Patent ID: 7913985

Claim:
A humidifier reservoir cap for providing a seal with an annular wall of a humidifier reservoir, the cap comprising: a top wall; a port defined by an annular wall having an outlet end that is recessed with respect to the top wall and is spaced radially inward of the top wall; an annular sealing wall extending axially from the top wall and spaced radially outward of the annular wall of the port, the annular sealing wall including an end portion that is configured to form a seal with the annular wall of the receptacle when the end portion is forced into engagement with the annular wall of the receptacle; a cam structure spaced radially outward of the sealing wall, the cam structure being configured to engage the humidifier reservoir and force annular sealing wall into engagement with the annular wall of the reservoir to provide the seal between the cap and the annular wall of the humidifier reservoir.