| 摘要 |
A fluid displacement apparatus comprising a housing (51) having a spherical inner surface (17), within which is mounted a body member (10) having in its outer surface a pair of recesses (11, 12). A pair of piston members (13, 14) rotatably mounted to the housing (51) each include a piston portion (15) slidably engaged with its respective recess (11, 12) to define working chambers of varying volumes upon rotation. A pair of ports (70) connect the working chambers cyclically with a fluid inlet and a fluid outlet. |
