Portable air pump

Details Portable air pump Portable air pump

2011-08-30

2011-08-30

Kramer, Devon C (Department: 3746)

Pumps

Expansible chamber type

Valved piston

Reexamination Certificate

active

08007258

ABSTRACT:
A portable air pump includes a tubular body, a barrel, a piston mechanism, a head, and a dispensing head. The tubular body has an upper cover having air inlet holes and a sealed bottom cover. The barrel has an air passage running through it along its axis direction. The piston has a center hole and a through hole, and a check valve is in positioned between the second end of the barrel and the bottom end of the piston. As the tubular body is moved in relation to the barrel away from the head, air flows into the tubular body through the air inlet holes and to the bottom of the tubular body through the through hole. Air is prevented from flowing out through the center hole of the piston by use of a check valve disc. As the tubular body is moved in relation to the barrel towards the head, air in the bottom of tubular body flows into the air passage of the barrel through the center hole, and out through the head and the dispensing head.

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patent: 2006/0272497 (2006-12-01), Adams
patent: 2007/0110589 (2007-05-01), Marafino

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