US3785625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injector type evaporative heat exchanger
Assignee: Baltimore Aircoil Co Inc
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Filing: 1971-05-19
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Granted: 1974-01-15
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Expires: 1991-05-19
Abstract
Abstract This application discloses an evaporative heat exchanger of the injector type with improvements in mixing and air pumping which are specially adapted to either multiple circular venturies or large circular venturies or both.
Inventors
- 👤 J Engalitcheff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:31
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/06; F28D; F28D5/00; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
An evaporative heat exchanger comprising a conduit of circular cross-section having air intake and air exhaust ends, means to spray a plurality of jets of water into said conduit near the air intake end thereof to cause air to be drawn into the conduit and mixed with the water, said jets being substantially flat on opposite sides with diverging edges so as to be in the shape of a fan, said means being so-positioned that the resulting jets are symmetrically disposed in said conduit, said jets each being disposed with the long axis of its fan shape along a different radius of said conduit.
Claim 2
Dependent Claim
104 words
An evaporative heat exchanger comprising a conduit of circular cross-section having air intake and air exhaust ends, means to spray a plurality of jets of water into said conduit near the air intake end thereof to cause air to be drawn into the conduit and mixed with the water, said jets being substantially flat on opposite sides with diverging edges so as to be in the shape of a fan, said means being so-positioned that the resulting jets are symmetrically disposed in said conduit, said jets each being disposed with the long axis of its fan shape along a different radius of said conduit.
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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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |