US3720914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motors
Assignee: SKF Industrial Trading and Development Co BV
•
Filing: 1971-07-14
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Granted: 1973-03-13
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Expires: 1991-07-14
Abstract
Abstract An electric flange motor particularly for driving circulation pumps for heating systems and having the mounting flange formed as an extension of a plastic moulding encapsulating the stator windings. The flange is provided with metallic fastening means lacking metallic connection with the stator core, to minimize the transmission of heat from the pump to the motor. Rotor bearing support means are supported by the stator core independently of the plastic moulding.
Inventors
- 👤 S Hallerback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:57
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/173; H02K5/1732; H02K9/00; H02K9/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
138 words
An electric motor comprising a stator and a rotor and provided with cup-shaped bearing support means, said bearing support means being by its larger end secured relative to the stator radially inside the end coils of the stator windings and accommodating a rotor bearing at its smaller end, the end coils of the stator windings being embedded in a plastic moulding forming an extension of the stator core and bonded to the latter, characterized in that the said plastic moulding is enlarged and formed into mounting means for the motor, and is provided with metallic fastening means, such as sheet metal elements, lacking metallic connection with the stator core, the bearing support means being supported by the stator core independently of the plastic moulding so as to be unaffected by any deformations and dimensional variations of the latter.
Claim 2
Dependent Claim
138 words
An electric motor comprising a stator and a rotor and provided with cup-shaped bearing support means, said bearing support means being by its larger end secured relative to the stator radially inside the end coils of the stator windings and accommodating a rotor bearing at its smaller end, the end coils of the stator windings being embedded in a plastic moulding forming an extension of the stator core and bonded to the latter, characterized in that the said plastic moulding is enlarged and formed into mounting means for the motor, and is provided with metallic fastening means, such as sheet metal elements, lacking metallic connection with the stator core, the bearing support means being supported by the stator core independently of the plastic moulding so as to be unaffected by any deformations and dimensional variations of the latter.
Claim 3
Dependent Claim
138 words
An electric motor comprising a stator and a rotor and provided with cup-shaped bearing support means, said bearing support means being by its larger end secured relative to the stator radially inside the end coils of the stator windings and accommodating a rotor bearing at its smaller end, the end coils of the stator windings being embedded in a plastic moulding forming an extension of the stator core and bonded to the latter, characterized in that the said plastic moulding is enlarged and formed into mounting means for the motor, and is provided with metallic fastening means, such as sheet metal elements, lacking metallic connection with the stator core, the bearing support means being supported by the stator core independently of the plastic moulding so as to be unaffected by any deformations and dimensional variations of the latter.
Claim 4
Dependent Claim
138 words
An electric motor comprising a stator and a rotor and provided with cup-shaped bearing support means, said bearing support means being by its larger end secured relative to the stator radially inside the end coils of the stator windings and accommodating a rotor bearing at its smaller end, the end coils of the stator windings being embedded in a plastic moulding forming an extension of the stator core and bonded to the latter, characterized in that the said plastic moulding is enlarged and formed into mounting means for the motor, and is provided with metallic fastening means, such as sheet metal elements, lacking metallic connection with the stator core, the bearing support means being supported by the stator core independently of the plastic moulding so as to be unaffected by any deformations and dimensional variations of the latter.
Claim 5
Dependent Claim
24 words
An electric motor according to claim 1, characterized in that the mounting means for the motor are shaped into a substantially frusto-conical mounting flange.
Claim 6
Dependent Claim
37 words
An electric motor according to claim 2, characterized in that the mounTing flange and/or the fastening means are formed and arranged so as to admit of a heat-insulating connection with machinery to be driven by the motor.
Claim 7
Dependent Claim
38 words
An electric motor according to claim 3, characterized in that the mounting flange and/or the fastening means is provided with but a small member and/or small surface area for connecting the motor to machinery to be driven thereby.
Claim 8
Dependent Claim
36 words
An electric motor as claimed in claim 1 wherein said mounting means comprises a frusto-conical flange and said fastening means is mounted at the large end of said frusto-conical flange and forms a cup-shaped base member.
Claim 9
Dependent Claim
24 words
An electric motor as claimed in claim 5 wherein the base member is provided with metallic cooling surfaces in contact with the ambient air.
Claim 10
Dependent Claim
27 words
An electric motor as claimed in claim 1 wherein the mounting means comprises a frusto-conical flange and including a plurality of cooling air openings in said flange.
Claim 11
Dependent Claim
21 words
An electric motor as claimed in claim 7 wherein said flange is provided with a plurality of circumferentially spaced stiffening ribs.
Claim 12
Dependent Claim
58 words
An electric motor as claimed in claim 1 wherein said bearing supports are provided with cool air openings and wherein said mounting means is provided with cooling holes and said stator is designed to generate a cooling air flow into and through the rotor chamber through the air openings and holes in the bearing supports and mounting flange.
References Cited (Backward Citations)
US3042820A
Cited
US3194166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |