Patent US3701911A successfully refreshed from Google Patents.
US3701911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor bearing support and cooling means
Assignee: SKF Industrial Trading and Development Co BV
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Filing: 1971-05-20
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Granted: 1972-10-31
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Expires: 1991-05-20
Abstract
Abstract A bearing support for apparatus having a rotor mounted on a shaft and a stator having windings comprising a cup-shaped member consisting of an inner section for supporting rotor bearing means and an outer section secured at its outer periphery to the stator at a point radially inwardly of the windings and spaced from said rotor to define a rotor chamber, means defining a plurality of openings in the outer section of the cup-shaped member to provide an effectively cooling air flow to and from the rotor chamber upon relative rotation of the rotor and stator, the openings being of a configuration and orientation to direct the air over the windings and bearing means.
Inventors
- 👤 Stig Lennart Hallerback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:54
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/173; H02K5/1732; H02K5/15; H02K9/00; H02K9/02; H02K9/04; H02K9/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
114 words
A bearing support for apparatus having a rotor mounted on a shaft and a stator having windings comprising a cup-shaped member consisting of an inner section for supporting rotor bearing means and an outer section secured at its outer periphery to the stator at a point radially inwardly of the windings and spaced from said rotor to define a rotor chamber, means defining a plurality of openings in the outer section of the cup-shaped member to provide an effectively cooling air flow to and from the rotor chamber upon relative rotation of the rotor and stator, the openings being of a configuration and orientation to direct the air over the windings and bearing means.
Claim 2
Dependent Claim
114 words
A bearing support for apparatus having a rotor mounted on a shaft and a stator having windings comprising a cup-shaped member consisting of an inner section for supporting rotor bearing means and an outer section secured at its outer periphery to the stator at a point radially inwardly of the windings and spaced from said rotor to define a rotor chamber, means defining a plurality of openings in the outer section of the cup-shaped member to provide an effectively cooling air flow to and from the rotor chamber upon relative rotation of the rotor and stator, the openings being of a configuration and orientation to direct the air over the windings and bearing means.
Claim 3
Dependent Claim
126 words
A bearing support for apparatus having a rotor mounted on a shaft and a stator having windings comprising a cup-shaped member consisting of an inner section for supporting rotor bearing means and an outer section secured at its outer periphery to the stator at a point radially inwardly of the windings and spaced from said rotor to define a rotor chamber, said outer section including a pair of offset segments connected by a continuous circumferential wall portion, means defining a plurality of openings in each of said segments providing an effectively cooling air flow to and from the rotor chamber upon relative rotation of the rotor and stator, the openings being of a configuration and orientation to direct the air over the windings and bearing means.
Claim 4
Dependent Claim
126 words
A bearing support for apparatus having a rotor mounted on a shaft and a stator having windings comprising a cup-shaped member consisting of an inner section for supporting rotor bearing means and an outer section secured at its outer periphery to the stator at a point radially inwardly of the windings and spaced from said rotor to define a rotor chamber, said outer section including a pair of offset segments connected by a continuous circumferential wall portion, means defining a plurality of openings in each of said segments providing an effectively cooling air flow to and from the rotor chamber upon relative rotation of the rotor and stator, the openings being of a configuration and orientation to direct the air over the windings and bearing means.
Claim 5
Dependent Claim
35 words
A bearing support as claimed in claim 2 wherein said segments are of conical configuration and wherein the segment adjacent the bearing assembly is of a greater conicity than the conicity of the other segment.
Claim 6
Dependent Claim
16 words
A bearing support as claimed in claim 2 wherein the circumferential wall portion is reversely folded.
Claim 7
Dependent Claim
36 words
A bearing support as claimed in claim 2 wherein the outer section is of a configuration to accommodate projections from the end face of the rotor, said projections operable to circulate air in the rotor chamber.
Claim 8
Dependent Claim
54 words
A bearing support as claimed in claim 2 wherein said stator has separately wound poles and with at least one open section extending axially between the poles along the rotor and wherein the bearing support at these sections surrounds the end portions of the rotor, leaving a narrow gap between rotor and bearing support.
Claim 9
Dependent Claim
127 words
A bearing support for apparatus having a rotor mounted on a shaft and a stator having windings comprising a cup-shaped member consisting of an inner section for supporting rotor bearing means and an outer section secured at its outer periphery to the stator at a point radially inwardly of the windings and spaced from said rotor to define a rotor chamber, means defining a plurality of openings in the outer section of the cup-shaped member to provide an effectively cooling air flow to and from the rotor chamber upon relative rotation of the rotor and stator, the openings being of a configuration and orientation to direct the air over the windings and bearing means, the edges of said cooling openings being formed as guiding and directing surfaces.
Claim 10
Dependent Claim
127 words
A bearing support for apparatus having a rotor mounted on a shaft and a stator having windings comprising a cup-shaped member consisting of an inner section for supporting rotor bearing means and an outer section secured at its outer periphery to the stator at a point radially inwardly of the windings and spaced from said rotor to define a rotor chamber, means defining a plurality of openings in the outer section of the cup-shaped member to provide an effectively cooling air flow to and from the rotor chamber upon relative rotation of the rotor and stator, the openings being of a configuration and orientation to direct the air over the windings and bearing means, the edges of said cooling openings being formed as guiding and directing surfaces.
Claim 11
Dependent Claim
98 words
A bearing support as claimed in claim 7 wherein the guiding and directing surfaces of the cooling openings are made in such a way that a volume of air rotating inside the rotor chamber is conveyed out through the openings at one relative sense of rotation and conveyed in through the openings at the opposed relative sense of rotation, whereby, when a bearing support iS affixed at each end of an electric motor, the ambient cooling air is conveyed into and through one of the bearing supports, through the rotor chamber and out through the second bearing support.
Claim 12
Dependent Claim
128 words
A bearing support for apparatus having a rotor mounted on a shaft and a stator having windings comprising a cup-shaped member consisting of an inner section for supporting rotor bearing means and an outer section secured at its outer periphery to the stator at a point radially inwardly of the windings and spaced from said rotor to define a rotor chamber, means defining a plurality of openings in the outer section of the cup-shaped member to provide an effectively cooling air flow to and from the rotor chamber upon relative rotation of the rotor and stator, the openings being of a configuration and orientation to direct the air over the windings and bearing means, the edges of said cooling openings presenting oblique guiding surfaces for the cooling air.
Claim 13
Dependent Claim
128 words
A bearing support for apparatus having a rotor mounted on a shaft and a stator having windings comprising a cup-shaped member consisting of an inner section for supporting rotor bearing means and an outer section secured at its outer periphery to the stator at a point radially inwardly of the windings and spaced from said rotor to define a rotor chamber, means defining a plurality of openings in the outer section of the cup-shaped member to provide an effectively cooling air flow to and from the rotor chamber upon relative rotation of the rotor and stator, the openings being of a configuration and orientation to direct the air over the windings and bearing means, the edges of said cooling openings presenting oblique guiding surfaces for the cooling air.
Claim 14
Dependent Claim
35 words
A bearing support as claimed in claim 9 wherein wall portions in the vicinity of the openings in the form of tongues have been forced up or down from the material remaining between the openings.
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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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |