Scroll fluid apparatus having an intermediate seal member with a compressed fluid passage therein

A scroll fluid apparatus comprising:

• a drive scroll including a first wrap and a driven scroll including a second wrap;
• a housing in which said scrolls are driven such that the wraps compress fluid and discharge compressed fluid outside of said housing;
• an intermediate seal member with a passage for compressed fluid therein which is disposed between a discharge opening through which the fluid is withdrawn out of said housing and a discharge exit of said driven scroll, said intermediate seal member having a through hole which is communicated with a discharge exit of the driven scroll;
• a seal sleeve forming part of said intermediate seal member permitting said through hole to move in a discharging direction of the compressed fluid while maintaining a gas-tight seal to the outside of said housing said seal sleeve having a fluid pressure receiving surface facing in a discharging direction of the compressed fluid;
• and
• a seal plate forming another part of said intermediate seal member having an opening which communicates said discharge opening with said through hole and disposed such that one face gas-tightly contacts a periphery of said through hole and another face gas-tightly contacts the periphery of said discharge opening;
• passage of the compressed fluid from a tail end of said seal sleeve to said discharge opening being maintained gas-tight while said seal sleeve is acted upon by pressure of said compressed fluid on said fluid pressure receiving surface.