Patent ID: 8403170
Filing Date: 2013-03-26
Classification: F15B,F17C

Abstract:
1. A pressure vessel comprising: an outer container unit having a surrounding wall that surrounds an axis, and first and second end walls that are spaced apart from each other along the axis and that cooperate with said surrounding wall to define an inner space, said surrounding wall having a first supporting portion and a second supporting portion, said first supporting portion being disposed between said second supporting portion and said first end wall; a lining container disposed inside said outer container unit and disposed to contact said first end wall and a portion of said surrounding wall, and having an end portion that corresponds in position to said first supporting portion; an elastic diaphragm disposed in said inner space, and dividing said inner space into an air chamber and a water chamber that corresponds to said lining container, said diaphragm having a retaining sector that corresponds in position to said end portion of said lining container, and an extending sector that is connected to said retaining sector and that corresponds in position to said second supporting portion of said surrounding wall; and a pressing member surrounding the axis, disposed in said air chamber, and having a first pressing segment that presses tightly said retaining sector of said diaphragm and said end portion of said lining container against said first supporting portion of said surrounding wall, and a second pressing segment that presses tightly said extending sector of said diaphragm against said second supporting portion of said surrounding wall; wherein: each of said first supporting portion of said outer container unit, said end portion of said lining container, said retaining sector of said diaphragm, and said first pressing segment of said pressing member is annular and inwardly-curved; said surrounding wall of said outer container unit further has a third supporting portion formed at one side of said second supporting portion opposite to said first supporting portion along the axis; said diaphragm further has a stop sector connected to said extending sector and corresponding in position to said third supporting portion of said surrounding wall of said outer container unit; said pressing member further has a third pressing segment connected to said second pressing segment, corresponding in position to said stop sector of said diaphragm, and pressing said stop sector of said diaphragm on said third supporting portion of said surrounding wall of said outer container unit; and each of said third supporting portion of said outer container unit, said stop sector of said diaphragm, and said third pressing segment of said pressing member is annular and inwardly-curved.