Patent US4820903A successfully refreshed from Google Patents.
US4820903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closed type heating apparatus
Assignee: Individual
•
Filing: 1988-02-05
•
Granted: 1989-04-11
•
Expires: 2008-02-05
Abstract
Abstract A closed type heating apparatus including a base plate to be placed on a floor or a bed, a space defining member having supports in the form of a pillar; a straight wall or a curved wall and an upper plate having a number of openings formed therein; and a heat conducting top plate placed on the upper plate. By combining different kinds of supports, there is formed a desired air passage within a closed space formed by the base plate and the upper plate. A heater unit including a ceramic heater and a blower is arranged in the air passage to generate a heated air stream such that the heating apparatus produces a desired temperature distribution.
Inventors
- 👤 Goro Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:27
CPC Classifications
A; A47; A47C; A47C21/00; A47C21/04; A47C21/048; F; F24; F24D; F24D13/00; F24D13/02; F24D13/022; F24D5/00; F24D5/06; F24D5/10; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
93 words
A closed type heating apparatus comprising: a base plate; at least one space defining member including a top plate having a number of openings and a supporting means for supporting the top plate on the base plate, said base plate and said space defining member being coupled with each other to form a closed space; means for heating air inside the closed space; and means for circulating the air heated by said heating means within said closed space; wherein said supporting means includes a pillar and a fin rotatably secured to said pillar.
Claim 2
Dependent Claim
93 words
A closed type heating apparatus comprising: a base plate; at least one space defining member including a top plate having a number of openings and a supporting means for supporting the top plate on the base plate, said base plate and said space defining member being coupled with each other to form a closed space; means for heating air inside the closed space; and means for circulating the air heated by said heating means within said closed space; wherein said supporting means includes a pillar and a fin rotatably secured to said pillar.
Claim 3
Dependent Claim
104 words
A closed type heating apparatus comprising: a base plate having side edges; a top plate being arranged parallel to the base plate and also having side edges; means for forming a closed flat space together with the base plate and the top plate; means, arranged within the closed flat space, for forming at least one air circulating passage in a closed path within the closed flat space; a means, arranged within the air circulating passage, for heating the air within the circulating passage; and a means, arranged within the air circulating passage, for circulating the air through the circulating passage in the closed path.
Claim 4
Dependent Claim
104 words
A closed type heating apparatus comprising: a base plate having side edges; a top plate being arranged parallel to the base plate and also having side edges; means for forming a closed flat space together with the base plate and the top plate; means, arranged within the closed flat space, for forming at least one air circulating passage in a closed path within the closed flat space; a means, arranged within the air circulating passage, for heating the air within the circulating passage; and a means, arranged within the air circulating passage, for circulating the air through the circulating passage in the closed path.
Claim 5
Dependent Claim
29 words
An apparatus according to claim 2, further comprising: a side wall secured to the side edges of the base plate and to the side edges of the top plate.
Claim 6
Dependent Claim
18 words
An apparatus according to claim 2, further comprising: means for supporting the top plate on the base plate.
Claim 7
Dependent Claim
15 words
An apparatus according to claim 4, wherein said supporting means is formed as a pillar.
Claim 8
Dependent Claim
16 words
An apparatus according to claim 4, wherein said supporting means is formed as a straight wall.
Claim 9
Dependent Claim
16 words
An apparatus according to claim 4, wherein said supporting means is formed as a curved wall.
Claim 10
Dependent Claim
17 words
An apparatus according to claim 4, wherein said top plate and said supporting means are formed integrally.
Claim 11
Dependent Claim
23 words
An apparatus according to claim 8, wherein said top plate and said supporting means are formed integrally by a mold of synthetic resin.
Claim 12
Dependent Claim
24 words
An apparatus according to claim 8, wherein said top plate and said supporting means are formed integrally by a die casting of metal alloy.
Claim 13
Dependent Claim
25 words
An apparatus according to claim 2, wherein a plurality of said forming means are arranged in a matrix between top plate and the base plate.
Claim 14
Dependent Claim
17 words
An apparatus according to claim 11, wherein said plurality of forming means include supports having different shapes.
Claim 15
Dependent Claim
20 words
An apparatus according to claim 2, wherein said top plate has a plurality of recesses formed in a surface thereof.
Claim 16
Dependent Claim
14 words
An apparatus according to claim 2, wherein said heating means is a ceramic heater.
Claim 17
Dependent Claim
13 words
An apparatus according to claim 14, wherein said circulating means is a blower.
Claim 18
Dependent Claim
25 words
An apparatus according to claim 15, wherein said ceramic heater and said blower are provided in a flat box arranged within the air circulating passage.
Claim 19
Dependent Claim
26 words
An apparatus according to claim 2, wherein a plurality of the forming means is arranged in a matrix between the base plate and the top plate.
References Cited (Backward Citations)
CH76530A
Cited
US2493067A
Cited
US2573455A
Cited
US2659803A
Cited
US3230556A
Cited
US3162488A
Cited
GB1030420A
Cited
DE1910954A1
Cited
US3681797A
Cited
GB2032269A
Cited
US4563387A
Cited
US4703153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |