Patent US1681254A successfully refreshed from Google Patents.
Patent US5511942A successfully refreshed from Google Patents.
US5511942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Axial mini ventilator with parabolic guide vanes
Assignee: MICRONEL AG ZURCHERSTRASSE 51 CH-8307 TAGELSWANGEN SWITZERLAND
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Filing: 1994-11-01
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Granted: 1996-04-30
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Expires: 2014-11-01
Abstract
Abstract An axial mini ventilator having an air conduction housing with an impeller wheel on the suction-side end of a tubular flow channel. Formed on the inside of the air conduction housing are air baffles which support the stator of an electric drive motor for the impeller wheel. The tip and/or root lines of the baffles are essentially segments of a parabola. The parabolas are oriented so that their point of origin is on the pressure-side end of the flow channel, and their plane of symmetry runs at right angles to the direction of flow. As a result of this configuration of the baffles, the turbulence in the flow channel can be reduced and the efficiency can be significantly increased.
Inventors
- 👤 Peter Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:38
CPC Classifications
F; F04; F04D; F04D19/00; F04D19/002; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/541; F04D29/542; F04D29/544
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
129 words
An axial mini ventilator comprising an air conduction housing with a ring-shaped flow channel having a suction-side end and a pressure-side end, an impeller wheel located on the suction-side end of the flow channel completely within the air conduction housing, a plurality of baffles extending radially in the flow channel in the air conduction housing and having curved tip and root lines, the tip and root lines of the baffles being both essentially segments of a parabola such that the baffles are radially twisted, whereby the point of origin of the coordinates of the parabola is located on the pressure-side end of the flow channel and the plane of symmetry of the parabola extends transversely to the direction of flow in the flow channel of the air conduction housing.
Claim 2
Dependent Claim
129 words
An axial mini ventilator comprising an air conduction housing with a ring-shaped flow channel having a suction-side end and a pressure-side end, an impeller wheel located on the suction-side end of the flow channel completely within the air conduction housing, a plurality of baffles extending radially in the flow channel in the air conduction housing and having curved tip and root lines, the tip and root lines of the baffles being both essentially segments of a parabola such that the baffles are radially twisted, whereby the point of origin of the coordinates of the parabola is located on the pressure-side end of the flow channel and the plane of symmetry of the parabola extends transversely to the direction of flow in the flow channel of the air conduction housing.
Claim 3
Dependent Claim
39 words
An axial mini ventilator as claimed in claim 1, wherein on the pressure-side end of the baffles, the angle β between the tangent to the baffle surface and the axis of symmetry of the parabola is 80° to 90°.
Claim 4
Dependent Claim
18 words
An axial mini ventilator as claimed in claim 1, wherein the air conduction housing has a tubular shape.
Claim 5
Dependent Claim
23 words
An axial mini ventilator as claimed in claim 1, wherein the length of the air conduction housing is greater than its outside diameter.
Claim 6
Dependent Claim
45 words
An axial mini ventilator as claimed in claim 4, wherein on the endpoints of the baffles close to the vanes, the angle α between the tangent to the baffle surface and the plane of symmetry of the parabola is between about 10° and about 60°.
Claim 7
Dependent Claim
39 words
An axial mini ventilator as claimed in claim 4, wherein on the pressure-side end of the baffles, the angle β between the tangent to the baffle surface and the axis of symmetry of the parabola is 80° to 90°.
Claim 8
Dependent Claim
29 words
An axial mini ventilator as claimed in claim 1, wherein the ratio of the diameter to the length of the housing is greater than 1:0.5 and less than 1:2.
Claim 9
Dependent Claim
39 words
An axial mini ventilator as claimed in claim 7, wherein on the pressure-side end of the baffles, the angle β between the tangent to the baffle surface and the axis of symmetry of the parabola is 80° to 90°.
Claim 10
Dependent Claim
45 words
An axial mini ventilator as claimed in claim 1, wherein on the endpoints of the baffles close to the vanes, the angle α between the tangent to the baffle surface and the plane of symmetry of the parabola is between about 10° and about 60°.
Claim 11
Dependent Claim
33 words
An axial mini ventilator as claimed in claim 9, wherein said angle α between the tangent to the baffle surface and the plane of symmetry of the parabola is between 20° and 45°.
Claim 12
Dependent Claim
16 words
An axial mini ventilator as claimed in claim 9, wherein the angle α is approximately 30°.
Claim 13
Dependent Claim
25 words
An axial mini ventilator as claimed in claim 1, wherein the baffles support a drive motor which is oriented coaxially within the air conduction housing.
Claim 14
Dependent Claim
23 words
An axial mini ventilator as claimed in claim 12, wherein the length of the air conduction housing is greater than its outside diameter.
Claim 15
Dependent Claim
45 words
An axial mini ventilator as claimed in claim 13, wherein on the endpoints of the baffles close to the vanes, the angle α between the tangent to the baffle surface and the plane of symmetry of the parabola is between about 10° and about 60°.
Claim 16
Dependent Claim
39 words
An axial mini ventilator as claimed in claim 13, wherein on the pressure-side end of the baffles, the angle β between the tangent to the baffle surface and the axis of symmetry of the parabola is 80° to 90°.
Claim 17
Dependent Claim
29 words
An axial mini ventilator as claimed in claim 12, wherein the ratio of the diameter to the length of the housing is greater than 1:0.5 and less than 1:2.
Claim 18
Dependent Claim
39 words
An axial mini ventilator as claimed in claim 16, wherein on the pressure-side end of the baffles, the angle β between the tangent to the baffle surface and the axis of symmetry of the parabola is 80° to 90°.
Claim 19
Dependent Claim
45 words
An axial mini ventilator as claimed in claim 12, wherein on the endpoints of the baffles close to the vanes, the angle α between the tangent to the baffle surface and the plane of symmetry of the parabola is between about 10° and about 60°.
Claim 20
Dependent Claim
39 words
An axial mini ventilator as claimed in claim 12, wherein on the pressure-side end of the baffles, the angle β between the tangent to the baffle surface and the axis of symmetry of the parabola is 80° to 90°.
Claim 21
Dependent Claim
18 words
An axial mini ventilator as claimed in claim 12, wherein the air conduction housing has a tubular shape.
References Cited (Backward Citations)
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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) | 1999-04-30 | 1999-10-30 | 2000-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-30 | 2003-10-30 | 2004-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-30 | 2007-10-30 | 2008-04-30 | $7700.00 | Window Closed / Lapsed |