Relief valve and pump cover
AssigneeMitsuba Corporation
InventorsHiroki Saito, Yusuke Fujita, Hiroshi Ooka, Masahiko Tsuchida
Life of this patent
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Abstract
The invention suppresses hysteresis. A relief valve switching between whether to discharge oil through movement of a valve body includes: a first spacing part, in which the valve body moves; a second space part, connected with the first space part and having a diameter smaller than a diameter of the first space part; an elastic body, connected with the valve body; a seal part, disposed in a circumferential direction of the valve body; and a third space part, formed in the first space part.
Claims8
A relief valve, switching between whether to discharge oil through movement of a valve body, the relief valve comprising:
- a first spacing part, in which the valve body moves;
- a second space part, connected with the first space part and having a diameter smaller than a diameter of the first space part;
- an elastic body, connected with the valve body;
- a seal part, disposed in a circumferential direction of the valve body;
- and
- a third space part, formed in the first space part,
- wherein the first space part and the second space part are connected at a first end of the first space part, and
- the seal part is disposed at a position that is a side surface with respect to a first surface formed on a side of the first end, among surfaces which the valve body has, in a vertical direction with respect to a direction in which the valve body moves reciprocally, and extends from the third space part to a boundary between the first space part and the second part.
Dependencies are inferred from the claim text.