Patent ID: 6776312
Filing Date: 2004-08-17
Classification: B05B

Abstract:
An actuating head of a double-acting pump for ejecting a product from a container, the actuating head comprisingan outlet duct leading to an ejection opening and a valve closing piece arranged in the outlet duct, the valve closing piece forming together with the outlet duct a check valve which, when the actuating head is actuated, is opened by pressure of the product against an elastic force so as to allow the product to flow into a space defined by an inner side of the outlet duct and a circumference of the valve closing piece, the space being connected through at least one transverse groove to the ejection opening, the valve closing piece being of a rubber-elastic material which is elastically deformed by the product pressure when the actuating head is actuated so as to open the check valve, the valve closing piece bordering with an end face thereof against the at least one transverse groove and resting with a rear side thereof against a radially inwardly protruding shoulder of the outlet duct, the rear side of the valve closing piece having at least one radial groove and a portion of the outlet duct located on the rear side of the valve closing piece being configured to be connected through the at least one radial groove to the space, and the valve closing piece having a circumferential sealing lip for producing the elastic force and for releasing the flow of the product as a result of the product pressure when the actuating head is actuated.