US4743173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide beating unit for small size fan
Assignee: Papst Licensing GmbH and Co KG
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Filing: 1985-05-08
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Granted: 1988-05-10
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Expires: 2005-05-08
Abstract
Abstract A small fan which is constructed as compact axial fan with a central driving motor retained by way of a flange and a bearing support tube, and in which the housing of the fan forms a flow duct that surrounds the rotor; the bearing support of the shaft of the driving motor is constructed as one-piece slide bearing unit which is secured radially in an axial partial area of the bearing support tube by a sliding seat; the bearing support tube consists of a material which can be injection-molded.
Inventors
- 👤 Guenter Wrobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:03
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/167; H02K5/1675; H02K11/00; H02K11/30; H02K11/33
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
122 words
A small fan which is constructed as a compact axial fan, comprising a central driving motor means having a rotatable shaft retained by way of a flange means and a bearing support tube means, a rotor secured to the driving motor, and housing means for the fan forming a flow duct that surrounds the rotor, bearing support means for the shaft of the driving motor constructed as one-piece sliding bearing unit, said sliding bearing unit being radially fixed at least within an axial partial area of the bearing support tube means by a sliding seat, and wherein said sliding seat is obtained by a spring means acting to produce a bias force between the slide bearing unit and the bearing support tube.
Claim 2
Dependent Claim
122 words
A small fan which is constructed as a compact axial fan, comprising a central driving motor means having a rotatable shaft retained by way of a flange means and a bearing support tube means, a rotor secured to the driving motor, and housing means for the fan forming a flow duct that surrounds the rotor, bearing support means for the shaft of the driving motor constructed as one-piece sliding bearing unit, said sliding bearing unit being radially fixed at least within an axial partial area of the bearing support tube means by a sliding seat, and wherein said sliding seat is obtained by a spring means acting to produce a bias force between the slide bearing unit and the bearing support tube.
Claim 3
Dependent Claim
21 words
A small fan according to claim 1, wherein said bearing support tube means consists of a material that can be molded.
Claim 4
Dependent Claim
16 words
A small fan according to claim 2, wherein the driving motor is a collectorless d.c. motor.
Claim 5
Dependent Claim
57 words
A fan according to claim 1, wherein the spring means comprises a spring element in the form of a coil spring with square wire cross section, said spring axially abutting with pressure, on the one hand, against a surface of the bearing support tube means and, on the other, against a surface of the sliding bearing unit.
Claim 6
Dependent Claim
59 words
A fan according to claim 1, wherein the spring means comprises a coil spring having a round wire cross section, said spring axially abutting with pressure, on the one hand, against a surface of the bearing support tube means, and on the other, against a disk arranged between a surface of the sliding bearing unit and the coil spring.
Claim 7
Dependent Claim
54 words
A fan according to claim 1, wherein the spring means comprises a spring element in the form of a locking disk which, on the one hand, digs into the outer wall of the sliding bearing unit and, on the other hand, acts with axial pressure against a surface of the bearing support tube means.
Claim 8
Dependent Claim
28 words
A fan according to claim 1, wherein the sliding bearing unit includes at least one raised portion at the outer circumference of an extension having a larger diameter.
Claim 9
Dependent Claim
25 words
A fan according to claim 1, wherein the sliding bearing unit includes at least three raised portions at its plane surface abutting at a shoulder.
Claim 10
Dependent Claim
36 words
A fan according to claim 1, wherein the sliding bearing unit is axially pressed against a collar of the bearing support tube means by means of projections on a securing means acting on said spring means.
Claim 11
Dependent Claim
57 words
A fan according to claim 9, wherein the sliding bearing unit axially abuts, on the other hand, against a securing element and, on the other hand, is acted upon by the spring means comprising an axially effective spring which abuts on one side at the collar and presses on the other side against the sliding bearing unit.
Claim 12
Dependent Claim
15 words
A fan according to claim 1, wherein the driving motor is a collectorless d.c. motor.
Claim 13
Dependent Claim
17 words
A fan according to claim 11, wherein the d.c. motor is of the single pulse operation type.
Claim 14
Dependent Claim
16 words
A fan according to claim 11, wherein the d.c. motor is of the two-pulse operation type.
Claim 15
Dependent Claim
31 words
A fan according to claim 1, wherein the slide bearing unit is acted upon by the spring means axially against an abutment with the force of at least one spring element.
Claim 16
Dependent Claim
27 words
A fan according to claim 1, wherein the slide bearing unit is secured against axial displacement by a securing element which form-lockingly engages into its outer surface.
Claim 17
Dependent Claim
33 words
A fan according to claim 1, wherein the slide bearing unit is secured against axial displacement by way of an element which acts radially on the same by means of a force-locking connection.
Claim 18
Dependent Claim
35 words
A fan with a rotor hub according to claim 1, wherein the axial partial area is located in the area of one end of the bearing support tube means which is adjacent the rotor hub.
Claim 19
Dependent Claim
19 words
A fan according to claim 17, wherein said one end is adjacent the bottom of a bell-shaped external rotor.
Claim 20
Dependent Claim
33 words
A fan according to claim 17, wherein at least one of said spring means and a securing element is provided within the area of the other end of the bearing support tube means.
Claim 21
Dependent Claim
27 words
A fan according to claim 19, wherein said at least one of said spring means and securing element is provided on the other side of the flange.
Claim 22
Dependent Claim
23 words
A fan according to claim 1, wherein the partial area is located about in the axial center of the bearing support tube means.
Claim 23
Dependent Claim
36 words
A fan according to claim 1, wherein at least one of said spring means and a securing element is provided within the area of the end of the bearing support tube means axially opposite the flange.
Claim 24
Dependent Claim
26 words
A fan according to claim 21, wherein the partial area extends from about the center up to the opposite end of the bearing support tube means.
Claim 25
Dependent Claim
33 words
A fan according to claim 23, wherein a radial inwardly extending flange is provided at the opposite end of the bearing support tube means, on which the sliding bearing unit is axially supported.
Claim 26
Dependent Claim
28 words
A fan according to claim 24, wherein the slide bearing unit is axially supported at said flange under interposition of said spring means acting in an axially direction.
Claim 27
Dependent Claim
26 words
A fan according to claim 1, wherein the partial area is provided in the axial end area of the bearing support tube means adjacent the flange.
Claim 28
Dependent Claim
32 words
A fan according to claim 1, wherein the bearing support tube means is constructed as one-piece plastic injection-molded part together with the fan housing means by means of webs and the flange.
Claim 29
Dependent Claim
32 words
A fan according to claim 1, wherein the spring means axial abuts with pressure against a surface of the bearing support tube means and against a surface of the sliding bearing unit.
Claim 30
Dependent Claim
40 words
A fan according to claim 1, wherein the spring means axial abuts with pressure against a surface of the bearing support tube means and against a disk arranged between a surface of the sliding bearing unit and the spring means.
Claim 31
Dependent Claim
53 words
A fan according to claim 1, wherein the spring means comprises a spring element in the form of a locking disk which, on the one hand, digs into the outer wall of the sliding bearing unit and, on the other hand, acts with pressure against a surface of the bearing support tube means.
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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) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |