Patent US3573522A successfully refreshed from Google Patents.
US3573522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamoelectric machine including brush holding means
Assignee: Ford Motor Co
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Filing: 1969-12-29
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Granted: 1971-04-06
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Expires: 1989-12-29
Abstract
Abstract This disclosure relates to a dynamoelectric machine having brush holding means which comprises essentially a single-piece brush holder constructed of an insulating material for slidingly receiving brushes that engage a cylindrical portion of a commutator. This brush holder is positioned within the machine by engagement with the stator in such a position that slots positioned therein are located radially outwardly of the cylindrical portion of the commutator. The brushes of the machine are received within these slots so that the brush holder does not limit movement of the brushes in an axial direction with respect to the cylindrical portion of the commutator. Axial movement of the brushes is limited by having one surface of each brush positioned closely adjacent to or in engagement with the riser of the commutator and by having another surface of each brush positioned in close proximity to or in engagement with an insulating washer.
Inventors
- 👤 Alex M Pentland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:27
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/14; H02K5/143; H02K5/148
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
242 words
In a dynamoelectric machine, a stator including a frame, a rotor rotatably mounted within said stator, said rotor comprising a current collector member having a generally cylindrical portion the axis of which extends in a direction generally parallel to the axis of said stator and a riser portion extending radially from said generally cylindrical portion, a brush holder having a central opening therein said brush holder having a plurality of slots extending radially outwardly from said central opening, cooperating means on said frame and on said brush holder for positioning said brush holder in said stator in a position where said generally cylindrical portion of said current collector member extends through said central opening in said brush holder, a brush positioned in each of said slots, said riser limiting the movement of each of said brushes in one axial direction, a metallic end cap for said stator engaging said frame, an insulator positioned over one end of said stator intermediate said brushes and said end cap limiting the axial movement of each of said brushes in the other direction. 2. The combination of claim 1 in which said cooperating means on said stator and said brush holder comprise a plurality of spaced radially inwardly extending tabs positioned on said frame and a plurality of complementary axially extending slots positioned in said brush holder, each of said slots having an end wall positioned over the remote end thereof with respect to said riser.
Claim 2
Dependent Claim
50 words
The combination of claim 1 including a plurality of spaced through bolts engaging said metallic end cap and said stator for holding said metallic end cap on said stator, said brush holder having a plurality of slots positioned therein, each of said through bolts extending through one of said slots.
Claim 3
Dependent Claim
53 words
The combination of claim 1 including a plurality of spring means, each of said spring means having one portion thereof anchored to said brush holder and another portion thereof engaging one of said brushes for urging each of said brushes radially inwardly into engagement with the cylindrical portion of said current collector member.
Claim 4
Dependent Claim
61 words
The combination of claim 2 in which each of said tabs has a radially extending face defining a plane perpendicular to the axis of said cylindrical portion of current collector member, and the end walls of each of said slots define a plane, the end wall of each of said slots engaging a radially extending face on one of said tabs.
Claim 5
Dependent Claim
30 words
The combination of claim 5 in which said frame is annular in configuration and said tabs are struck from the inner surface thereof at equally spaced positions around the periphery.
Claim 6
Dependent Claim
187 words
A dynamoelectric machine comprising a stator, an armature rotatably mounted within said stator, said armature including a commutator having a cylindrical portion extending generally parallel to the axis of rotation of said armature and a riser portion extending generally perpendicular to said cylindrical portion, a plurality of commutator brushes, a one-piece brush holding means constructed of insulating material mounted within said stator and a central opening positioned therein, said cylindrical portion of said commutator extending through said opening, said brush holder having a plurality of spaced slots extending radially outwardly from said central opening, each of said slots receiving one of said brushes for sliding movement radially with respect to said cylindrical portion of said commutator, spring means engaging said brush holder means and said brushes urging one surface of each of said brushes into engagement with said cylindrical portion of said commutator, said riser portion limiting the axial movement of said brushes in one direction, said stator including an end cap and insulating means positioned between said end cap and said brush holding means for limiting the axial movement of said brushes in the other direction.
