Patent US4460520A successfully refreshed from Google Patents.
US4460520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporative cooler water spreader
Assignee: Coolair Corp Pte Ltd
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Filing: 1982-06-14
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Granted: 1984-07-17
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Expires: 2002-06-14
Abstract
Abstract A spreader plate having a water receiving area which receives water from a pump, a plurality of ribs radiating outwardly from the central water receiving area, the lengths and spacing of the ribs being such as to divide the water up into a plurality of streams of approximately equal intensity, and a cover over the water receiving area comprising a deflector which deflects water flow over the water receiving area in a constant thickness film and into the channels between the ribs.
Inventors
- 👤 Robert W. Wrightson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:23
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/06; F28C3/08; Y; Y10; Y10S; Y10S261/00; Y10S261/03; Y10S261/43
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
193 words
A spreader for the spreading of water in an evaporative cooler of the type having absorbent pads at least partly surrounding a motor driven fan, comprising: a spreader plate having a water receiving area, a plurality of ribs upstanding from the plate and radiating outwardly from the water receiving area and forming between them a plurality of water flow channels, which, in a cooler, terminate above said absorbent pads, the floor of each said water flow channel sloping downwardly from its water receiving area end, a cover over the water receiving area of the spreader plate, having a deflector surface above the water receiving area and having such shape as to deflect water flow over the water receiving area in a constant thickness film, the lengths of said ribs varying, and the spaces between the water receiving area ends of shorter ribs being less than the spaces between corresponding ends of longer ribs by such an amount that additional resistance to water flow along each of the longer channels is compensated for by a wider entry to that respective said channels such as to divide said film into streams having equal flow rates.
Claim 2
Dependent Claim
193 words
A spreader for the spreading of water in an evaporative cooler of the type having absorbent pads at least partly surrounding a motor driven fan, comprising: a spreader plate having a water receiving area, a plurality of ribs upstanding from the plate and radiating outwardly from the water receiving area and forming between them a plurality of water flow channels, which, in a cooler, terminate above said absorbent pads, the floor of each said water flow channel sloping downwardly from its water receiving area end, a cover over the water receiving area of the spreader plate, having a deflector surface above the water receiving area and having such shape as to deflect water flow over the water receiving area in a constant thickness film, the lengths of said ribs varying, and the spaces between the water receiving area ends of shorter ribs being less than the spaces between corresponding ends of longer ribs by such an amount that additional resistance to water flow along each of the longer channels is compensated for by a wider entry to that respective said channels such as to divide said film into streams having equal flow rates.
Claim 3
Dependent Claim
17 words
A spreader according to claim 1 wherein said deflector surface is the under surface of the cover.
Claim 4
Dependent Claim
36 words
A spreader according to claim 1 or claim 2 wherein said spreader plate comprises a hollow water flow tail depending from the apex of a conical portion of the plate which defines said water receiving area.
Claim 5
Dependent Claim
47 words
A spreader according to claim 2 wherein the periphery of said spreader plate comprises upstanding flanges to which said ribs extend, each flange being discontinuous intermediate each pair of adjacent ribs to provide a water release space at the end of each respective said water flow channel.
Claim 6
Dependent Claim
58 words
A spreader according to claim 4 wherein said flanges also depend from the periphery of said spreader plate, and further comprising fins depending from the under surface of said spreader plate and so spaced from said depending flanges as to form retention means for the retaining of the upper edges of said absorbent pads, when in a cooler.
Claim 7
Dependent Claim
32 words
A spreader according to claim 5 wherein a front face of each said flange comprises surfaces defining a plurality of grooves, each groove being located beneath a respective said water release space.
Claim 8
Dependent Claim
58 words
A spreader according to claim 6 wherein said flanges also depend from the periphery of said spreader plate; and further comprising fins depending from the under surface of said spreader plate and so spaced from said depending flanges as to form retention means for the retaining of the upper edges of said absorber pads, when in a cooler.
Claim 9
Dependent Claim
47 words
A spreader according to claim 1 wherein the periphery of said spreader plate comprises upstanding flanges to which said ribs extend, each flange being discontinuous intermediate each pair of adjacent ribs to provide a water release space at the end of each respective said water flow channel.
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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) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |