Patent US3662893A successfully refreshed from Google Patents.
US3662893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter cartridge
Assignee: Dana Inc
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Filing: 1969-08-25
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Granted: 1972-05-16
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Expires: 1989-08-25
Abstract
Abstract A filter cartridge having a pleated paper filter element therein and concentrically therewith a molded porous filter element that has a resin incorporated therein, the molded element having an outer surface configuration providing channels for the flow of fluid and with the molded element providing a support for the inner peaks of the pleated paper filter element.
Inventors
- 👤 Kingsley E Humbert Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:32
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/02; B01D27/04; B01D27/06; B01D27/10; B01D27/103; B01D27/106; B01D27/14; B01D27/142; B01D27/144; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/31; B01D29/33; B01D29/50; B01D29/52; B01D29/54; B01D2201/00; B01D2201/12; B01D2201/122
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
195 words
A filter cartridge comprising a housing having a closed end and an open end, closure means closing the open end, inlet and outlet openings in the closure means, a pleated paper filter media having inner and outer peaks within the housing, the paper filter media having a longitudinal central opening therein with the inner peaks forming the periphery of the central opening, a molded cylindrical filtEr block having an outer surface positioned within the central opening, the outer surface having a plurality of high areas throughout the length of the block, the high areas being non-continuous circumferentially and displaced vertically from each other, the placement of the high areas forming circumferential grooves and a plurality of short vertical grooves with the short grooves being displaced from each other but interconnected vertically by the circumferential grooves providing tortuous flow passages for the filtered fluid between the inner peaks and the filter block to the outlet, the high areas having spaced portions thereof in vertical alignment providing support for the inner peaks, the filter media and block being interposed between the inlet and outlet whereby fluid entering the inlet will be filtered before passing through the outlet.
Claim 2
Dependent Claim
195 words
A filter cartridge comprising a housing having a closed end and an open end, closure means closing the open end, inlet and outlet openings in the closure means, a pleated paper filter media having inner and outer peaks within the housing, the paper filter media having a longitudinal central opening therein with the inner peaks forming the periphery of the central opening, a molded cylindrical filtEr block having an outer surface positioned within the central opening, the outer surface having a plurality of high areas throughout the length of the block, the high areas being non-continuous circumferentially and displaced vertically from each other, the placement of the high areas forming circumferential grooves and a plurality of short vertical grooves with the short grooves being displaced from each other but interconnected vertically by the circumferential grooves providing tortuous flow passages for the filtered fluid between the inner peaks and the filter block to the outlet, the high areas having spaced portions thereof in vertical alignment providing support for the inner peaks, the filter media and block being interposed between the inlet and outlet whereby fluid entering the inlet will be filtered before passing through the outlet.
Claim 3
Dependent Claim
210 words
A filter cartridge comprising a housing having a closed end and an open end, closure means closing the open end, inlet and outlet openings in the closure means, a pleated paper filter media having inner and outer peaks within the housing, the paper filter media having a longitudinal central opening therein with the inner peaks forming the periphery of the central opening, a molded cylindrical filter block having an outer surface positioned within the central opening, the outer surface having a plurality of high areas throughout the length of the block, the high areas being non-continuous circumferentially and vertically with each circumferential area being displaced with respect to the adjacent vertical area, the placement of the high areas forming a plurality of spiral grooves, the grooves spiralling in opposite directions and connecting with each other at spaced points about the high areas, the connections and the spiralling of the grooves providing tortuous flow passages for the filtered fluid between the inner peaks and the filter block to the outlet, the high areas having spaced portions thereof in vertical alignment providing support for the inner peaks, the filter media and block being interposed between the inlet and outlet whereby fluid entering the inlet will be filtered before passing through the outlet.
Claim 4
Dependent Claim
210 words
A filter cartridge comprising a housing having a closed end and an open end, closure means closing the open end, inlet and outlet openings in the closure means, a pleated paper filter media having inner and outer peaks within the housing, the paper filter media having a longitudinal central opening therein with the inner peaks forming the periphery of the central opening, a molded cylindrical filter block having an outer surface positioned within the central opening, the outer surface having a plurality of high areas throughout the length of the block, the high areas being non-continuous circumferentially and vertically with each circumferential area being displaced with respect to the adjacent vertical area, the placement of the high areas forming a plurality of spiral grooves, the grooves spiralling in opposite directions and connecting with each other at spaced points about the high areas, the connections and the spiralling of the grooves providing tortuous flow passages for the filtered fluid between the inner peaks and the filter block to the outlet, the high areas having spaced portions thereof in vertical alignment providing support for the inner peaks, the filter media and block being interposed between the inlet and outlet whereby fluid entering the inlet will be filtered before passing through the outlet.
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |