US3648086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starter generator construction
Assignee: General Electric Co
•
Filing: 1968-08-07
•
Granted: 1972-03-07
•
Expires: 1988-08-07
Abstract
Abstract A dynamoelectric machine which is comprised of a stator, a rotor which includes an armature and a commutator, a brush rigging associated with said commutator, and a pair of fans for directing cooling air through the stator, rotor, and brush rigging. Radial baffles are provided to more effectively cool the commutator area; a combined bearing support and air baffle aids cooling of a bearing which rotatably supports the rotor; and a foam-filled shroud surrounds the tips of the fan blades to increase the effectiveness thereof.
Inventors
- 👤 Charles F Renner
- 👤 Norman J Lipstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:05
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/02; H02K9/04; H02K9/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
In a dynamoelectric machine which includes a stator, a rotor rotatably supported by a plurality of bearings and including an armature and a commutator, a brush rigging associated with said commutator, a plurality of cooling air passages located in said armature, a plurality of radial air baffles associated with said brushing rigging, and a fan for directing cooling air through said stator, said rotor, and said brush rigging, the improvement which comprises providing a first means for directing said air leaving said passage in said armature away from said bearing and a second means directing said air leaving said stator toward said bearing.
Claim 2
Dependent Claim
103 words
In a dynamoelectric machine which includes a stator, a rotor rotatably supported by a plurality of bearings and including an armature and a commutator, a brush rigging associated with said commutator, a plurality of cooling air passages located in said armature, a plurality of radial air baffles associated with said brushing rigging, and a fan for directing cooling air through said stator, said rotor, and said brush rigging, the improvement which comprises providing a first means for directing said air leaving said passage in said armature away from said bearing and a second means directing said air leaving said stator toward said bearing.
Claim 3
Dependent Claim
16 words
A dynamoelectric machine according to claim 1 wherein said first means comprises a molded fiberglas baffle.
Claim 4
Dependent Claim
19 words
A dynamoelectric machine according to claim 1 wherein said second means comprises a combined bearing support and air baffle.
Claim 5
Dependent Claim
38 words
A dynamoelectric machine according to claim 3 wherein said support and baffle comprises a pair of annular rings interconnected by a plurality of radial, air directing arms, and wherein one of said rings has connected thereto the baffle.
Claim 6
Dependent Claim
18 words
A dynamoelectric machine according to claim 1, wherein said fan includes an annular shroud of abradable, foam material.
Claim 7
Dependent Claim
45 words
In a dynamoelectric machine which includes a stator, a rotor including an armature and a commutator, a brush rigging, and a fan for forcing cooling air through said machine, the improvement which comprises surrounding the tips of the fan blades with an abradable foam-filled shroud.
Claim 8
Dependent Claim
45 words
In a dynamoelectric machine which includes a stator, a rotor including an armature and a commutator, a brush rigging, and a fan for forcing cooling air through said machine, the improvement which comprises surrounding the tips of the fan blades with an abradable foam-filled shroud.
References Cited (Backward Citations)
US1551295A
Cited
US1549756A
Cited
US1920315A
Cited
US2457967A
Cited
US2454120A
Cited
US2519065A
Cited
DE845667C
Cited
US2604501A
Cited
US2693543A
Cited
US2970233A
Cited
US2993449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |