Rotary expansible chamber devices – Working member has planetary or planetating movement – Plural working members or chambers
Reexamination Certificate
2006-02-21
2006-02-21
Freay, Charles G. (Department: 3746)
Rotary expansible chamber devices
Working member has planetary or planetating movement
Plural working members or chambers
C418S142000
Reexamination Certificate
active
07001162
ABSTRACT:
A guided rotor compressor that contains at least three hollow rollers, each of which has a sheath surrounding a core. The coefficient of friction of the sheath and the core is from about 0.01 to about 0.15, but the coefficient of friction of the core is at least 1.2 times as great as the coefficient of friction of the sheath. The core has a cross-sectional area that is at least about 1.5 times as great as the cross-sectional area of the said sheath. Each of the core and the sheath has a coefficient of thermal expansion of from about 1×10−5to about 20×10−5. Each of the core and the sheath has a a notch Izod impact strength of from about 50 Joule-meters to about 100 Joule-meters.
REFERENCES:
patent: 5391067 (1995-02-01), Saunders
patent: 5431551 (1995-07-01), Aquino et al.
patent: 5769619 (1998-06-01), Crvelin et al.
patent: 6676385 (2004-01-01), Choroszylow et al.
Aquino Giovanni
Choroszylow Ewan
Greenwald Howard J.
Freay Charles G.
Greenwald Howard J.
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