Brushless slip ring using rolling elements as electrical conduct

Details Brushless slip ring using rolling elements as electrical conduct Brushless slip ring using rolling elements as electrical conduct

1997-07-30

1999-07-13

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310219, 439 12, 439 17, 439 19, 439 21, 439 27, H02K 1300, H02K 1302, H01R 3912

Patent

active

059231149

ABSTRACT:
A brushless slip ring includes a housing, a plurality of annular spaces disposed in the housing and spaced apart along a common longitudinal axis, and a cageless assembly of electrically conductive spherical balls freely rotatably disposed in each of the spaces. Each of the spaces is formed between radially inner and outer electrically conductive surfaces of a rotor and stator, respectively, and a pair of axially spaced retainer rings. The spherical balls conduct electrical current between the outer and inner surfaces. The balls are rigid and harder than the inner and outer surfaces and are arranged in an annular row. The balls occupy substantially the entire circumference of the space and are freely circumferentially movable relative to one another within the space for making contact with one another.

REFERENCES:
patent: 1176554 (1916-03-01), Herzig
patent: 1649276 (1927-11-01), Adam
patent: 2086784 (1937-07-01), Taylor
patent: 2181145 (1939-11-01), Mose
patent: 2502252 (1950-03-01), Faile
patent: 3741678 (1973-06-01), Romerhusen
patent: 3832020 (1974-08-01), McCloskey
patent: 4006954 (1977-02-01), Ikawa et al.
patent: 4447752 (1984-05-01), Boyce et al.
patent: 4592605 (1986-06-01), Kapler

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