I01. Pappenheim Chamber Wheel Mechanism
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This is the oldest form of chamber-wheel-gear, and the forerunner of modern gear pumps. When used as a pump, the fluid is delivered in a continuous stream, the volume of flow per revolution being about equal to the annular space between the point and root cylinders.

Reference :
Gelsone, Kathryn (Technician)
Peck, Susan (Technician)

Models :