| 摘要 |
<p>This check valve (V1) for a negative-pressure type booster is equipped with a valve housing (10) which has passages (Pa, Pb) and a valve seat (12b), a valve body (20) which is incorporated in the valve housing (10), and a valve spring (30) which biases the valve body (20) toward the valve seat (12b), said check valve (V1) being attached to a negative-pressure introduction section of the negative-pressure type booster (100). A single-swing means, which causes the valve body (20) to incline with respect to the valve seat (12b) when the valve body (20) separates from the valve seat (12b), is set on this check valve (V1) for a negative-pressure type booster. The single-swing means is set in the passages (Pa, Pb) of the valve housing (10), and passage (Pb), which is located on the side closer to a negative-pressure source than the valve body (20) installed in the valve housing (10), is decentered by a predetermined amount from passage (Pa), which is located on the side closer to the negative-pressure type booster than the valve body (20) and is arranged coaxially with the valve body (20). Consequently, vibration of the check valve for a negative-pressure type booster when is the valve is closed can be effectively suppressed.</p> |
