Rotary expansible chamber devices – Interengaging rotating members – Helical or herringbone
Reexamination Certificate
2006-03-07
2006-03-07
Trieu, Theresa (Department: 3748)
Rotary expansible chamber devices
Interengaging rotating members
Helical or herringbone
C418S104000, C418S142000
Reexamination Certificate
active
07008201
ABSTRACT:
A screw rotor device has a housing with an inlet port and an outlet port, a male rotor with helical threads, and a female rotor with helical grooves. The helical threads and helical grooves are designed to eliminate the blow hole leak pathway for multiple-pitch screw rotor devices as well as single-pitch screw rotor devices. The male rotor has a pair of helical threads with a phase-offset aspect, and the female rotor has a corresponding pair of helical grooves. The female rotor counter-rotates with respect to the male rotor and each of the helical grooves respectively intermeshes in phase with each of the helical threads. The phase-offset aspect of the helical threads is formed by a pair of teeth bounding a toothless sector.
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www.matteicomp.com/about/screwcompressors/page1.htm, dated Mar. 24, 2004 Mattei Compressors, Inc. IN-DEPTH p. 7.
A New Rotary Compressor, by A.J.R. Lysholm, M.I. Mech.E.; pp 11-21.
Donahue, III Dennis JM
Husch & Eppenberger LLC
Imperial Research LLC
Trieu Theresa
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