US4452697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter for diesel fuel
Assignee: Daimler Benz AG
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Filing: 1981-07-24
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Granted: 1984-06-05
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Expires: 2001-07-24
Abstract
Abstract A filter for diesel fuel, with the filter including a filter housing surrounding a filter pack. The filter housing is of a double shell construction and an interspace is provided between the two housing shells. The interspace is tightly sealed all around to an exterior of the housing.
Inventors
- 👤 Ulrich Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:29
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18; B01D27/00; B01D27/08; F; F02; F02M; F02M37/00; F02M37/22; F02M37/32; F02B; F02B3/00; F02B3/06; Y; Y10; Y10S; Y10S210/00; Y10S210/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A filter arrangement for diesel fuel, the filter including a filter housing having an inner shell and a filter pack therein, the arrangement comprising means for reducing gas bubble formation in and paraffin condensation from said diesel fuel by reducing heat transmission from and to the interior of the inner shell, said means for reducing comprising outer shell means for tightly sealing in an interspace between said inner shell and other shell means, a body of air at atmospheric pressure adjacent said inner shell reducing movement of said body of air with respect to the inner shell to insulate the inner shell against heat transmission from and to the interior of the inner shell, and wherein the outer shell means for sealing the interspace comprises a cover member having a flange at an outer periphery thereof.
Claim 2
Dependent Claim
136 words
A filter arrangement for diesel fuel, the filter including a filter housing having an inner shell and a filter pack therein, the arrangement comprising means for reducing gas bubble formation in and paraffin condensation from said diesel fuel by reducing heat transmission from and to the interior of the inner shell, said means for reducing comprising outer shell means for tightly sealing in an interspace between said inner shell and other shell means, a body of air at atmospheric pressure adjacent said inner shell reducing movement of said body of air with respect to the inner shell to insulate the inner shell against heat transmission from and to the interior of the inner shell, and wherein the outer shell means for sealing the interspace comprises a cover member having a flange at an outer periphery thereof.
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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |