Patent attributes
A closure assembly for a drinking cup includes an annular body, with a rim for drinking, mountable to a cup. A closure member, having apertures, is disposed within the body and extends across the cup. A sealing element, on an inner side of the closure member, and an actuator, on the opposite side of the closure member, are coupled to each other with the sealing element biased into a rest position in which it is urged against the inner side of the closure member to block the apertures and prevent liquid flow therethrough. The sealing element moves out of the rest position to allow liquid flow through the apertures when pressure sufficient to overcome the bias is applied to the actuator. The closure member includes a diaphragm that is integrally formed with a biasing member to bias the sealing element into the rest position.
