US4425536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive contacts commutator apparatus
Assignee: Individual
•
Filing: 1982-01-07
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Granted: 1984-01-10
•
Expires: 2002-01-07
Abstract
Abstract Commutator apparatus for electric motors includes electrical conductors making electrical contact with brushes through substantially three hundred sixty degrees of rotation of the commutator to provide current paths during time periods of current flow to prevent arcing. The commutator apparatus further includes cylindrical portions and blade portions which overlap and on which brushes are positioned to make the electrical contacts.
Inventors
- 👤 Dwayne E. Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:23
CPC Classifications
H; H02; H02K; H02K13/00; H02K13/14; H02K13/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
373 words
Commutator and brush apparatus for an electric motor having a rotating shaft, comprising in combination: first conductive means secured for rotation on the motor shaft, including a first conductive portion extending arcuately for three hundred sixty degrees, a second conductive portion extending arcuately for substantially less than three hundred sixty degrees, and a third conductive portion disposed generally arcuately opposite from the second conductive portion and extending arcuately for substantially less than three hundred sixty degrees; second conductive means secured for rotation on the motor shaft with the first conductive means and electrically isolated from the first conductive means, including a fourth conductive portion extending arcuately for three hundred sixty degrees, a fifth conductive portion extending arcuately for substantially less than three hundred sixty degrees, and a sixth conductive portion disposed generally arcuately oppositely from the fifth conductive portion and extending arcuately for substantially less than three hundred sixty degrees; output means connected to the first and second conductive means; input brush means disposed on the first conductive means for providing a current for the output means during a first portion of each three hundred sixty degree rotation of the shaft, and disposed on the second conductive means for providing a current for the output means during a second portion of each three hundred sixty degree rotation of the shaft; return brush means disposed on the second conductive means for providing a return path for the electrical current from the output means and from the input brush means during the first portion of each three hundred sixty degree rotation of the shaft, and disposed on the first conductive means for providing a return path during the second portion of each three hundred sixty degree rotation of the shaft; first diode brush means connected to the first and second conductive means for providing a current return path from the second conductive means to the first conductive means during a third portion of each three hundred sixty degree rotation of the shaft; and second diode brush means connected to the first and second conductive means for providing a current return path from the first conductive means to the second conductive means during a fourth portion of each three hundred sixty degree rotation of the shaft.
Claim 2
Dependent Claim
373 words
Commutator and brush apparatus for an electric motor having a rotating shaft, comprising in combination: first conductive means secured for rotation on the motor shaft, including a first conductive portion extending arcuately for three hundred sixty degrees, a second conductive portion extending arcuately for substantially less than three hundred sixty degrees, and a third conductive portion disposed generally arcuately opposite from the second conductive portion and extending arcuately for substantially less than three hundred sixty degrees; second conductive means secured for rotation on the motor shaft with the first conductive means and electrically isolated from the first conductive means, including a fourth conductive portion extending arcuately for three hundred sixty degrees, a fifth conductive portion extending arcuately for substantially less than three hundred sixty degrees, and a sixth conductive portion disposed generally arcuately oppositely from the fifth conductive portion and extending arcuately for substantially less than three hundred sixty degrees; output means connected to the first and second conductive means; input brush means disposed on the first conductive means for providing a current for the output means during a first portion of each three hundred sixty degree rotation of the shaft, and disposed on the second conductive means for providing a current for the output means during a second portion of each three hundred sixty degree rotation of the shaft; return brush means disposed on the second conductive means for providing a return path for the electrical current from the output means and from the input brush means during the first portion of each three hundred sixty degree rotation of the shaft, and disposed on the first conductive means for providing a return path during the second portion of each three hundred sixty degree rotation of the shaft; first diode brush means connected to the first and second conductive means for providing a current return path from the second conductive means to the first conductive means during a third portion of each three hundred sixty degree rotation of the shaft; and second diode brush means connected to the first and second conductive means for providing a current return path from the first conductive means to the second conductive means during a fourth portion of each three hundred sixty degree rotation of the shaft.
Claim 3
Dependent Claim
50 words
The apparatus of claim 1 in which the input brush means includes a first input brush disposed on the third conductive portion during the first portion of rotation, and a second input brush disposed on the fifth conductive portion of the second conductive means during the second portion of rotation.
Claim 4
Dependent Claim
28 words
The apparatus of claim 2 in which the first and second conductive means include cylindrical portions spaced apart from each other and coaxially aligned on a motor shaft.
Claim 5
Dependent Claim
27 words
The apparatus of claim 3 in which the second and third conductive portions and the fifth and sixth conductive portions each extend arcuately less than ninety degrees.
Claim 6
Dependent Claim
36 words
The apparatus of claim 3 in which the second and third conductive portions of the first conductive means and the fifth and sixth conductive portions of the second conductive means each include leading and trailing edges.
Claim 7
Dependent Claim
32 words
The apparatus of claim 5 in which the trailing edge of the third conductive segment is spaced apart from the leading edge of the fifth conductive segment by greater than ninety degrees.
Claim 8
Dependent Claim
32 words
The apparatus of claim 6 in which the leading edge of the third conductive segment is spaced apart from the trailing edge of the fifth conductive segment by greater than ninety degrees.
Claim 9
Dependent Claim
14 words
The apparatus of claim 7 in which the output means includes a commutator coil.
Claim 10
Dependent Claim
30 words
The apparatus of claim 8 in which the output means includes a pair of conductors for conducting an alternating current from the first conductive means and the second conductive means.
Claim 11
Dependent Claim
60 words
The apparatus of claim 1 in which the return brush means includes a first return brush disposed on the second conductive portion of the first conductive means during the first portion of rotation, and a second return brush disposed on the sixth conductive portion of the second conductive portion of the second conductive means during the second portion of rotation.
Claim 12
Dependent Claim
148 words
The apparatus of claim 1 in which: the first diode brush means includes a first diode brush disposed on the fourth conductive portion of the second conductive means, a second diode brush disposed on the third conductive portion of the first conductive means during the third portion of rotation, and a first diode connected to the first and second diode brushes for providing a circuit path for a flow of current from the second conductive means to the first conductive means during the third portion of rotation; and the second diode brush means includes a third diode brush disposed on the first conductive portion of the second conductive means during the fourth portion of rotation, and a second diode connected to the third and fourth diode brushes for providing a current path from the first conductive means to the second conductive means during the fourth portion of rotation.
Claim 13
Dependent Claim
35 words
The apparatus of claim 1 in which the second conductive portion of the first conductive means and the sixth conductive portion of the second conductive means are interleaved and have a common center of rotation.
Claim 14
Dependent Claim
46 words
The apparatus of claim 12 in which the return brush means includes a return brush disposed adjacent to the interleaved second and sixth conductive portions on their common center of rotation and is disposed alternately on the said second and sixth conductive portions as they rotate.
Claim 15
Dependent Claim
46 words
The apparatus of claim 1 in which the first and second conductive means further includes a nonconductive disc secured to the rotating shaft, and the first, second, and third conductive portions and the fourth, fifth, and sixth conductive portions extend arcuately and concentrically on the disc.
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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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |