US4866320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan assembly
Assignee: Aurora Konrad G Schulz GmbH and Co KG
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Filing: 1988-08-26
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Granted: 1989-09-12
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Expires: 2008-08-26
Abstract
Abstract A fan assembly that includes an impeller driven by an electric motor. The housing for the impeller has an air intake opening and a pressure-side connection for the discharge of air, with the pressure-side connection being provided with an air inlet opening that communicates with an air conduit that in turn leads to the electric motor housing. Air that flows through the air conduit is supplied at least to the region of the commutator of the electric motor. The electric motor housing is provided with an air outlet opening for receiving air that has been supplied to the electric motor housing via the air conduit, with this air outlet opening being in flow communication with an underpressure region of the impeller remote from the pressure-side connection of the impeller housing.
Inventors
- 👤 Joachim Schulz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:01
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/082; F04D29/00; F04D29/58; F04D29/5806; H; H02; H02K; H02K9/00; H02K9/02; H02K9/04; H02K9/06; H02K9/28
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
151 words
A fan assembly that includes an impeller driven by an electric motor that is disposed in a housing and has a commutator, said fan assembly further comprising: a housing for said impeller, with said impeller housing having an air intake opening and a pressure-side connection for the discharge of air, with said pressure-side connection being provided with an air inlet opening that communicates with an air conduit that in turn leads to said electric motor housing, with air that flows through said air conduit being supplied at least to the region of said commutator of said electric motor; said electric motor housing is provided with air outlet opening means for receiving air that has been supplied to said electric motor housing via said air conduit, with said air outlet opening means being in flow communication with an underpressure region of said impeller remote from said pressure-side connection of said impeller housing.
Claim 2
Dependent Claim
151 words
A fan assembly that includes an impeller driven by an electric motor that is disposed in a housing and has a commutator, said fan assembly further comprising: a housing for said impeller, with said impeller housing having an air intake opening and a pressure-side connection for the discharge of air, with said pressure-side connection being provided with an air inlet opening that communicates with an air conduit that in turn leads to said electric motor housing, with air that flows through said air conduit being supplied at least to the region of said commutator of said electric motor; said electric motor housing is provided with air outlet opening means for receiving air that has been supplied to said electric motor housing via said air conduit, with said air outlet opening means being in flow communication with an underpressure region of said impeller remote from said pressure-side connection of said impeller housing.
Claim 3
Dependent Claim
45 words
A fan assembly according to claim 1, in which said pressure-side connection has a cross-sectional flow area that is greater than that of a discharge of said impeller; and in which said air inlet opening is disposed in a side wall of said pressure-side connection.
Claim 4
Dependent Claim
44 words
A fan assembly according to claim 1, in which said air inlet opening is disposed in a side of said pressure-side connection in such a way that there is no undercut; and in which said air conduit is integrally embodied with said pressure-side connection.
Claim 5
Dependent Claim
40 words
A fan assembly according to claim 1, in which said pressure-side connection is provided with a flange that in an installed state of said fan assembly is convered by a sealing member that then forms part of said air conduit.
Claim 6
Dependent Claim
34 words
A fan assembly according to claim 1, in which said air outlet opening means includes an air outlet conduit that extends into a region of maximum underpressure on the underpressure side of said impeller.
Claim 7
Dependent Claim
17 words
A fan assembly according to claim 5, in which said air outlet conduit is a rubber hose.
Claim 8
Dependent Claim
17 words
A fan assembly according to claim 5, in which said air outlet conduit is a plastic tube.
Claim 9
Dependent Claim
50 words
A fan assembly according to claim 5, in which said air conduit is connected to a side of said electric motor housing adjacent said commutator, and said air outlet conduit is connected to said electric motor housing, relative to said commutator, diagonally across from where said air conduit is connected.
Claim 10
Dependent Claim
24 words
A fan assembly according to claim 8, in which said commutator is disposed on a side of said electric motor that faces said impeller.
Claim 11
Dependent Claim
48 words
A fan assembly according to claim 1, in which said air outlet opening means is disposed in an end wall of said electric motor housing, with said air conduit being connected to a side of said electric motor housing in the immediate vicinity of said end wall thereof.
Claim 12
Dependent Claim
59 words
A fan assembly according to claim 1, which includes further air entry means disposed on a side of said electric motor housing remote from said commutator, with resistance to flow between said further air entry means and said air outlet opening means being considerably greater than resistance to flow between said air conduit and said air outlet opening means.
Claim 13
Dependent Claim
13 words
A fan assembly according to claim 1, which is a radial-flow fan assembly.
Claim 14
Dependent Claim
13 words
A fan assembly according to claim 1, which is a transverse-flow fan assembly.
Claim 15
Dependent Claim
16 words
A fan assembly according to claim 1, which is in the form of a drum rotor.
Claim 16
Dependent Claim
16 words
A fan assembly according to claim 1, which is in the form of an axial rotor.
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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |