Shuttle valve for concrete pump
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 3, 2002
Grant Date -
N/A
app pub date -
Feb 14, 2000
filing date -
Feb 14, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A shuttle valve for use in a pumping apparatus for pumping concrete or the like. The valve uses belleville springs to hold a wear ring against the concrete hopper, thereby creating a seal.
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