Dual duty hand pump
AssigneeJiao Hsiung Industry Corp.
InventorChui-Ching Yang
Life of this patent
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Abstract
A dual duty hand pump has two air channels, a hand grip, a piston rod, a piston, a deflating unit and an inflating unit. The hand grip and the piston are mounted on two ends of the piston rod. The deflating unit and the inflating unit are respectively mounted in the air channels and respectively have two check valves mounted therein in two opposite directions. When the hand grip is lifted and pressed down, air respectively flows in and flows out of the hand pump through the air channel. Accordingly, the hand pump provides a practical and convenient solution to integrate inflating and deflating functions as a whole for users to flexibly select from when the dual duty hand pump is in use.
Claims18
A dual duty hand pump, comprising:
- a hand grip;
- a pump body being hollow and having:
- a through hole formed through one end of the pump body and adapted to communicate with outside of the pump body;
- and
- an air inlet and an air outlet channel through the other end of the pump body and adapted to communicate with outside of the pump body;
- a piston rod mounted in the pump body and through the through hole of the pump body, wherein one end of the piston rod is connected with the hand grip;
- a piston securely mounted on the other end of the piston rod and having a seal ring sealed against an inner wall of the pump body;
- a deflating unit mounted in the air inlet channel and having:
- a check valve through which air flows in a first direction, the check valve having:
- a valve seat being hollow and having a valve gate formed on and protruding radially from an inner wall of the valve seat to partition an inner space of the valve seat into an upper compartment and a lower compartment;
- an air vent cover mounted in the upper compartment and having:
- an air vent hole formed through the air vent cover;
- and
- multiple stoppers formed on and protruding from one side of the air vent cover facing the valve gate, and spaced with an interval between each other;
- and
- a valve plate movably mounted between the stoppers and the valve gate;
- and
- a connection ring securely mounted in the air inlet channel, being adjacent to a bottom opening of the air inlet channel, and having a threaded hole adapted to engage an air pin;
- an inflating unit mounted in the air outlet channel and having:
- a check valve through which air flows in a second direction opposite to the first direction;
- and
- a connection ring securely mounted in the air outlet channel, being adjacent to a bottom opening of the air outlet channel, and having a threaded hole adapted to engage an air pin.
Dependencies are inferred from the claim text.