HAND PUMP FOR PUMPING AIR OF LOWER PRESSURE AND HIGH PRESSURE
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United States of America Patent
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Issued Date -
Mar 9, 2017
app pub date -
Sep 9, 2015
filing date -
Sep 9, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A hand pump includes a receptacle having a compartment and a chamber, a tubular member engaged into the chamber and secured to the receptacle, a cylinder engaged onto the tubular member, a piston is engaged between the tubular member and the cylinder for forcing an air from a front space of the cylinder into the tubular member with a lower pressure, a lid is attached to the cylinder and a check valve controls the air to flow only from the outer environment into the cylinder, a control valve member is engaged in the lid for controlling the air to flow through the lid, and an actuator is attached to the lid and engaged with the control valve member for opening the hole of the lid and for releasing the air selectively.
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