Structure of pump
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United States of America Patent
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Dec 29, 2015
Grant Date -
Jan 15, 2015
app pub date -
Jul 9, 2013
filing date -
Jul 9, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A pump includes a cap that is fit into an opening of a pump body. The pump body has an external thread formed on an outer circumference close to a top face thereof for engagement with and coupling to a rotatable fixing ring having an internal thread so as to retain a cap from top side thereof. The threading engagement along the circumference fixes the cap and the pump body together. The cap has an underside from which a projecting ring extends downward. The projecting ring has a thread. A piston cylinder has an end forming a thread engageable with the thread of the projecting ring to complete the assembling of the piston cylinder.
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