Pneumatic sanding machine with automatic start-up of a dust extractor
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United States of America Patent
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Issued Date -
Dec 14, 2023
app pub date -
Jun 13, 2023
filing date -
Jun 14, 2022
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Abstract
A pneumatic sander includes a suction device and a connection module. The connection module includes: an internal pipe having an air inlet connectable to a compressed-air source; a first air outlet supplying the sander with air via a first air passage; a second air outlet supplying the suction device with air via a second air passage; and a movable obturator mounted in the internal pipe. On start up, the air source delivers compressed air in the first air passage to force the obturator against a spring element to enable airflow to pass to the first air outlet and then to the sander, and at the same time to allow airflow to pass to a motor of the suction device, causing the suction device to suck dust from the sander. When the sander is stopped, the spring element forces the obturator towards an idle position to close the air passages.
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