Patent ID: 7758476

Claim:
An inflatable cushion bag for striking comprising: a. an outer wall of flexible material; b. an inner wall is placed inside the outer wall; c. a first radial wall and a second radial wall are placed between the outer wall and the inner wall at a first end and a second end of the outer wall respectively, d. intermediate radial walls are placed between the first radial wall and the second radial wall; wherein the inner wall is joined and sealed at its ends with the first radial wall and the second radial wall so that air cannot leak out from end seams; e. intermediate seams joined by the inner wall and the intermediate radial walls respectively, sealable so that airflow may be blocked between air chambers through the seam or not sealed to let some air pass, whereby allowing an opening at the seam for the air to pass through from one chamber to another makes the chambers softer on their striking surface, wherein a supporting pole fits through the first radial wall and the second radial wall, wherein the supporting pole fits inside the inner wall which is shaped to define a sleeve for receiving the supporting pole; wherein the inner wall is shaped to define a cylindrical sleeve cavity passing through a central axis of the inflatable cushion bag; wherein the intermediate radial walls further comprise at least one intermediate radial wall having an air passage hole for air communication between chambers.