Patent ID: 8297307
Filing Date: 2012-10-30
Classification: F16K,Y10T

Abstract:
1. A relief valve structure, comprising: a relief valve having formed therein a valve flow path for communicating between a valve head part and an outer circumferential side part; a valve housing in which a valve passage accommodating the relief valve is formed; a relief flow-in part formed on an axial direction at one end side of the valve passage and communicating with the valve passage; a first discharge part formed in the valve housing and communicating with the valve flow path by the movement of a relief valve; and a second discharge part that is opened by allowing the valve head part to pass therethrough, wherein the second discharge part is positioned nearer to the relief flow-in part than the first discharge part, and a shortest gap between an outer circumferential side part opening of the valve flow path and the first discharge part is the same as or shorter than a shortest gap between the valve head part and the second discharge part during an initial state of the relief valve, wherein a longest gap between the first discharge part and the second discharge part is the same as or shorter than a gap between a boundary position between an inclined surface part of the relief valve and the outer circumferential side part, and a section closest to the valve head part of the outer circumferential side part opening.