US4345874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust fan with protective band
Assignee: Toshiba Corp
•
Filing: 1980-02-26
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Granted: 1982-08-24
•
Expires: 2000-02-26
Abstract
Abstract An exhaust fan comprising rotatable fan blades, a motor for rotating the blades, a case for mounting and surrounding the blades, and a band detachably disposed and surrounding the case for permitting removal of a coating film from the case, the film being a coating for covering the case and the band for protecting the case from dirt, especially cooking grease.
Inventors
- 👤 Kenichi Ozeki
- 👤 Takashi Fushimi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:49
CPC Classifications
B; B08; B08B; B08B17/00; B08B17/02; B08B17/04; F; F04; F04D; F04D29/00; F04D29/02; F04D29/023; F04D29/70; F04D29/701; F05; F05D; F05D2230/00; F05D2230/72; F05D2230/80; F05D2230/90; F05D2300/00; F05D2300/40; F05D2300/43
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
58 words
An exhaust fan comprising: rotatable blades; drive means for rotating said rotatable blades; a case for mounting and surrounding at least said rotatable blades; band means detachable disposed and surrounding said case so as to protrude therefrom for removing a coating film therewith, said film covering said case and said band means for protecting said case from dirt.
Claim 2
Dependent Claim
58 words
An exhaust fan comprising: rotatable blades; drive means for rotating said rotatable blades; a case for mounting and surrounding at least said rotatable blades; band means detachable disposed and surrounding said case so as to protrude therefrom for removing a coating film therewith, said film covering said case and said band means for protecting said case from dirt.
Claim 3
Dependent Claim
65 words
An exhaust fan comprising: rotatable blades; drive means for rotating said rotatable blades; a case for mounting and surrounding at least said rotatable blades; and band means detachable disposed and surrounding said case for removing a coating film therewith, said film covering said case and said band means for protecting said case from dirt, said bands being connected with each other by a stretchable material.
Claim 4
Dependent Claim
65 words
An exhaust fan comprising: rotatable blades; drive means for rotating said rotatable blades; a case for mounting and surrounding at least said rotatable blades; and band means detachable disposed and surrounding said case for removing a coating film therewith, said film covering said case and said band means for protecting said case from dirt, said bands being connected with each other by a stretchable material.
Claim 5
Dependent Claim
76 words
An exhaust fan comprising: rotatable blades; drive means for rotating said rotatable blades; a case for mounting and surrounding at least said rotatable blades; band means detachable disposed and surrounding said case for removing a coating film therewith, said film covering said case and said band means for protecting said case from dirt, and a grease collector located in the lower part of said case for receiving grease and covering the ends of said band means.
Claim 6
Dependent Claim
76 words
An exhaust fan comprising: rotatable blades; drive means for rotating said rotatable blades; a case for mounting and surrounding at least said rotatable blades; band means detachable disposed and surrounding said case for removing a coating film therewith, said film covering said case and said band means for protecting said case from dirt, and a grease collector located in the lower part of said case for receiving grease and covering the ends of said band means.
Claim 7
Dependent Claim
67 words
An exhaust fan comprising: rotatable blades; drive means for rotating said rotatable blades; a case for mounting and surrounding at least said rotatable blades; and band means detachably disposed and surrounding said case for removing a coating film therewith, said film covering said case and said band means for protecting said case from dirt, said case including two bosses for securing each end of said band means.
Claim 8
Dependent Claim
67 words
An exhaust fan comprising: rotatable blades; drive means for rotating said rotatable blades; a case for mounting and surrounding at least said rotatable blades; and band means detachably disposed and surrounding said case for removing a coating film therewith, said film covering said case and said band means for protecting said case from dirt, said case including two bosses for securing each end of said band means.
Claim 9
Dependent Claim
40 words
The exhaust fan as in claim 4 wherein said band means is so formed as to contact the surface of said case and to form a space between said surface of said case and a part of said band means.
Claim 10
Dependent Claim
76 words
An exhaust fan comprising: rotatable blades; drive means for rotating said rotatable blades; a case for mounting and surrounding at least said rotatable blades; band means detachably disposed in contact with and surrounding said case for removing a coating film therewith, said film covering said case and said band means for protecting said case from dirt, and said band means forming a space between said surface of said case and a part of said band means.
Claim 11
Dependent Claim
76 words
An exhaust fan comprising: rotatable blades; drive means for rotating said rotatable blades; a case for mounting and surrounding at least said rotatable blades; band means detachably disposed in contact with and surrounding said case for removing a coating film therewith, said film covering said case and said band means for protecting said case from dirt, and said band means forming a space between said surface of said case and a part of said band means.
Claim 12
Dependent Claim
20 words
The exhaust fan as in claim 6, wherein said case includes means for securing the ends of said band means.
Claim 13
Dependent Claim
29 words
The exhaust fan as in claim 6, wherein said case includes a projection which is formed on the surface of said case for preventing slippage of said band means.
Claim 14
Dependent Claim
23 words
The exhaust fan as in claim 6, wherein the ends of said band means are connected with each other by a stretchable material.
Claim 15
Dependent Claim
15 words
The exhaust fan as in claim 6, a section of said band means being E-shaped.
Claim 16
Dependent Claim
24 words
The exhaust fan as in claim 6, 7, or 4 wherein said band means is disposed to protrude from the end of said case.
Claim 17
Dependent Claim
77 words
An exhaust fan comprising: rotatable blades; drive means for rotating said rotatable blades; drive means for rotating said rotatable blades; a case for mounting and surrounding at least said rotatable blades including a projection formed on a surface thereof; band means detachably disposed and surrounding said case for removing a coating film therewith, said film covering said case and said band means for protecting said case from dirt, said band means engaging said projection to prevent slippage.
Claim 18
Dependent Claim
77 words
An exhaust fan comprising: rotatable blades; drive means for rotating said rotatable blades; drive means for rotating said rotatable blades; a case for mounting and surrounding at least said rotatable blades including a projection formed on a surface thereof; band means detachably disposed and surrounding said case for removing a coating film therewith, said film covering said case and said band means for protecting said case from dirt, said band means engaging said projection to prevent slippage.
Claim 19
Dependent Claim
21 words
The exhaust fan as in claim 6, 7, 4, 8 or 12 wherein said band means is made of elastic material.
Claim 20
Dependent Claim
15 words
The exhaust fan as in claim 13, wherein said band means is made from rubber.
Claim 21
Dependent Claim
39 words
The exhaust fan as in claim 6, 7, 4, 12, 8, or 9 further comprising a grease collector which is located in the lower part of said case for receiving grease and covering the end of said band means.
Claim 22
Dependent Claim
41 words
The exhaust fan as in claim 6, 7, 4, 8, 12 or 9, wherein said case further comprises a bellmouth which is formed by surrounding said fan blades, and said exhaust fan is driven for exhausting the air from a room.
References Cited (Backward Citations)
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Cited
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US2802595A
Cited
US3620796A
Cited
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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) | 1985-08-23 | 1986-02-22 | 1986-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-23 | 1990-02-22 | 1990-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-23 | 1994-02-22 | 1994-08-24 | $7700.00 | Window Closed / Lapsed |