Claim 7
Dependent Claim
187 words
A dynamoelectric machine comprising a stator, an armature rotatably mounted within said stator, said armature including a commutator having a cylindrical portion extending generally parallel to the axis of rotation of said armature and a riser portion extending generally perpendicular to said cylindrical portion, a plurality of commutator brushes, a one-piece brush holding means constructed of insulating material mounted within said stator and a central opening positioned therein, said cylindrical portion of said commutator extending through said opening, said brush holder having a plurality of spaced slots extending radially outwardly from said central opening, each of said slots receiving one of said brushes for sliding movement radially with respect to said cylindrical portion of said commutator, spring means engaging said brush holder means and said brushes urging one surface of each of said brushes into engagement with said cylindrical portion of said commutator, said riser portion limiting the axial movement of said brushes in one direction, said stator including an end cap and insulating means positioned between said end cap and said brush holding means for limiting the axial movement of said brushes in the other direction.
Claim 8
Dependent Claim
55 words
The combination of claim 7 in which said stator includes a generally annular frame portion having spaced radially inwardly extending means positioned on the inner surface thereof and said brush holder includes means cooperating with said spaced radially inwardly extending means for positioning said brush holder means axially within said annular frame of said stator.
Claim 9
Dependent Claim
104 words
The combination of claim 8 in which said radially outwardly extending means on said frame include radially extending face defining a plane substantially perpendicular to the axis of said cylindrical portion of said commutator and said means included in said brush holder means comprises a plurality of slots complementary to said struck-in tabs and having end walls positioned thereover, one surface of which defines a single plane, the end wall of each of said slots engaging the radially extending face on one of said struck-in tabs, the plane defined by said end walls positioned perpendicular to the sidewalls of the slots receiving said brushes.
Claim 10
Dependent Claim
212 words
In a dynamoelectric machine, a stator, a frame, a rotor rotatably mounted within said stator, said rotor comprising a current collector member having a generally cylindrical portion the axis of which extends in a direction generally parallel to the axis of said stator and a riser portion extEnding radially from said generally cylindrical portion, a brush holder having a central opening therein, said brush holder having a plurality of slots extending radially outwardly from said central opening, cooperating means on said stator and on said brush holder for positioning said brush holder in said stator in the position where said generally cylindrical portion of said current collector member extends through said central opening in said brush holder, each of said slots receiving one of said brushes for sliding movement radially with respect to said cylindrical portion of said commutator, means engaging said brush holder and said brushes for urging one surface of each of said brushes into engagement with said cylindrical portion of said current collector member, said riser limiting the movement of each of said brushes in one axial direction, and an end cap for the dynamoelectric machine including an insulating means supported by said stator in a position to limit the axial movement of said brushes in the other direction.
Claim 11
Dependent Claim
212 words
In a dynamoelectric machine, a stator, a frame, a rotor rotatably mounted within said stator, said rotor comprising a current collector member having a generally cylindrical portion the axis of which extends in a direction generally parallel to the axis of said stator and a riser portion extEnding radially from said generally cylindrical portion, a brush holder having a central opening therein, said brush holder having a plurality of slots extending radially outwardly from said central opening, cooperating means on said stator and on said brush holder for positioning said brush holder in said stator in the position where said generally cylindrical portion of said current collector member extends through said central opening in said brush holder, each of said slots receiving one of said brushes for sliding movement radially with respect to said cylindrical portion of said commutator, means engaging said brush holder and said brushes for urging one surface of each of said brushes into engagement with said cylindrical portion of said current collector member, said riser limiting the movement of each of said brushes in one axial direction, and an end cap for the dynamoelectric machine including an insulating means supported by said stator in a position to limit the axial movement of said brushes in the other direction.
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |