| http://www.w3.org/ns/prov#value | - My invention relates to a novel gear mechanism adapted to be used as a pump, a prime mover, or a transmission means which essentially consists of two helical members, disposed within one another, the outer member having one helical thread or tooth more than the inner member, every thread or tooth of said inner member having such an outline as to constantly in contact with the outer 10 member in an
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