Patent US4457672A successfully refreshed from Google Patents.
US4457672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan with variable axis impeller
Assignee: Mitsubishi Electric Corp
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Filing: 1981-12-10
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Granted: 1984-07-03
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Expires: 2001-12-10
Abstract
Abstract A fan assembly has a main body support and a mounting member which are inclined at a predetermined angle thus permitting the fan assembly to be mounted either adjacent to the upper edge of a wall or in a corner of a ceiling. A rotating grill disperses a current of air over a relatively wide area. The main body support has a groove which accommodates a mating engageable member of the mounting member thus permitting the fan assembly to be securely mounted to a wall or a ceiling.
Inventors
- 👤 Masato Ogura
- 👤 Noriyasu Horio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:58
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/10; F04D29/00; F04D29/60; F04D29/601; F04D29/70; F04D29/701; F04D29/703
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
141 words
A fan assembly comprising: a casing having a front surface and a rear surface which define an air passage therebetween; a first electric motor; an impeller adapted for rotation by said motor; a grill located over said front surface of said casing for altering a direction of a current of air produced by said impeller; a main body support located on said rear surface of said casing; and a mounting member for securing said fan assembly to a ceiling or wall; means for fixedly engaging said mounting member to said main body support in any one of a plurality of positions to prevent movement therebetween, said main body support and said mounting member having mating surfaces which are inclined at a predetermined angle, each of said predetermined positions defining a unique and fixed spacial orientation of an axis of said impeller.
Claim 2
Dependent Claim
141 words
A fan assembly comprising: a casing having a front surface and a rear surface which define an air passage therebetween; a first electric motor; an impeller adapted for rotation by said motor; a grill located over said front surface of said casing for altering a direction of a current of air produced by said impeller; a main body support located on said rear surface of said casing; and a mounting member for securing said fan assembly to a ceiling or wall; means for fixedly engaging said mounting member to said main body support in any one of a plurality of positions to prevent movement therebetween, said main body support and said mounting member having mating surfaces which are inclined at a predetermined angle, each of said predetermined positions defining a unique and fixed spacial orientation of an axis of said impeller.
Claim 3
Dependent Claim
70 words
The fan assembly as claimed in claim 1, further comprising motor mounting leg means located on said main body support, said first electric motor being secured to said motor mounting leg means, and a grill mounting leg for securing said grill to said front surface of said casing, said grill and said grill mounting leg being removably attached to said casing, and said impeller being removably attached to said motor.
Claim 4
Dependent Claim
38 words
The fan assembly as claimed in claim 1, wherein said rear surface of said casing has an arcuate groove of predetermined length therein, and said main body support includes an engaging member which is rotatable in said groove.
Claim 5
Dependent Claim
21 words
A fan as set forth in claim 3, wherein said groove and said engaging member have a predetermined radius of curvature.
Claim 6
Dependent Claim
70 words
The fan assembly as claimed in claim 3, further comprising motor mounting leg means located on said main body support, said first electric motor being secured to said motor mounting leg means, and a grill mounting leg for securing said grill to said front surface of said casing, said grill and said grill mounting leg being removably attached to said casing, and said impeller being removably attached to said motor.
Claim 7
Dependent Claim
23 words
The fan assembly as set forth in claim 1, further comprising a second electric motor mounted on said casing for rotating said grill.
Claim 8
Dependent Claim
19 words
The fan assembly as set forth in claim 6, wherein said mating surfaces are inclined at the same angle.
Claim 9
Dependent Claim
25 words
The fan assembly as set forth in claim 6, further comprising motor mounting leg means on said main body support for mounting said first motor.
Claim 10
Dependent Claim
68 words
The fan assembly as set forth in claim 1, 6, 7 or 8 wherein said fixedly engaging means comprises an L-shaped engaging member, and an engaging flange which is engaged with said engaging member, said engaging member being located on one of said main body support and said mounting member while the other of said main body support and said mounting member has said engaging flange located thereon.
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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) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |