Patent ID: 8746282
Filing Date: 2014-06-10
Classification: A61B,F16K,Y10T

Abstract:
1. A check valve assembly connected between an endoscope and a fluid supply source, comprising: a discharge nozzle unit supplied with fluid by said fluid supply source, said discharge nozzle unit including a large diameter portion, a small diameter portion disposed on a distal side of said large diameter portion, a flow channel formed through said large diameter portion and partially through said small diameter portion, and a fluid opening, formed in an outer surface of said small diameter portion, for communicating with said flow channel; an elastic tubular portion, disposed around said outer surface of said small diameter portion and said large diameter portion, for preventing said fluid thereabout from passing outside said small diameter portion toward said fluid opening, and for allowing said fluid to flow out through a clearance space outside said small diameter portion upon being pushed open by said fluid from said fluid opening; and a valve housing, connected with said endoscope, for containing said discharge nozzle unit with said elastic tubular portion, and for directing said fluid from said elastic tubular portion toward said endoscope, wherein said valve housing includes an engaging portion for rotationally regulating said discharge nozzle unit about an axis of an axial direction, wherein said engaging portion includes an engaging cutout formed at a proximal end of said valve housing in said axial direction, and wherein said discharge nozzle unit includes a regulating projection engaged with said engaging cutout.