Scroll-type hydraulic machine with two axially spaced scroll mechanisms

A scroll-type hydraulic machine, comprising:

• a first fluid volume changing mechanism comprising a first stationary scroll having a first scroll wrap, and a first orbiting scroll having on one surface thereof a second scroll wrap and on the other surface thereof a first orbiting scroll shaft, said first orbiting scroll being assembled with said first stationary scroll such that, when said second scroll wrap orbits with respect to said first scroll wrap, fluid introduced therebetween is changed in volume and discharged;
• a second fluid volume changing mechanism comprising a second stationary scroll having a third scroll wrap, and a second orbiting scroll having on one surface thereof a fourth scroll wrap and on the other surface thereof a second orbiting scroll shaft, said second orbiting scroll being assembled with said second stationary scroll such that, when said fourth scroll wrap orbits with respect to said third scroll wrap, fluid introduced therebetween is changed in volume and dischanged;
• a crank mechanism comprising a crankshaft having an eccentric through-hole extending therethrough, a first crank portion formed at one end thereof for rotatably supporting said first orbiting scroll shaft, and a second crank portion formed at the other end thereof for rotatably supporting said second orbiting scroll;
• and
• a thrust-cancelling shaft disposed in said eccentric through-hole of said crankshaft for supporting at one end thereof said first orbiting scroll and at the other end thereof said second orbiting scroll, thrust forces exerted on said first and second orbiting scrolls cancelling each other through said thrust-cancelling shaft.