AUTOMATIC PILOT VALVE SYSTEM FOR FOUNDATION TOOLING
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United States of America Patent
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N/A
Issued Date -
Jun 13, 2024
app pub date -
Nov 8, 2023
filing date -
Dec 12, 2022
priority date (Note) -
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status (Latency Note)
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Abstract
The present application is directed to an automatic pilot valve (APV) system for foundation tooling, such as a continuous flight auger (CFA) or displacement tool structured to include a pilot tip receiving housing in communication with a cement supply in which when the pilot tip is in the retracted position while drilling operations are being performed, the pilot tip shaft blocks the flow of cement into the drilled hole. When the APV equipped CFA is being lifted out of the drilled hole, the APV pilot shaft slides outwardly simultaneously exposing one or more cement ports allowing cement to flow. The APV can include a one-piece machined, cast or forged valve housing, or manufactured by welding steel components into a multi-piece valve housing. The APV can be deployed externally by attachment to the outside of foundation or displacement tool stems or internally by installation inside of foundation or displacement tool stems.
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