Patent US3762176A successfully refreshed from Google Patents.
US3762176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making snow
Assignee: Individual
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Filing: 1969-09-18
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Granted: 1973-10-02
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Expires: 1989-09-18
Abstract
Abstract A method for making artificial snow independent of ambient temperature conditions by pre-cooling water through heat exchange with a cryogenic fluid and then discharging the water through a nozzle with physical contact with the cryogenic fluid. The nozzle includes a pre-cooling portion surrounded by a housing connected to a source of cryogenic liquid and a perforate head wherein the cryogenic liquid and water are mixed just prior to discharge through the perforations of the head.
Inventors
- 👤 B Coggins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:30
CPC Classifications
F; F25; F25C; F25C3/00; F25C3/04; F25C2303/00; F25C2303/048; F25C2303/0481
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
The method of making artificial snow which comprises flowing water through a conduit to a point of discharge, pre-cooling the flowing water in a portion of said conduit near the discharge point by circulating a cryogenic liquid around it, introducing said cryogenic liquid, after such circulation, into the cooled water at a point adjacent the discharge point but sufficiently far therefrom to permit the mixture of the cryogenic liquid and water in liquid form, such introduction being effected by conducting the cryogenic liquid transversely into the water at a plurality of circumferentially spaced points to ensure prompt and uniform mixing, the rate of water flow and the temperature of the cryogenic liquid being such that freezing will not take place prior to discHarge but the atomized spray will freeze completely upon discharge, the discharge outlet being in the form of a perforated nozzle through which the liquid mixture passes in a number of streams, and the temperature and amount of cryogenic liquid being such as to ensure freezing on discharge even though the ambient temperature is above the freezing point of water.
Claim 2
Independent Claim
182 words
The method of making artificial snow which comprises flowing water through a conduit to a point of discharge, pre-cooling the flowing water in a portion of said conduit near the discharge point by circulating a cryogenic liquid around it, introducing said cryogenic liquid, after such circulation, into the cooled water at a point adjacent the discharge point but sufficiently far therefrom to permit the mixture of the cryogenic liquid and water in liquid form, such introduction being effected by conducting the cryogenic liquid transversely into the water at a plurality of circumferentially spaced points to ensure prompt and uniform mixing, the rate of water flow and the temperature of the cryogenic liquid being such that freezing will not take place prior to discHarge but the atomized spray will freeze completely upon discharge, the discharge outlet being in the form of a perforated nozzle through which the liquid mixture passes in a number of streams, and the temperature and amount of cryogenic liquid being such as to ensure freezing on discharge even though the ambient temperature is above the freezing point of water.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |