Importance

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Abstract

A buffered valve having a longitudinal passage leading to a valve chamber. The valve chamber is divided by a spacer into a front and rear chamber which are connected by a port in the spacer. A normally closed main valve member is in the front chamber which blocks the longitudinal passage. A sub-valve which has a vessel or cup-like configuration is in the rear valve chamber and is biased toward the port in the spacer by a coil spring. The sub-valve has a through hole which is blocked by a check valve. Adjustable passages are provided for connecting between the front and rear chambers of the valve. When the main valve opens, the flow of fluid from behind the main valve member to the rear chamber is restricted by the port in the spacer and the sub-valve assembly to provide a buffered valve action. When the main valve is closing, the flow of fluid is again restricted by the passage in the sub-valve and the port in the spacer to provide a buffered action. The main valve member has an attached buffer member which substantially interferes with the flow of fluid through the longitudinal passage increasing the buffering action.

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First Claim