Rotary expansible chamber devices – Heat exchange or non-working fluid lubricating or sealing – Non-working fluid passage in inner working or reacting member
Reexamination Certificate
2006-04-04
2006-04-04
Trieu, Theresa (Department: 3748)
Rotary expansible chamber devices
Heat exchange or non-working fluid lubricating or sealing
Non-working fluid passage in inner working or reacting member
C418S055100, C418S055400, C418S055600, C418S098000
Reexamination Certificate
active
07021912
ABSTRACT:
A second frame is arranged between a first frame and an orbiting scroll, and a central space and an outer peripheral space are sealed off by a seal portion, which is formed between an end surface of a shaft support of the orbiting scroll and the second frame. Also, a balance weight is arranged in a space between an underside of the second frame and the first frame. Thereby, most of an oil having lubricated respective shaft supports flows into the space below the second frame, and the oil accumulated in the space is discharged through an oil scavenge pipe into an oil reservoir in a lower portion of a closed vessel. Also, since the balance weight can be assembled from a side of the orbiting scroll in a state, in which the second frame is removed, it is possible to mount the balance weight close to the orbiting scroll.
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Fujimura Kazuyuki
Hayase Isao
Matsunaga Mutsunori
Mizuno Takao
Ohtahara Masaru
Antonelli, Terry Stout and Kraus, LLP.
Hitachi , Ltd.
Trieu Theresa
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