Fluoropolymer diaphragm with integral attachment device
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United States of America Patent
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-
May 15, 2001
Grant Date -
N/A
app pub date -
Jun 3, 1999
filing date -
Jun 3, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pump diaphragm includes a layer fabricated from polytetrafluoroethylene (PTFE) and an integral stud. In one embodiment, the stud is encapsulated within a hub assembly fabricated from PTFE and fastened to the PTFE layer with adhesive or welding, etc. In alternate embodiments, the stud may be molded in-situ with the PTFE layer using various methodology, including pressing the stud onto a heated PTFE layer. The PTFE layer then may be subjected to various forming operations to provide the diaphragm with desired dimensions and/or properties. Moreover, an additional layer or layers, such as an elastomeric layer, may be laminated onto an inside surface of the PTFE layer to provide a composite pump diaphragm.
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