Patent ID: 6903484

Claim:
An electrical brush holder for applying a mechanical force to an electrical fiber or foil brush and for establishing electrical contact between the electrical brush sliding against a substrate, and a current conducting element, comprising: a first wall fastened to the current conducting element; a second wall releasably fastened to the brush; a sidewall lengthwise extendable in an axis direction of the brush and cooperating with the first and second walls to form a volume defined by the first wall, the second wall and the sidewall, the brush holder configured to apply an approximately constant pressure to the brush; a flexible cable comprising of a plurality of ultra-fine metal fibers configured to conduct current between the current conducting element and the brush; and a fluidic medium contained in the volume, the fluidic medium comprising a liquid metal and a pressurized gas, the pressurized gas contained in a single flexible membrane surrounded by the liquid metal.