Gapless screw rotor device
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United States of America Patent
Stats
-
Mar 7, 2006
Grant Date -
Jun 16, 2005
app pub date -
Mar 27, 2004
filing date -
Oct 19, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
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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