Check valve
OwnerMotoaki Okuda, Hajime Kurita +1inventors
InventorsMotoaki Okuda, Hajime Kurita, Masakazu Murase
Life of this patent
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Abstract
The check valve includes a valve housing, a valve body and an urging member. The valve housing has a peripheral wall and a valve seat. The peripheral wall has an opening therethrough for fluid communication. The opening is located more downstream than the valve seat. The end of the opening on the side of the valve seat is spaced at a predetermined length in a direction in which the valve body is spaced away from the valve seat. A first throttle is formed in a space between an inner peripheral surface of the valve housing and an outer peripheral surface of the valve body until the valve body is slid in the direction for the predetermined length from the state in which the valve body is seated on the valve seat.
Claims11
A check valve comprising:
- a valve housing having a peripheral wall and a valve seat, the peripheral wall having an opening therethrough for fluid communication, the opening being located more downstream than the valve seat, the peripheral wall also having an inner peripheral surface;
- a valve body disposed slidably in the valve housing, the valve body having an outer peripheral surface which is fitted in the inner peripheral surface of the valve housing, the valve body also having a sealing surface which is seated on the valve seat when the valve body is slid in a first direction, the sealing surface being spaced away from the valve seat when the valve body is slid in a second direction which is opposite to the first direction;
- and
- an urging member disposed in the valve housing for urging the valve body in the first direction,
- wherein the end of the opening on the side of the valve seat is spaced at a predetermined length in the second direction from the valve seat, a first throttle being formed in a space between the inner peripheral surface of the valve housing and the outer peripheral surface of the valve body until the valve body is slid in the second direction for the predetermined length from the state in which the valve body is seated on the valve seat.
Dependencies are inferred from the claim text.