US4995243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drop-in refrigeration unit
Assignee: FRELLUM Pty Ltd
•
Filing: 1989-01-23
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Granted: 1991-02-26
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Expires: 2009-01-23
Abstract
Abstract A refrigeration unit composed of a drop-in package to be accommodated within an aperture in the top of a cabinet, and comprising a plug insertable neatly into the aperture and mounting refrigeration components on top and an evaporator together with an air impeller in an underside compartment, abutment means on the plug to limit intrusion of the plug to a position substantially flush with the ceiling of the cabinet, and air ducts directing air flow from the air impeller in a path adjacent the ceiling due to a sweeping curvature of a wall of each air duct which influences the path of air flow in compliance with the "Coanda" effect.
Inventors
- 👤 Allan Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:38
CPC Classifications
F; F25; F25D; F25D19/00; F25D19/02; Y; Y10; Y10S; Y10S62/00; Y10S62/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
A drop-in package refrigeration unit for installation within an aperture in the roof of a refrigerator cabinet, said refrigeration unit comprising a heat insulating plug closing said aperture when said unit is installed, a depending peripheral skirt integral with said plug and defining a compartment at the underside of the plug, abutment means on said plug engageable with the roof of said cabinet to ensure that said skirt does not intrude substantially into said cabinet, refrigeration components mounted upon the top of the plug, a refrigeration evaporator positioned within said compartment, an air impeller within said compartment operating to create air flow over said evaporator, and air ducting defined by said skirt which includes a wall inwardly curved along its length and tapering towards a lower end of said skirt to direct said air flow from the evaporator in a path adjacent the ceiling within said cabinet.
Claim 2
Dependent Claim
147 words
A drop-in package refrigeration unit for installation within an aperture in the roof of a refrigerator cabinet, said refrigeration unit comprising a heat insulating plug closing said aperture when said unit is installed, a depending peripheral skirt integral with said plug and defining a compartment at the underside of the plug, abutment means on said plug engageable with the roof of said cabinet to ensure that said skirt does not intrude substantially into said cabinet, refrigeration components mounted upon the top of the plug, a refrigeration evaporator positioned within said compartment, an air impeller within said compartment operating to create air flow over said evaporator, and air ducting defined by said skirt which includes a wall inwardly curved along its length and tapering towards a lower end of said skirt to direct said air flow from the evaporator in a path adjacent the ceiling within said cabinet.
Claim 3
Dependent Claim
33 words
A refrigeration unit according to claim 1, wherein the curvature of said wall is such that the path of the air flow substantially adheres to said curvature in compliance with the "Coanda" effect.
Claim 4
Dependent Claim
45 words
A refrigeration unit according to claim 1, wherein the spacing of said abutment means from the lower end of said skirt is such that said lower end of said skirt is flush with the cabinet ceiling when said refrigeration unit is installed on said cabinet.
Claim 5
Dependent Claim
21 words
A refrigeration unit according to claim 3, wherein said abutment means is provided by an outside peripheral rebate on said skirt.
Claim 6
Dependent Claim
35 words
A refrigeration unit according to claim 1, wherein said compartment is provided by an underside recess in said plug, and a vented cover encloses said compartment and forms an outer wall for said air ducting.
Claim 7
Dependent Claim
31 words
A refrigeration unit according to claim 1, wherein said air ducting comprises air ducts formed by the inner face of the skirt wall and provided at opposite parts of said plug.
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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) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |