Internal gear type oil pump rotor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Oct 26, 2006
app pub date -
Oct 29, 2003
filing date -
Oct 29, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An oil pump rotor assembly includes an inner rotor (20) having 'n' external teeth ('n' is a natural number), and an outer rotor (10) having (n+1) internal teeth which are engageable with the external teeth, the oil pump rotor assembly being used in an oil pump which, during rotation of the inner and outer rotors (20, 10), draws and discharges fluid by volume change of cells (R) formed between the inner and outer rotors (20, 10). The oil pump rotor assembly is configured such that a clearance, which is defined between the teeth of the inner and outer rotors (20, 10) that together form one of the cells (R) which has the minimum volume among the cells, is designated as 'a', a clearance, which is defined between the teeth of the inner and outer rotors (20, 10) that together form one of the cells (R) whose volume is increasing during rotation of the inner and outer rotors (20, 10), is designated as 'b', and a clearance, which is defined between the teeth of the inner and outer rotors (20, 10) that together form one of the cells (R) which has the maximum volume among the cells, is designated as 'c', the following inequalities are satisfied: a.ltoreq.b.ltoreq.c, and a.ltoreq.c.
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