US3673447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator cooling means
Assignee: Individual
•
Filing: 1968-08-20
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Granted: 1972-06-27
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Expires: 1988-08-20
Abstract
Abstract An electric machine having a rotor winding connected to a collector or to slip rings and brushes contacting said collector or slip rings, said collector or slip rings and brushes being capsuled in a supporting structure for the one bearing of the machine and the brushes, axial cooling-air ducts being formed in said structure for admitting cooling air to the windings of the machine.
Inventors
- 👤 Bruno Zumbach
- 👤 Heinz Zumbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:18
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/10; H02K5/14; H02K5/143; H02K5/148; H02K5/15; H02K5/22; H02K5/225
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
175 words
An electric machine comprising a yoke ring, an armature including an aRmature winding and rotatably mounted within said yoke ring, bearing means for said armature and brushes contacting rotatable conductor means connected to said armature winding, a supporting structure for said brushes and one of said bearing means adjacent said rotatable conductor means, said structure comprising a radial bearing flange wherein said one bearing means is mounted, a second radial flange parallel to said bearing flange and having a central opening closely mating a portion of said armature between said conductor means and said armature winding, said flanges being interconnected by axially extending webs of channel - shaped sections and open at their outer side, said flanges having apertures where interconnected with said webs such that air ducts are formed through said apertures and webs respectively, and a mantle removably attached to said flanges and covering the space between said flanges, said supporting structure being connected to said yoke ring and forming together with said mantle a capsule enclosing said brushes and rotatable conductor means.
Claim 2
Dependent Claim
175 words
An electric machine comprising a yoke ring, an armature including an aRmature winding and rotatably mounted within said yoke ring, bearing means for said armature and brushes contacting rotatable conductor means connected to said armature winding, a supporting structure for said brushes and one of said bearing means adjacent said rotatable conductor means, said structure comprising a radial bearing flange wherein said one bearing means is mounted, a second radial flange parallel to said bearing flange and having a central opening closely mating a portion of said armature between said conductor means and said armature winding, said flanges being interconnected by axially extending webs of channel - shaped sections and open at their outer side, said flanges having apertures where interconnected with said webs such that air ducts are formed through said apertures and webs respectively, and a mantle removably attached to said flanges and covering the space between said flanges, said supporting structure being connected to said yoke ring and forming together with said mantle a capsule enclosing said brushes and rotatable conductor means.
Claim 3
Dependent Claim
28 words
A machine according to claim 1, comprising sealing compound covering winding heads of said armature, said sealing compound having a smooth and concentric surface inside said second flange.
Claim 4
Dependent Claim
29 words
A machine according to claim 2, wherein said sealing compound has a step, whereby the said second flange closely mates the step both at its axial and radial surface.
Claim 5
Dependent Claim
20 words
A machine according to claim 1 comprising a cover plate having ventilation gaps and being attached to said bearing flange.
Claim 6
Dependent Claim
14 words
A machine according to claim 4 wherein said cover plate is a bearing cover.
Claim 7
Dependent Claim
21 words
A machine according to claim 4 wherein said cover plate has an axial flange with an aperture for passage of cables.
Claim 8
Dependent Claim
28 words
A machine according to claim 6 wherein said cover plate is adapted to be attached in different angular positions in order to determine the position of the cable.
Claim 9
Dependent Claim
28 words
A machine according to claim 1 comprising terminal blocks at the outside and brush holders at its inner side of said webs, said mantle covering said terminal blocks.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |