Rotary expansible chamber devices – Interengaging rotating members – Helical or herringbone
Patent
1985-12-16
1987-06-16
Croyle, Carlton R.
Rotary expansible chamber devices
Interengaging rotating members
Helical or herringbone
418150, F04C 1816
Patent
active
046733442
ABSTRACT:
Helical screw rotors for a screw rotor machine having improved profiles on both male and female rotors, wherein the female rotor leading and trailing flanks comprise first and second circular arcs with the first circular arc subscribed by a first radius whose center lies inside the pitch circle and a second circular arc subscribed by a second radius whose center also lies inside the pitch circle. The leading and trailing flank portions of the male rotor are travel generated by first and second radii on the female rotor resulting in effective driving and driven lobe surfaces on the leading and trailing lobe surfaces. This also results in minimized blowholes and effective sealing surfaces on the intake and discharge sides of the screw rotor machine. The female rotor lobes have a main peripheral surface defined by a true circular arc swung from the axis of the female rotor.
REFERENCES:
patent: 4088427 (1978-05-01), Emanuelsson
patent: 4350480 (1982-09-01), Bammert
patent: 4401420 (1983-08-01), Kasuya
patent: 4435139 (1984-03-01), Astberg
patent: 4460322 (1984-07-01), Schibbye
patent: 4508496 (1985-04-01), Bowman
patent: 4527967 (1985-07-01), Ingalls
patent: 4576558 (1986-03-01), Tanaka
patent: 4583927 (1986-04-01), Shigekawa
Croyle Carlton R.
Obee Jane E.
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