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US 6,648,615 B2Granted
Inflator
OwnerJohn Tsaiinventor
Life of this patent
Estimating the term…
Abstract
A dual-direction inflator has a tube and a cover mounted on the tube. A rod extends through the cover and is inserted in the tube. A piston is received in the tube and mounted on an end of the rod. The piston has an air-in chamber and an air-out chamber defined therein. A handle is mounted at the other end of the rod. The handle has an inlet and an outlet formed at a middle portion thereof. An inner tube is received in the rod and communicated with the inlet and with the air-in chamber. By a space defined between the inner tube and the rod, the air-out chamber is communicated with the outlet.
Claims8
An inflator comprising:
- a tube (10);
- a cover (20) mounted on a top of said tube (10);
- a rod (30) extending through said cover (20) and inserted in said tube (10);
- a piston (40) received in said tube (10) and mounted on a bottom end of said rod (30), said piston (40) having an air-in chamber (44) and an air-out chamber (46) defined therein, two first non-return valves (440, 442), by which air can flow in said tube (10) from said air-in chamber (44), respectively provided at a top and a bottom of said air-in chamber (44), and two second non-return valves (460, 462), by which air can flow in said air-out chamber (46) from said tube (10), respectively provided at a top and a bottom of said air-out chamber (46);
- a handle (50) mounted at a top end of said rod (30), said handle (50) having an inlet (52) and an outlet (54) oppositely formed at a middle portion thereof;
- an inner tube (32) received in said rod (30), said inner tube (32) having an upper notch (320) defined at a top end thereof and communicated with said inlet (52), and a lower notch (322) defined at a bottom end thereof and communicated with said air-in chamber (44);
- and
- a space defined between said inner tube (32) and said rod (30), said space being in communication with said air-out chamber (46) and said outlet (54).
5 more elements
Dependencies are inferred from the claim text.