Patent US2323447A successfully refreshed from Google Patents.
Patent US5472379A successfully refreshed from Google Patents.
US5472379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter for the interior of motor vehicles
Assignee: Mann and Hummel GmbH
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Filing: 1994-04-15
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Granted: 1995-12-05
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Expires: 2014-04-15
Abstract
Abstract An air filter includes a housing having an air inlet and an air outlet. A filter element is insertable into the housing. The filter element includes a filter medium folded in an accordion-like manner, as well as a surrounding seal for sealing off a pure-air area. The air inlet of the housing has the same cross-section as that of the filter element. Holders are arranged on the housing via film hinges. The holders operate to fix the filter element in an installed position in the housing.
Inventors
- 👤 Heinz Andress
- 👤 Arthur Klotz
- 👤 Christof Mangold
- 👤 Hermann Maurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:16
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/0002; B01D46/0005; B01D46/10; B60; B60H; B60H3/00; B60H3/06; B60H3/0658; B60H3/0608; B60H2003/065
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
142 words
An air filter, comprising: a housing having an air inlet and an air outlet; a filter element insertable into said housing, said filter element including a filter medium folded in an accordion-like manner, as well as a surrounding seal for sealing off a pure-air area, said air inlet of said housing having a cross-section corresponding with that of said filter element; and holders arranged on said housing via film hinges, said holders operating to fix said filter element in an installed position in said housing, said housing being provided with an outwardly projecting supporting rib associated with each of said holders, said associated ribs comprising curved upper surfaces along which said holders slide between an open position in which said filter element can be removed from the housing and a closed position in which the filter element is fixed in the housing.
Claim 2
Dependent Claim
142 words
An air filter, comprising: a housing having an air inlet and an air outlet; a filter element insertable into said housing, said filter element including a filter medium folded in an accordion-like manner, as well as a surrounding seal for sealing off a pure-air area, said air inlet of said housing having a cross-section corresponding with that of said filter element; and holders arranged on said housing via film hinges, said holders operating to fix said filter element in an installed position in said housing, said housing being provided with an outwardly projecting supporting rib associated with each of said holders, said associated ribs comprising curved upper surfaces along which said holders slide between an open position in which said filter element can be removed from the housing and a closed position in which the filter element is fixed in the housing.
Claim 3
Dependent Claim
28 words
An air filter according to claim 1, wherein said housing is made of a thermoplastic material and said holders are manufactured in one piece integral with the housing.
Claim 4
Dependent Claim
22 words
An air filter according to claim 1, wherein each of said holders have at least one rib which contacts said filter element.
Claim 5
Dependent Claim
22 words
An air filter according to claim 2, wherein each of said holders have at least one rib which contacts said filter element.
Claim 6
Dependent Claim
37 words
An air filter according to claim 1, wherein said filter element is one of a paper and plastic nonwoven filter element, and said surrounding seal of said filter element is formed of PUR-foam on a polyester base.
Claim 7
Dependent Claim
37 words
An air filter according to claim 2, wherein said filter element is one of a paper and plastic nonwoven filter element, and said surrounding seal of said filter element is formed of PUR-foam on a polyester base.
Claim 8
Dependent Claim
37 words
An air filter according to claim 3, wherein said filter element is one of a paper and plastic nonwoven filter element, and said surrounding seal of said filter element is formed of PUR-foam on a polyester base.
Claim 9
Dependent Claim
37 words
An air filter according to claim 4, wherein said filter element is one of a paper and plastic nonwoven filter element, and said surrounding seal of said filter element is formed of PUR-foam on a polyester base.
Claim 10
Dependent Claim
20 words
An air filter according to claim 1, wherein said air filter is installed in an interior of a motor vehicle.
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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) | 1998-12-04 | 1999-06-05 | 1999-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-04 | 2003-06-05 | 2003-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-04 | 2007-06-05 | 2007-12-05 | $7700.00 | Window Closed / Lapsed |