Assertion: commutator | /r/HasProperty | formed of carbon
Facets:
Source sentences:
text: A preferred embodiment of the present invention is the method of making a fuel pump for operation in an environment of a hydrocarbon fuel having a significant portion of oxygen-containing moieties, wherein the pump consists of a body, a shaft, a commutator, and brushes in contact with the commutator, where the commutator is formed of carbon, the method comprising affixing a carbon article to a substrate, machining the article to a commutator, and cutting slots into the commutator.