Wolfhart Industries

Manufacturer of clean water hydraulic motors and high pressure drinking water pumps

with the simplest oil-free but most powerful piston actuating mechanism ever created.

Interested manufacturers of this revolutionary principle for clean water hydraulic motors and total oil-free high pressure water pumps (2000psi) may qualify for a free license.
(For your protection you must write an encrypted E-mail simply via a free account at https://www.hushmail.com/ to watermotors@hushmail.com.)


Introducing the first bearing-less rotary piston design

for pumps, compressors, W-H-motors with new work processes.

US-Patent 6152014

Wolfhart pump2.gif               File:Wolfhart pump1.gif

View in the stationary system and............................................View in the co-rotating system

(The cylinders are half cut off)

Wolfhart pump motor.gif       

  Clear water hydraulic at 1000 psi

See video  

First sea water hydraulic motor and first high pressure water pump

with the bearing-less and oil-free Wolfhart Principle

(6ccm, 5 GPM at 1000 psi and 3750 rpm (max 5000 rpm)


No bearings any more for the piston forces
Greatly reduced friction and wear even at high pressure and high volumes
Total oil-free operation - including the piston actuating mechanism
High efficiency
A one stroke working process only
A six cylinder axial rotary piston design
No inertia forces only balanced rotating parts
The water has never to stop and reverse the flow direction as in a normal piston pumps
Completely hydraulic balance of all sliding parts
Anti blocking device
Anti seizing device for the pistons
Dry running
Self priming
Long lasting
No valves
Extended range of speed
Adjustable volume (optional)



The second generation has a ceramic rotor for a long service live of a clean water hydraulic motor.
(6cc, 1000psi, max 5000rpm)


Be one of the first to enjoy this new but proven technology. Renting or leasing also available.

contact: watermotors@hushmail.com


tests results of this Wolfhart pump   - more details of this rotary piston design            -  Publications:  US-Patent 6,152,014     "World Pumps"

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