Abstract: An air valve connecting device or attachment includes a housing having an inlet mouth, a sliding member slidably engaged in the housing and extendible out of the housing, the sliding member includes two pathways and two chambers communicating with each other, two gaskets are engaged into the chambers of the sliding member respectively for engaging with different inflation valves, and the outer peripheral walls for forming the chambers of the sliding member are compressible to engage with the gaskets and to grasp and retain the inflation valves and the gaskets in the chambers of the sliding member respectively when either of the outer peripheral walls is engaged into the housing.

Abstract: A sliding inflator with inner and outer cylinders is provided. The outer cylinder has a fixing element with an axial pipe protruding therefrom and having two through holes. A rotating element is disposed around the axial pipe and has two receiving chambers matching the through holes, respectively, and receiving a ball each. A gradually-deepened curved portion of the receiving chamber is defined between shallow and deep ends thereof. The rotating element rotates between an unlocked position and a locked position. A stopping element is fixed to the inner cylinder and has a protruding post with an annular groove. The rotating element switches from the unlocked position to the locked position to couple the cylinders together, and switches from the locked position to the unlocked position to release engagement between the cylinders.