US3851822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for defogging a roadway, landing strip or the like
Assignee: Linde GmbH
•
Filing: 1973-05-16
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Granted: 1974-12-03
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Expires: 1993-05-16
Abstract
Abstract A multiplicity of defogging devices, each having a closed refrigeration system, are arranged in two rows on opposite sides of an elongated strip to be maintained free from fog. The direction of the jet of each individual defogging device is determined by the wind direction and the location of the device in relation to the rest of the defogging devices in its row. The strength of the jets (outlet force or velocity) of the defogging devices of each row is determined by the wind velocity. The ratio between the strength of the jets of the defogging devices on the leeward side of the covered region and the strength of the jets of the defogging devices on the windward side thereof is higher than 1 and is increased with increasing wind velocity.
Inventors
- 👤 A Pocrnja
- 👤 H Wenzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:13
CPC Classifications
E; E01; E01H; E01H13/00; A; A01; A01G; A01G15/00; F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/153
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
101 words
A method of defogging an elongated region comprising the steps of: directing jets of air across said region from opposite longitudinal sides thereof including, a windward and leeward side, and At spaced apart locations along said sides; dehumidifying at least some of said jets of air; maintaining the strength of jets generally counter to the wind direction greater than jets generally in the wind direction; orienting at least one jet on each side generally parallel to the wind direction; and orienting jets on either side of said one jet at increasing angles to the wind direction away from said one jet.
Claim 2
Independent Claim
101 words
A method of defogging an elongated region comprising the steps of: directing jets of air across said region from opposite longitudinal sides thereof including, a windward and leeward side, and At spaced apart locations along said sides; dehumidifying at least some of said jets of air; maintaining the strength of jets generally counter to the wind direction greater than jets generally in the wind direction; orienting at least one jet on each side generally parallel to the wind direction; and orienting jets on either side of said one jet at increasing angles to the wind direction away from said one jet.
Claim 3
Dependent Claim
55 words
The method defined in claim 1 wherein the angle between two outermost jets and said one jet on the leeward side is approximately 20* to 50*, and the angle between two outermost jets and said one jet on the windward side is approximately 10* to 20* larger than the aforementioned angle on said leeward side.
Claim 4
Dependent Claim
43 words
The method defined in claim 2 wherein the ratio between the total strength of the jets on said leeward side and the total strength of the jets on said windward side is maintained larger than 1 and is increased with increasing wind velocity.
Claim 5
Dependent Claim
67 words
The method defined in claim 1 wherein, when the wind velocity is substantially zero, the direction of said one jet is oriented substantially normal to said windward side of said region and the direction of the corresponding opposite jet on said leeward side is oriented substantially normal to said leeward side and the angle between two outermost jets on both said sides is approximately 30* to 60*C.
Claim 6
Dependent Claim
54 words
The method defined in claim 1 wherein a jet is produced by a defogging device comprising a reheater and a blower, said blower being placed downstream of said reheater; and additional foggy air is introduced into said defogging device between said reheater and said blower, the amount of said additional foggy air being controllable.
Claim 7
Dependent Claim
24 words
The method defined in claim 5, wherein the amount of introduced foggy air is determined in response to the fog density of said region.
Claim 8
Dependent Claim
38 words
The method defined in claim 5, wherein said defogging device comprises a condenser upstream of said reheater, and the surface of said condenser is sprayed with an antifreeze agent when the temperature of said surface falls below 0*C.
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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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |