FLAPPER VALVE FOR PERCUSSION DRILL TOOLS
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United States of America Patent
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Issued Date -
Sep 28, 2023
app pub date -
Aug 18, 2021
filing date -
Aug 19, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a flapper valve for a percussion drill tool. The valve comprises a first side engageable with a planar surface of an element of the percussion drill tool to alternately close first and second fluid flow paths of the percussion drill tool. The planar surface comprises first and second apertures in fluid communication with the first and second fluid flow paths, respectively. The first side of the flapper valve comprises a first planar portion and a second planar portion and a first curved tip portion intermediate the first and second planar portions. The flapper valve is pivotable about the first curved tip portion between a first position, in which the first planar portion of the flapper valve is in sealing contact with the planar surface to close the first aperture, and a second position, in which the second planar portion of the flapper valve is in sealing contact with the planar surface to close the second aperture.
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