Non-circular centered seal for back pressure chamber

Details Non-circular centered seal for back pressure chamber Non-circular centered seal for back pressure chamber

2005-05-17

2005-05-17

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

C418S057000, C418S055400

Reexamination Certificate

active

06893234

ABSTRACT:
A scroll compressor is provided with a non-circular back pressure chamber which is still concentric about a center axis of the compressor, such as the center axis of the drive shaft. Stated another way, an inner seal and an outer seal define a back pressure chamber. The two seals are concentric, but at least one of the seals is non-circular. In this way, reduced a back pressure chamber can be provided while still allowing the amount of orbital movement necessary for the tap for communicating a compressed refrigerant to the back pressure chamber.

REFERENCES:
patent: 5833443 (1998-11-01), Lifson
patent: 6077057 (2000-06-01), Hugenroth et al.
patent: 6290478 (2001-09-01), Lifson
patent: 07035062 (1995-02-01), None
patent: WO 9911936 (1999-03-01), None

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