Variable pressure air pump
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United States of America Patent
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Oct 27, 2020
Grant Date -
N/A
app pub date -
Aug 16, 2018
filing date -
Aug 16, 2018
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A variable pressure air pump includes a first cylinder and a second cylinder movable relative to the first cylinder along a longitudinal axis. An air tube is mounted in the first and second cylinders. A mounting portion is integrally formed on a first end of the air tube. A first piston and a second piston compress air in the first and second cylinders. A connecting device is mounted to the first cylinder for coupling with an object to be inflated. An air escape device selectively seals a second chamber of the second cylinder to selectively compress the air in the second cylinder. A first check valve is mounted to the mounting portion of the air tube. A second check valve is mounted to the second piston.
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