Patent ID: 8764421

Claim:
A scroll type fluid machinery comprising: a. a first volume changing mechanism comprising a first stationary scroll and a first orbiting scroll; a second volume changing mechanism comprising a second stationary scroll and a second orbiting scroll; b. a housing connecting with said first and second stationary scrolls; and c. a plurality of orbiting units provided between said first and second volume changing mechanisms, with each said orbiting unit comprising: a). a rotating member being rotatably supported on said housing; and b). a thrust-canceling shaft connecting with one end thereof to said first orbiting scroll and with the other end thereof to said second orbiting scroll, being eccentrically and rotatably supported in said rotating member, and comprising one or more assembly sets, with each comprising: a] a connector connecting at least one of said first and second orbiting scrolls through threads; and b] one or more turning elements constraining said connector circumferentially while allowing said connector to move axially.