发明名称 |
Oil pump |
摘要 |
An oil pump has a pump body, an outer rotor, and an inner rotor. The pump body includes a rotor chamber, an inlet port and an outlet port formed in the rotor chamber, an inlet passage communicating with the inlet port, an outlet passage communicating with the outlet port, a relief valve, a relief chamber formed on a discharge side of the relief valve, and an oil return passage formed from the relief chamber to the inlet passage. The outer rotor is supported by the inner circumferential support wall of the rotor chamber. The oil return passage is formed in the inner circumferential support wall as a groove-like recess and opens along an outer circumferential surface of the outer rotor. |
申请公布号 |
US9416782(B2) |
申请公布日期 |
2016.08.16 |
申请号 |
US201414333157 |
申请日期 |
2014.07.16 |
申请人 |
YAMADA MANUFACTURING CO., LTD. |
发明人 |
Kan Yasuhiko;Taguchi Hiroyuki;Nishioka Sentaro |
分类号 |
F04C18/08;F01C21/18;F04C15/06;F04C29/12;F04C14/24;F04C2/08;F04C2/10;F04C14/26 |
主分类号 |
F04C18/08 |
代理机构 |
McGinn IP Law Group PLLC |
代理人 |
McGinn IP Law Group PLLC |
主权项 |
1. An oil pump, comprising:
a pump body; an outer rotor; and an inner rotor, the pump body including a rotor chamber having an inner circumferential support wall on an inner circumferential side, an inlet port and an outlet port formed in the rotor chamber, an inlet passage communicating with said inlet port, an outlet passage communicating with said outlet port, a relief valve allowing oil to flow from the outlet passage to said inlet passage by relieving pressure, a relief chamber formed on a discharge side of the relief valve, and an oil return passage formed from said relief chamber to said inlet passage; the outer rotor being supported by the inner circumferential support wall of said rotor chamber; and the inner rotor being arranged on an inner circumferential side of the outer rotor, wherein said oil return passage is formed in said inner circumferential support wall as a groove-like recess and opens along an outer circumferential surface of said outer rotor. |
地址 |
Kiryu-shj, Gunma JP |