Patent US3579007A successfully refreshed from Google Patents.
US3579007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator brush structure for electric motor
Assignee: Sunbeam Corp
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Filing: 1969-10-30
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Granted: 1971-05-18
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Expires: 1989-10-30
Abstract
Abstract An electric motor having a supporting frame within which the commutator brushes are supported. The brushes are received in channel-shaped recesses and are retained therein by spring clips which snap into engagement with the supporting frame.
Inventors
- 👤 John Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:26
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/14; H02K5/143; H02K5/148
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
187 words
In an electric motor including a field, a rotatabLe armature and a supporting frame the improvement comprising a commutator brush assembly including an elongated tubular brush support which is open at one end, a commutator brush slidably received within said support and spring biased toward said open end of said support, a channel-shaped recess formed integrally with a wall of said supporting frame and extending radially with respect to said armature, a pair of spaced openings in said wall on each side of said channel intermediate the ends thereof, said tubular brush support being received in said channel, a resilient one piece assembly clip urging said tubular support into seated position in said channel and having retaining legs extending through said openings into locking engagement with the side of said wall opposite from the side on which said channel faces, said clip comprises a W-shaped member having the curved center portion engaged with the tubular brush support and sidewardly disposed legs of said clip extending through said spaced openings, said legs having hooks on their ends to lock in engagement with the opposite side of said wall.
Claim 2
Dependent Claim
187 words
In an electric motor including a field, a rotatabLe armature and a supporting frame the improvement comprising a commutator brush assembly including an elongated tubular brush support which is open at one end, a commutator brush slidably received within said support and spring biased toward said open end of said support, a channel-shaped recess formed integrally with a wall of said supporting frame and extending radially with respect to said armature, a pair of spaced openings in said wall on each side of said channel intermediate the ends thereof, said tubular brush support being received in said channel, a resilient one piece assembly clip urging said tubular support into seated position in said channel and having retaining legs extending through said openings into locking engagement with the side of said wall opposite from the side on which said channel faces, said clip comprises a W-shaped member having the curved center portion engaged with the tubular brush support and sidewardly disposed legs of said clip extending through said spaced openings, said legs having hooks on their ends to lock in engagement with the opposite side of said wall.
Claim 3
Dependent Claim
68 words
The combination of claim 1 wherein said clip is formed with a central loop the outside curvature of which engages said tubular support and a pair of oppositely disposed side loops which are interconnected to said central loop and to said legs, said loops being deformed as said hooks enter into locking engagement with said wall to apply a biasing force between said clip and said tubular support.
Claim 4
Dependent Claim
55 words
The combination of claim 2 wherein said loops are of a semicylindrical shape and said legs are parallel to each other in their assembled position, said loops being preformed so that said legs are angled toward each other whereby said hooks will snap into locking engagement with said wall when said clip is assembled thereto.
Claim 5
Dependent Claim
29 words
The combination of claim 3 wherein said spaced openings are formed with sloping cam surfaces which bias said legs outwardly as said clip is assembled to said supporting frame.
Claim 6
Dependent Claim
171 words
An electric motor comprising a field, an armature including a supporting shaft, a plastic frame member which supports said field and armature bearing means, commutator brush means supported on said frame member, said brush means including a tubular support within which a carbon brush is slidably supported for engagement with a commutator associated with said armature, said frame member having a bottom wall generally perpendicular to said shaft within which an armature bearing is mounted, a brush enclosure formed integrally with said wall and projecting outwardly from said wall toward said field to an area adjacent said commutator, an open channel-shaped recess formed in said wall and extending into said brush enclosure and extending radially with respect to said commutator, said channel-shaped recess having an open end through said brush enclosure through which said carbon brush extends into engagement with said commutator, and a spring clip having retaining legs extending through spaced openings on either side of said channel-shaped recess and biasing said tubular support into seated engagement with said wall.
Claim 7
Dependent Claim
171 words
An electric motor comprising a field, an armature including a supporting shaft, a plastic frame member which supports said field and armature bearing means, commutator brush means supported on said frame member, said brush means including a tubular support within which a carbon brush is slidably supported for engagement with a commutator associated with said armature, said frame member having a bottom wall generally perpendicular to said shaft within which an armature bearing is mounted, a brush enclosure formed integrally with said wall and projecting outwardly from said wall toward said field to an area adjacent said commutator, an open channel-shaped recess formed in said wall and extending into said brush enclosure and extending radially with respect to said commutator, said channel-shaped recess having an open end through said brush enclosure through which said carbon brush extends into engagement with said commutator, and a spring clip having retaining legs extending through spaced openings on either side of said channel-shaped recess and biasing said tubular support into seated engagement with said wall.
Claim 8
Dependent Claim
37 words
The combination as set forth in claim 5 wherein said legs on said clip have hooks on their ends which are biased into locking engagement with complementary beads formed on said brush enclosure adjacent said spaced openings.
Claim 9
Dependent Claim
49 words
The combination of claim 6 wherein said spring clip is formed with a plurality of curved portions which interconnect said legs, one of said curved portions engaging said tubular support, deformation of said curved portions when said hooks are engaged with said beads biasing said support into said recess.
References Cited (Backward Citations)
US2683828A
Cited
US2798979A
Cited
US3177388A
Cited
US3176177A
Cited
US3329844A
Cited
US3474274A
Cited
US3456696A
Cited
US3436476A
Cited
US3525891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |