall having at least two openings therein, filtering means for straining a liquid removably carried by said top wall within each opening therein, a cover including a lower peripheral edge and a dome-shaped inner face, said cover having a closed position spanning said housing top wall with the inner face thereof spaced from said filtering means, a liquid inlet in communication with said filtering means between said cover inner face and housing top wall whereby liquid can pass from the inlet into said filtering means and thereafter through the filtering means and into the interior of said housing and out an outlet therein, the improvement comprising grid means carried by said cover at its lower peripheral edge and spanning said inner face thereof, said grid means being positioned adjacent said filtering means for retaining the filtering means within said top wall openings when said cover is in its closed position, said grid means having openings therein to accommodate liquid flow from the inlet into the filtering means.
Claim 3
Dependent Claim
18 words
The filter of claim 1 wherein said grid means includes transversely oriented bars forming said grid means openings.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-29 | 1985-09-28 | 1986-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-29 | 1989-09-28 | 1990-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-29 | 1993-09-28 | 1994-03-30 | $7700.00 | Window Closed / Lapsed |