Structure of hand pump
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 19, 2000
Grant Date -
N/A
app pub date -
Dec 3, 1998
filing date -
Dec 3, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hand pump includes a cylindrical casing having a top open side covered with a top cover and a bottom side provided with an air outlet, a handle inserted through a hole the top cover, and a piston moved with the handle up and down to pump air out of the cylindrical casing through the air outlet, wherein the handle has multiple peripheral sides and angles defining a plurality of longitudinal grooves equiangularly spaced around the periphery for guiding outside air into the cylindrical casing evenly upon an up stroke of the handle, and a wedge-like coupling rod at a bottom end thereof press-fitted into a coupling hole at the piston for enabling the piston to be reciprocated with the handle.
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Family
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Cited Art Landscape
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