| 摘要 |
A rotary piston and cylinder device 1 comprising a rotor 2, a stator and a shutter disc 3, the rotor comprising a piston 5 which extends from the rotor into the cylinder space such that the rotor and the stator together define the cylinder space, where the shutter disc passes through the cylinder space and forms a partition therein. The disc comprises a slot 3a which allows passage of the piston therethrough, the slot is provided between two surface portions which receive the piston therethrough, where at least one of the surfaces defines a close-running region with the piston to provide a fluid seal, such that for at least part of the period during which the piston passes through the slot, the close-running region is offset from a mid-plane which extends through the disc and is co-planar with the disc. |
