Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2005-06-07
2005-06-07
Waks, Joseph (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S233000, C029S597000
Reexamination Certificate
active
06903481
ABSTRACT:
The commutator has a cylindrical collector (1), disposed on a motor armature shaft, and electrical-contact means (4, 5), which during one rotation of the collector (1) touch at least two each of a plurality of commutator laminations (3) that are present on the collector (1) and thereby establish an electrical connection between the applicable commutator laminations and external current connections (21, 22).The electrical-contact means becomes especially low-wearing because the electrical-contact means comprise at least two electrically conductive cylinders (4, 5) disposed in line with one another in the axial direction of the collector (1), the longitudinal axes (6, 7) are parallel to the longitudinal axis (2) of the collector (1); and that the at least two cylinders (4, 5) are placed relative to the collector (1) in such a manner and have a diameter such that the collector (1), in its rotation, rolls over the inside faces (8) or the outside faces of the at least two cylinders (4, 5), and in the process each of the cylinders (4, 5) is touched always by only one lamination (3) of the collector (3).
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Patent Abstracts of Japan vol. 1995, No. 06, Jul. 31, 1995 & JP 07 059320, Mar. 3, 1995.
Robert & Bosch GmbH
Striker Michael J.
Waks Joseph
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