The diaphragm 4 is moved with a suction stroke in direction B and {HEAD ~ a delivery stroke} in {TAIL ~ direction C} by means of a hydraulic fluid contained in a working chamber 9, that also includes a conventional device 10 for compensating leaks 
in
The diaphragm 4 is moved with a suction stroke in direction B and { HEAD ~ a delivery stroke } in { TAIL ~ direction C } by means of a hydraulic fluid contained in a working chamber 9 , that also includes a conventional device 10 for compensating leaks
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH