Scroll wrap tip with abradable selectively applied coating...

Details Scroll wrap tip with abradable selectively applied coating... Scroll wrap tip with abradable selectively applied coating...

2005-05-03

2005-05-03

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

C418S055400, C418S055600, C418S178000, C418S001000, C029S888022

Reexamination Certificate

active

06887052

ABSTRACT:
A scroll compressor is provided with a generally spiral wrap having an abradable or conformable coating on radially inner portions of its tip. The coating is not applied to radially outer portions. During operation of the scroll compressor, the coating will eliminate tip gap leakage adjacent radially inner, higher discharge pressure portions of the compression process. The outer, non-coated portions will bear the axial load, and ensure the coating will not wear away to an undue amount.

REFERENCES:
patent: 4460321 (1984-07-01), Terauchi
patent: 4802831 (1989-02-01), Suefuji et al.
patent: 5035589 (1991-07-01), Fraser et al.
patent: 5727934 (1998-03-01), Sekita et al.
patent: 6079963 (2000-06-01), Endo et al.
patent: 59208187 (1984-11-01), None

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