Wolfhart Pump
 
 
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This is a type of axial piston pump which has a unique direct transformation of a piston force into torque (or vice-versa), with no bearings within the piston actuating mechanism. The stroke motion is accomplished without the normally associated oscillating mass. The dome-headed pistons, piston block and drive shaft are all one piece (top photo on right). The only other moving part is the free-floating cylinder drum, which has no bearing and is driven (guided laterally) by the co-rotating pistons.

The inventor has found that 5 degrees for the angle between the two rotating parts is the optimal angle to provide an operable pump, but not enough to require the use of bearings.
  1. Piston Block
  2. Cylinder Drum
  3. Piston Shaft
  4. Five degree angled control surface
  5. End Plate
  6. Ports
  7. Drive Shaft
  8. Piston Head

 
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  Archimedes pump  

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