US4649000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporative cooler
Assignee: Individual
•
Filing: 1985-12-09
•
Granted: 1987-03-10
•
Expires: 2005-12-09
Abstract
Abstract An evaporative cooler is disclosed incorporating a horizontally disposed hollow cylindrical pad mounted for rotation above a water tray. The cylindrical pad extends into water placed in the tray and is rotated to continuously immerse a portion of the pad. The pad is supported through a plurality of rollers contacting circumferential bands positioned thereon; the rollers providing all of the support and all of the rotational force to the cylindrical pad.
Inventors
- 👤 William M. Biesemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:21
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/06; F28C3/08; F24; F24F; F24F6/00; F24F6/02; F24F6/06; Y; Y10; Y10S; Y10S261/00; Y10S261/03; Y10S261/41
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
An evaporative cooling system comprising: (a) a tray for holding water; (b) a hollow cylindrical evaporative pad having two ends mounted for rotation about a horizontal axis above said tray with a lower portion of said pad immersed in said water; (c) a pair of rotating support shafts mounted for rotation about an axis parallel to the rotational axis of said cylindrical pad, each of said shafts including a roller mounted thereon for contacting, supporting, and imparting rotational movement to said cylindrical pad; (d) said cylindrical pad including a circumferential band mounted thereon and spaced from said ends; (e) said cylindrical pad, mounted, supported, and rotated through contact between said circumferential band and said rollers, and positioned for free vertical movement into and out of contact with said rollers to permit removal of said cylindrical pad from said system without disassembly of any part of said system.
Claim 2
Dependent Claim
147 words
An evaporative cooling system comprising: (a) a tray for holding water; (b) a hollow cylindrical evaporative pad having two ends mounted for rotation about a horizontal axis above said tray with a lower portion of said pad immersed in said water; (c) a pair of rotating support shafts mounted for rotation about an axis parallel to the rotational axis of said cylindrical pad, each of said shafts including a roller mounted thereon for contacting, supporting, and imparting rotational movement to said cylindrical pad; (d) said cylindrical pad including a circumferential band mounted thereon and spaced from said ends; (e) said cylindrical pad, mounted, supported, and rotated through contact between said circumferential band and said rollers, and positioned for free vertical movement into and out of contact with said rollers to permit removal of said cylindrical pad from said system without disassembly of any part of said system.
Claim 3
Dependent Claim
165 words
An evaporative cooling system comprising: (a) a tray for holding water; (b) a hollow cylindrical evaporative pad having two ends mounted for rotation about a horizontal axis above said tray with a lower portion of said pad immersed in said water; (c) a pair of rotating support shafts mounted for rotation about an axis parallel to the rotational axis of said cylindrical pad, each of said shafts including a plurality of support rollers mounted thereon for contacting, supporting and imparting rotational movement to said cylindrical pad; (d) said cylindrical pad including a plurality of circumferential bands mounted thereon and spaced from said ends corresponding in number to the number of rollers on each of said support shafts; (e) said cylindrical pad mounted, supported, and rotated through contact between said circumferential bands and rollers, and positioned for free vertical movement into and out of contact with said rollers to permit removal of said cylindrical pad from said system without disassembly of any part of said system.
Claim 4
Dependent Claim
165 words
An evaporative cooling system comprising: (a) a tray for holding water; (b) a hollow cylindrical evaporative pad having two ends mounted for rotation about a horizontal axis above said tray with a lower portion of said pad immersed in said water; (c) a pair of rotating support shafts mounted for rotation about an axis parallel to the rotational axis of said cylindrical pad, each of said shafts including a plurality of support rollers mounted thereon for contacting, supporting and imparting rotational movement to said cylindrical pad; (d) said cylindrical pad including a plurality of circumferential bands mounted thereon and spaced from said ends corresponding in number to the number of rollers on each of said support shafts; (e) said cylindrical pad mounted, supported, and rotated through contact between said circumferential bands and rollers, and positioned for free vertical movement into and out of contact with said rollers to permit removal of said cylindrical pad from said system without disassembly of any part of said system.
Claim 5
Dependent Claim
41 words
The evaporative cooling system as set forth in claim 1 or 2 wherein said circumferential band is clamped around said hollow cylindrical evaporative pad to hold the pad in its cylindrical shape while forming a contacting surface to contact said rollers.
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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) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |