| 摘要 |
<p>A rotary pump or engine of the sliding rocking abutment type having an orbiting displacement member operating in a body cavity with abutments moving therewith and rocking in rocking members mounted in the body and having in each rocking member a passageway, or passageways the orifices of which coact with parts of the pump body so that as the abutments and rocking members are moved by the displacement member, the orifices are opened and closed by coaction with the body parts. The displacement member is provided with an internal chamber in which a further displacement member operates to give an inner pump of the sliding rocking abutment type.</p> |
