Rotary Patents (Class 123/200)
- Isolated charge in movable transfer element (Class 123/222)
- Reciprocating or oscillating compression volume means (Class 123/223)
- Compression volume means circumferentially disposed relative to expansion volume means (Class 123/228)
- Compression volume means axially disposed relative to expansion volume means (Class 123/234)
- Compression volume means radially disposed relative to expansion volume means (Class 123/239)