Rolling diaphragm construction and piston-cylinder assembly including same particularly useful for suction or compression pumps
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 4, 1988
Grant Date -
N/A
app pub date -
Mar 26, 1987
filing date -
Mar 26, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rolling diaphragm for attachment between a piston and a cylinder, comprises: an inner radial section of circular configuration attachable to the piston, an outer annular skirt attachable to the cylinder, and a rolling wall between said inner radial section and said outer annular skirt. The inner face of the juncture of the inner radial section with the rolling wall is formed with an annular bead receivable within an annular groove formed in the piston for securing the inner radial section of the rolling diaphragm thereto independently of other fastening means. In addition, the outer annular skirt is formed at an intermediate portion of its outer face with an annular groove receivable over the end of an annular wall of the cylinder for clamping the outer annular skirt between the annular wall and an end wall of the cylinder, also independently of other fastening means.
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