US3923355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cabinet construction for a refrigerator
Assignee: White Westinghouse Corp
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Filing: 1974-06-14
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Granted: 1975-12-02
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Expires: 1994-06-14
Abstract
Abstract A refrigerator having a metal outer wrapper separated from a plastic inner liner by foamed-in-placed insulation is shown wherein the inner liner is selectively coated on the surface adjacent the insulation and in areas corresponding to points of stress concentration by a release agent (PVA) with the entire surface facing the foam insulation thereafter coated with an elastomeric adhesive material (latex) providing mimimal bonding between the insulation and plastic liner in those areas of stress concentration and an elastomeric interface between the plastic liner and the foam insulation to reduce the forces transmitted to the plastic liner as a result of the different rates of expansion or contraction of the inner liner and the outer shell.
Inventors
- 👤 Charles W Dietterich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:58
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/065; F; F25; F25D; F25D23/00; F25D23/06; B32B15/00; B32B15/04; B32B15/046; B32B7/00; B32B7/04; B32B7/12; B32B2255/00; B32B2255/26; B32B2509/00; B32B2509/10; Y; Y10; Y10S; Y10S220/00; Y10S220/902
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
143 words
A refrigerator cabinet having a laminated wall construction including an outer metal layer, an inner plastic layer having predetermined areas therein susceptible to stress concentration when said plastic layer is subjected to tensioning forces, an intermediate core of foamed insulation adherent to one of said layers substantially throughout the interface between said insulation and said one of said layers, a coating of a release agent interposed between said insulation and the other of said layers in predetermined areas generally coextensive with at least certain of said areas susceptible to stress concentration and, a coating of an elastomeric adhesive interposed between said insulation and said other of said layers substantially throughout the extent of at least the remaining interface of said insulation and said other of said layers whereby limited movement of said other of said layers with respect to said insulation is permitted.
Claim 2
Dependent Claim
143 words
A refrigerator cabinet having a laminated wall construction including an outer metal layer, an inner plastic layer having predetermined areas therein susceptible to stress concentration when said plastic layer is subjected to tensioning forces, an intermediate core of foamed insulation adherent to one of said layers substantially throughout the interface between said insulation and said one of said layers, a coating of a release agent interposed between said insulation and the other of said layers in predetermined areas generally coextensive with at least certain of said areas susceptible to stress concentration and, a coating of an elastomeric adhesive interposed between said insulation and said other of said layers substantially throughout the extent of at least the remaining interface of said insulation and said other of said layers whereby limited movement of said other of said layers with respect to said insulation is permitted.
Claim 3
Dependent Claim
29 words
A refrigerator cabinet according to claim 1 wherein said one of said layers is said outer metal layer and said other of said layers is said inner plastic layer.
Claim 4
Dependent Claim
15 words
A refrigerator cabinet according to claim 2 wherein said release agent is a polyvinyl alcohol.
Claim 5
Dependent Claim
14 words
A refrigerator cabinet according to claim 2 wherein said elastomeric adhesive is a latex.
Claim 6
Dependent Claim
31 words
A refrigerator cabinet according to claim 2 wherein said coating of said elastomeric adhesive extends over areas on said inner plastic layer including said predetermined areas coated by said release agent.
Claim 7
Dependent Claim
99 words
An improved cabinet construction for a refrigerator having an outer metal wrapper and a molded plastic inner liner separated by a core of foamed-in-place insulation, and wherein said liner includes predetermined areas susceptible to stress concentration when said liner is subjected to tensioning forces, said improvement comprising: a first parting agent selectively applied to predetermined areas on the surface of said inner liner facing said insulation generally coextensive with said areas susceptible to stress concentration; and, a second parting agent having elastomeric adhesive characteristics applied to substantially at least the remaining surface of said inner liner facing said insulation.
Claim 8
Dependent Claim
99 words
An improved cabinet construction for a refrigerator having an outer metal wrapper and a molded plastic inner liner separated by a core of foamed-in-place insulation, and wherein said liner includes predetermined areas susceptible to stress concentration when said liner is subjected to tensioning forces, said improvement comprising: a first parting agent selectively applied to predetermined areas on the surface of said inner liner facing said insulation generally coextensive with said areas susceptible to stress concentration; and, a second parting agent having elastomeric adhesive characteristics applied to substantially at least the remaining surface of said inner liner facing said insulation.
Claim 9
Dependent Claim
14 words
Structure according to claim 6 wherein said first parting agent is a polyvinyl alcohol.
Claim 10
Dependent Claim
13 words
Structure according to claim 6 wherein said second parting agent is a latex.
Claim 11
Dependent Claim
30 words
Structure according to claim 6 wherein said second parting agent is applied generally throughout the interface between said inner liner and said insulation including said areas susceptible to stress concentration.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |