US4389588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current carrying constant force brush holder assembly
Assignee: Individual
•
Filing: 1982-03-24
•
Granted: 1983-06-21
•
Expires: 2002-03-24
Abstract
Abstract A brush holder assembly for electrically-coupling relatively movable conductors comprises a brush holder having a cavity which slidably receives a brush and having a pair of shoulders located on opposite sides of the cavity to confront a conductor. An electrically-conductive twin coil spring is mounted in the cavity with its saddle portion engaging one end of the brush and its coils disposed adjacent the shoulders for biasing the other end of the brush into contact with the conductor. An electrical contact member is interposed between at least one of the shoulders and its engaged spring coil to provide a current path into the side of the brush adjacent the coil for improving the overall performance of the brush assembly.
Inventors
- 👤 Alexander Rankin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:00
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/38; H01R39/39
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
168 words
For use in making electrical contact between relatively movable electrical conductors, a brush holder assembly comprising: a brush holder having a brush-receiving cavity and a pair of shoulders disposed on opposite sides of said cavity and adapted to confront a movable conductor, a brush slidably received in said cavity, said brush having an outer end and an inner end adapted to engage said movable conductor, a twin coil spring of electrically-conductive metal mounted in said holder, said twin coil spring having a pair of coils disposed on opposite sides of said brush and an integral saddle engaging the outer end of said brush, said twin coil spring between said coils and said saddle portion adapted to engage opposite sides of said brush and provide electrical communication between said coils and brush, and means providing an electrical contact between at least one of said shoulders and its respective coil of said twin coil spring, whereby a relatively short current path is provided between the spring coil and the brush.
Claim 2
Dependent Claim
168 words
For use in making electrical contact between relatively movable electrical conductors, a brush holder assembly comprising: a brush holder having a brush-receiving cavity and a pair of shoulders disposed on opposite sides of said cavity and adapted to confront a movable conductor, a brush slidably received in said cavity, said brush having an outer end and an inner end adapted to engage said movable conductor, a twin coil spring of electrically-conductive metal mounted in said holder, said twin coil spring having a pair of coils disposed on opposite sides of said brush and an integral saddle engaging the outer end of said brush, said twin coil spring between said coils and said saddle portion adapted to engage opposite sides of said brush and provide electrical communication between said coils and brush, and means providing an electrical contact between at least one of said shoulders and its respective coil of said twin coil spring, whereby a relatively short current path is provided between the spring coil and the brush.
Claim 3
Dependent Claim
37 words
The brush holder assembly according to claim 1 wherein said electrical contact means includes an electricallyconductive member interposed between said one shoulder and said spring coil, and means connecting said conductive member to a source of electricity.
Claim 4
Dependent Claim
49 words
The brush holder assembly according to claim 1 wherein said electrical contact means includes a conductive member having a pair of contact portions disposed between said shoulders of said holder and said coils of said twin coil spring, and means connecting said conductive member to a source of electricity.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |