US4350592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cartridge filter
Assignee: Individual
•
Filing: 1980-04-10
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Granted: 1982-09-21
•
Expires: 2000-04-10
Abstract
Abstract A cartridge filter for gases and liquids having a filter element clamped between an upper and lower cover. The filter includes a profile ring composed of a sealing compound which is firmly connected to the upper end face and an identical and corresponding profile ring firmly connected to the lower end face of the filter element. Sealing rings are embedded in the profile rings. The covers each includes one circumferential groove engaging around the sealing rings in a claw-like manner.
Inventors
- 👤 Dirk G. Kronsbein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:14
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2411; B01D24/00; B01D24/02; B01D24/04; B01D24/08; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/23; B01D29/50; B01D29/56; B01D29/58; B01D35/00; B01D35/30; B01D46/0002; B01D46/0004; B01D46/0039; B01D46/0041; B01D46/0043; B01D2265/00; B01D2265/02; B01D2265/06; B01D2271/00; B01D2271/02; B01D2271/022; B01D2275/00; B01D2275/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
In a cartridge filter for gases and liquids having a filter element clamped between an upper and lower cover, the improvement comprising that said filter includes a profile ring composed of a epoxy resin sealing compound cast onto the upper end edge of the filter element and an identical and corresponding profile ring cast onto the lower end edge of the filter element and sealing rings embedded in said profile rings, said profile rings each including one circumferential groove engaging around said sealing rings in a claw-like manner.
Claim 2
Dependent Claim
88 words
In a cartridge filter for gases and liquids having a filter element clamped between an upper and lower cover, the improvement comprising that said filter includes a profile ring composed of a epoxy resin sealing compound cast onto the upper end edge of the filter element and an identical and corresponding profile ring cast onto the lower end edge of the filter element and sealing rings embedded in said profile rings, said profile rings each including one circumferential groove engaging around said sealing rings in a claw-like manner.
Claim 3
Dependent Claim
33 words
A filter according to claim 1 wherein the filter element consists of two coaxial support wall cylinders with through openings, between which cylinders a filter medium of a plurality of layers is situated.
Claim 4
Dependent Claim
36 words
A filter according to claim 2, wherein the filter medium is of three-layer composition having a middle layer, which is a main filter layer and two prefilter layers positioned on opposite sides of said middle layer.
Claim 5
Dependent Claim
21 words
A filter according to claim 2, wherein a filter jacket of filter material is situated on the outer support wall cylinder.
Claim 6
Dependent Claim
40 words
A filter according to claim 2, further including a tension rod screwed into the upper cover, and which passes through the lower cover and said rod comprises a threaded portion at its lower end which is secured to a nut.
Claim 7
Dependent Claim
13 words
A filter according to claim 1, wherein said upper cover contains through openings.
References Cited (Backward Citations)
GB709897A
Cited
GB756336A
Cited
GB794372A
Cited
GB816520A
Cited
GB907747A
Cited
GB880537A
Cited
GB988692A
Cited
GB1018379A
Cited
GB1382320A
Cited
GB1437004A
Cited
FR2255933A1
Cited
US3870490A
Cited
US4104170A
Cited
GB1518097A
Cited
US4102785A
Cited
US4074985A
Cited
US4231768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-20 | 1986-03-22 | 1986-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-20 | 1990-03-22 | 1990-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-20 | 1994-03-22 | 1994-09-21 | $7700.00 | Window Closed / Lapsed |