US4256579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter for liquids
Assignee: Robert Bosch GmbH
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Filing: 1979-11-09
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Granted: 1981-03-17
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Expires: 1999-11-09
Abstract
Abstract A filter for liquids has a housing, a filtering element accommodated in the housing and having a central tube, and a vibration damper located in the housing and having a membrane, a spring biasing the membrane and a casing arranged to accommodate the membrane and the spring and including a cup-shaped portion which extends into the central tube and receives the spring therein.
Inventors
- 👤 Klaus Rose
- 👤 Ulrich Kemmner
- 👤 Peter Ringwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:55
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
106 words
A filter for liquids, comprising a housing having two ends, and an inlet and an outlet spaced from each other and each provided at a respective one of said ends; a filtering element accommodated in said housing and having a central tube; a vibration damper located in said housing in the region between one of said ends of said housing and said filtering element, said vibration damper having a membrane, a spring biasing said membrane, and a casing arranged to accommodate said membrane and said spring and including a cup-shaped portion which extends into said central tube of said filtering element and receives said spring therein.
Claim 2
Dependent Claim
106 words
A filter for liquids, comprising a housing having two ends, and an inlet and an outlet spaced from each other and each provided at a respective one of said ends; a filtering element accommodated in said housing and having a central tube; a vibration damper located in said housing in the region between one of said ends of said housing and said filtering element, said vibration damper having a membrane, a spring biasing said membrane, and a casing arranged to accommodate said membrane and said spring and including a cup-shaped portion which extends into said central tube of said filtering element and receives said spring therein.
Claim 3
Dependent Claim
27 words
A filter for liquids, as defined in claim 1, wherein said cup-shaped portion has a predetermined diameter and a length which exceeds the diameter of the same.
Claim 4
Dependent Claim
27 words
A filter for liquids, as defined in claim 2, wherein the length of said cup-shaped portion from 1.5 to 3 times exceed the diameter of the same.
Claim 5
Dependent Claim
41 words
A filter for liquids, as defined in claim 1, wherein said spring is located at one side of said membrane, said damper further having a supporting plate located at the opposite side of said membrane and fixedly connected with said casing.
Claim 6
Dependent Claim
40 words
A filter for liquids, as defined in claim 4, wherein said supporting plate is connected with said casing at a connecting point, said supporting plate having, in the region of said connecting point, edges in which said membrane is clamped.
Claim 7
Dependent Claim
33 words
A filter for liquids, as defined in claim 4, wherein said supporting plate together with said membrane form a chamber, said supporting plate having a through-going openings which are open into said chamber.
Claim 8
Dependent Claim
27 words
A filter for liquids, as defined in claim 6, wherein said openings include a central entrance opening and a plurality of exit openings surrounding said central opening.
Claim 9
Dependent Claim
19 words
A filter for liquids, as defined in claim 7, wherein said exit openings are located along a circular line.
Claim 10
Dependent Claim
22 words
A filter for liquids, as defined in claim 7, wherein said supporting plate have formations for spacing the same from said housing.
Claim 11
Dependent Claim
30 words
A filter for liquids, as defined in claim 4, wherein said said membrane is displaceable, said supporting plate having a deformable portion which forms an adjustable abutment for said membrane.
Claim 12
Dependent Claim
40 words
A filter for liquids, as defined in claim 1, wherein said cup-shaped portion of said casing has a predetermined diameter, said membrane having an outer diameter which substantially two times exceeds the diameter of said cup-shaped portion of said casing.
Claim 13
Dependent Claim
47 words
A filter for liquids, as defined in claim 1, wherein said filtering element defines a dirt side and a clean side of the filter, said cup-shaped portion of said casing having a radially enlarged section arranged to seal said dirt side and clean side from each other.
Claim 14
Dependent Claim
43 words
A filter for liquids, as defined in claim 12, wherein said central tube has an inner surface, said radially enlarged section of said cup-shaped portion of said casing having an outer surface which seal-tightly abuts against said inner surface of said central tube.
Claim 15
Dependent Claim
31 words
A filter for liquids, as defined in claim 1, wherein said membrane has a displaceable hub portion, said casing having an abutment portion which forms an abutment for said hub portion.
References Cited (Backward Citations)
US3039485A
Cited
US2707051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |