Impregnated carbon brush for electrical machinery

Details Impregnated carbon brush for electrical machinery Impregnated carbon brush for electrical machinery

1977-08-25

1979-12-04

Ansher, Harold

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

252 11, 252 122, 252502, 252510, 427114, 428408, 428422, H01R 3922, B05D 512, H01R 3926

Patent

active

041773160

ABSTRACT:
An impregnated carbon brush for electrical machinery with improved running properties and increased wear-resistance, in which the carbon brush has an impregnating medium containing non-melting grease, and/or a non-melting wax, and/or a non-flowing oil. The impregnating medium in the carbon brush is on a synthetic, mineral, animal or vegetable base which is thoroughly mixed with a gelatinizing agent on an inorganic and/or organic base and thereby transformed to a non-melting or non-flowing harder and more wear-resistant condition. The gelatinizing agent contained in the carbon brush as a component of the impregnating medium comprises montmorillonite flakes with surfaces coated with long-chain hydrocarbons. The carbon brush includes additives for improving the sliding properties in the form of inorganic and/or organic additives such as metal sulfides, metal oxides and PTFE powder. The carbon brush contains 0.1 to 25% by weight of impregnation medium relative to the weight of the impregnated carbon brush.

REFERENCES:
patent: 2881100 (1959-04-01), Hardman
patent: 3455864 (1969-07-01), Dodson
patent: 3751294 (1973-08-01), Fridman et al.
patent: 3956568 (1976-05-01), Kanemaru et al.
patent: 3992725 (1976-11-01), Homsy
patent: 3996408 (1976-12-01), Fridman et al.
patent: 4080233 (1978-03-01), McCloskey
patent: 4140832 (1979-02-01), Menegay

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