Patent ID: 9470324
Filing Date: 2016-10-18
CPC Classification: F16K,Y10T

Claim Text:
1. A valve comprising: an axially movable spool having a conical valve portion and dissipating disk portion; a valve housing defining a valve cavity in which the spool resides; a first port in the valve housing configured to provide fluid communication from outside the valve housing to the valve cavity; a second port in the valve housing configured to provide fluid communication from outside the valve housing to the valve cavity; a land defined by the housing to provide a small tolerance between the land and the disk portion when the spool is in a position to cause the disk portion to be proximate to the land; a wide portion in the housing to provide a large tolerance between the land and the disk portion when the spool is in a position to cause the disk portion to be proximate to the wide portion; and a valve seat defined, at least in part, by the valve housing configured to form a seal with the conical valve portion when the spool is in a position to cause the conical valve portion to be pressed against the valve seat, and the disk portion, the land, the wide portion, the conical valve portion, and the valve seat are dimensioned to cause the disk portion and the land to be closer to each other but still define a passageway for fluid flow between the disk portion and the land when the valve portion is contacting the valve seat then when the valve portion is away from the valve seat.