US4371803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator brush holder quadrature spring
Assignee: Ryobi North America Inc
•
Filing: 1980-09-29
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Granted: 1983-02-01
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Expires: 2000-09-29
Abstract
Abstract A commutator brush holder mounts a pair of tension band springs in quadrature relation. Both springs contact the brush end remote from the commutator and urge the brush into contact with the commutator, with constant force. The quadrature springs promote full and intimate contact between the brush and commutator, thereby minimizing brush bounce and tilt and resultant transient signal generation.
Inventors
- 👤 Arnold Schindel
- 👤 John A. Caspar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:02
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/38; H01R39/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
A motor commutator brush holder assembly comprising: means for retaining a single brush therein; at least first and second biasing means mounted in the brush retaining means and disposed in right angled overlying relation to each other, the biasing means contacting a brush end opposite the end adapted for contacting a commutator,
Claim 2
Dependent Claim
52 words
A motor commutator brush holder assembly comprising: means for retaining a single brush therein; at least first and second biasing means mounted in the brush retaining means and disposed in right angled overlying relation to each other, the biasing means contacting a brush end opposite the end adapted for contacting a commutator,
Claim 3
Dependent Claim
13 words
thereby urging the brush into full contact with the commutator during motor operation.
Claim 4
Dependent Claim
13 words
thereby urging the brush into full contact with the commutator during motor operation.
Claim 5
Dependent Claim
28 words
The assembly of claim 1 wherein the biasing means comprises: first and second tension band springs, each having oppositely disposed coiled ends separated by a central beam section.
Claim 6
Dependent Claim
19 words
The assembly of claim 1 wherein the brush retaining means includes recesses formed therein for receiving the mounted springs.
Claim 7
Dependent Claim
39 words
The assembly of claim 2 wherein a fold is formed at each end of the central beam section for enabling the central beam section of each spring to flatly bear against a brush end, opposite a commutator confronting end.
Claim 8
Dependent Claim
21 words
The assembly set forth in claim 2 wherein the brush retaining means includes recesses formed therein for receiving the mounted springs.
Claim 9
Dependent Claim
42 words
The subject matter set forth in claim 5 wherein a fold is formed at each end of the spring beam section for enabling the central beam section of each spring to flatly bear against a brush end, opposite a commutator confronting end.
Claim 10
Dependent Claim
110 words
A brush holder for a motor commutator comprising: a motor brush; a metallic block having a slot formed therein for receiving the brush; first and second tension band springs, each spring having oppositely disposed coiled ends separated by a Cental beam section, the springs positioned in recesses formed in the block in right angled overlying relation; folds formed in each spring between the junctures of the beam section and the coiled ends, the folds enabling the central beam sections of the springs to flatly bear against an end of the brush opposite an end adapted for contacting a commutator, the springs enabling full contact with a commutator during motor operation.
Claim 11
Dependent Claim
110 words
A brush holder for a motor commutator comprising: a motor brush; a metallic block having a slot formed therein for receiving the brush; first and second tension band springs, each spring having oppositely disposed coiled ends separated by a Cental beam section, the springs positioned in recesses formed in the block in right angled overlying relation; folds formed in each spring between the junctures of the beam section and the coiled ends, the folds enabling the central beam sections of the springs to flatly bear against an end of the brush opposite an end adapted for contacting a commutator, the springs enabling full contact with a commutator during motor operation.
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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) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |