US3940195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration cabinet
Assignee: Whirlpool Corp
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Filing: 1974-10-11
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Granted: 1976-02-24
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Expires: 1994-10-11
Abstract
Abstract A freezer or refrigerator cabinet having an outer shell for strength and rigidity, a relatively thin plastic liner spaced from the shell to provide an insulating space therebetween with the liner having a projecting portion extending into the insulation space such as one providing a socket for receiving a shelf retainer projection, a thin parting agent sheet enveloping the projecting portion on the side that is within the insulation space with this sheet having an edge area spaced from the projecting portion and attached to the liner so that the sheet encloses the projecting portion and the immediately adjacent portions of the liner to prevent adherent cast resin foam insulation in the space between the shell and the liner from tightly gripping the projecting portion.
Inventors
- 👤 Harry Lucian Tillman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:38
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/06; F25D23/065; F25D23/067; F25D23/062; F25D23/064; Y; Y10; Y10S; Y10S220/00; Y10S220/902
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
92 words
A refrigeration cabinet comprising: an outer shell; a relatively thin plastic liner spaced from said shell to provide an insulating space therebetween, said liner having a projecting portion extending into said insulating space; cast resin foam insulation filling said insulating space between said shell and liner; and a thin parting agent sheet overlying said projecting portion and having an edge area spaced from said projecting portion and attached to said liner to define a surrounding space about said projecting portion for preventing said cast resin foam from closely embracing said projecting portion.
Claim 2
Dependent Claim
92 words
A refrigeration cabinet comprising: an outer shell; a relatively thin plastic liner spaced from said shell to provide an insulating space therebetween, said liner having a projecting portion extending into said insulating space; cast resin foam insulation filling said insulating space between said shell and liner; and a thin parting agent sheet overlying said projecting portion and having an edge area spaced from said projecting portion and attached to said liner to define a surrounding space about said projecting portion for preventing said cast resin foam from closely embracing said projecting portion.
Claim 3
Dependent Claim
15 words
The cabinet of claim 1 wherein said parting agent sheet comprises a flexible polymeric material.
Claim 4
Dependent Claim
37 words
The cabinet of claim 1 wherein said sheet is taut and encloses an air space operating as a resilient cushion space permitting relative movement between the liner and the insulation in the area of said projecting portion.
Claim 5
Dependent Claim
17 words
The cabinet of claim 1 wherein said projecting portion forms a well for receiving shelf retainer means.
Claim 6
Dependent Claim
51 words
The cabinet of claim 1 wherein said parting agent sheet comprises a flexible adhesive backed polymeric material and wherein said sheet is taut and encloses resiliently an air space operating as a resilient cushion space permitting relative movement between the liner and the insulation in the area of said projecting portion.
Claim 7
Independent Claim
116 words
The method of making a refrigeration cabinet, comprising: providing an outer cabinet shell; providing a relatively thin plastic liner spaced from the shell defining an insulation space therebetween, the liner having a projecting portion that projects into said space; enclosing said projection on the surface of said liner that faces said insulation space with a thin parting material sheet by attaching a peripheral portion of said sheet to the inner liner surface at a peripherally closed area spaced from and surrounding said projection to provide a resilient cushion space between the liner and the sheet and to enclose said projection; and applying a cast resin foam insulation in said space between the shell and the liner.
Claim 8
Independent Claim
116 words
The method of making a refrigeration cabinet, comprising: providing an outer cabinet shell; providing a relatively thin plastic liner spaced from the shell defining an insulation space therebetween, the liner having a projecting portion that projects into said space; enclosing said projection on the surface of said liner that faces said insulation space with a thin parting material sheet by attaching a peripheral portion of said sheet to the inner liner surface at a peripherally closed area spaced from and surrounding said projection to provide a resilient cushion space between the liner and the sheet and to enclose said projection; and applying a cast resin foam insulation in said space between the shell and the liner.
Claim 9
Dependent Claim
19 words
The method of claim 6 wherein said parting agent sheet is tautly drawn over said projection in said attaching.
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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |