US4287943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat insulating box
Assignee: Shimano Inc
•
Filing: 1979-06-28
•
Granted: 1981-09-08
•
Expires: 1999-06-28
Abstract
Abstract A heat insulating box comprises a body and lid of adiabatic construction, and at least one radiator housed within a space between the body and the lid and providing a heat insulating space. The radiator is filled with a high temperature liquid, such as hot water, which liquid serves as a heat source to heat and keep warm the contents, such as lunch, within the heat insulating space, so that the contents may be kept at a desired temperature for a prolonged period of time.
Inventors
- 👤 Masashi Hotta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:02
CPC Classifications
A; A45; A45C; A45C11/00; A45C11/20; F; F25; F25D; F25D3/00; F25D2303/00; F25D2303/08; F25D2303/082; F25D2303/0822; F25D2303/08222; F25D2303/084; F25D2303/0843; F25D2331/00; F25D2331/80; F25D2331/804
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
An insulating box comprising a box body having an opening, a lid hingedly supported to said box body for closing said opening to form a space between said lid and said box body, releasable means for retaining said lid closed over said opening, and a radiator housed within said space, said box body and lid having an adiabatic construction, said radiator being smaller in size than said space so that when said radiator is housed within said space, a temperature retention space is defined by said radiator, box body and lid for keeping objects therein at a constant temperature, said radiator comprising a hollow and sealed container of heat resistant material having an intake for liquid and a cap closing said intake, and having a frame-like shape encircling said temperature retention space, said radiator intake projecting through an opening of said box body such that said cap is accessable from the exterior of said body.
Claim 2
Dependent Claim
155 words
An insulating box comprising a box body having an opening, a lid hingedly supported to said box body for closing said opening to form a space between said lid and said box body, releasable means for retaining said lid closed over said opening, and a radiator housed within said space, said box body and lid having an adiabatic construction, said radiator being smaller in size than said space so that when said radiator is housed within said space, a temperature retention space is defined by said radiator, box body and lid for keeping objects therein at a constant temperature, said radiator comprising a hollow and sealed container of heat resistant material having an intake for liquid and a cap closing said intake, and having a frame-like shape encircling said temperature retention space, said radiator intake projecting through an opening of said box body such that said cap is accessable from the exterior of said body.
Claim 3
Dependent Claim
30 words
An insulating box according to claim 1, wherein an adiabatic space is provided between the outer surface of said frame-like shape radiator and the inner surface of said box body.
Claim 4
Dependent Claim
17 words
An insulating box according to claim 2, wherein said adiabatic space is filled with heat accumulation material.
Claim 5
Dependent Claim
34 words
An insulating box according to claim 1, wherein the surface of said radiator opposite to said heat insulating space is formed of material having better heat transfer characteristics than other surfaces of said radiator.
References Cited (Backward Citations)
US1369367A
Cited
AU246737A
Cited
GB511685A
Cited
US2215274A
Cited
US2496296A
Cited
FR1266787A
Cited
US3807194A
Cited
US3802220A
Cited
US4145895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |