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Leak-preventing device for a pump

Title: Leak-preventing device for a pump.
Abstract: Disclosed is a pump with a shell, an air-pumping device, a cover and a leak-preventing device. The air-pumping device is used to pump air out of the shell and therefore pump liquid into the shell. The cover includes an opening and channel defined therein. The shell is in communication with the exterior via the opening and in communication with the cylinder via the channel as the cover is attached to the shell and the cylinder. The leak-preventing device is connected to the cover. The channel is normally released from the leak-preventing device as the pump is located in an upright position. The channel is blocked by the leak-preventing device as the pump is located in an inverted position. ...
USPTO Applicaton #: #20120301339
Inventors: Tien-tsai Tseng

The Patent Description & Claims data below is from USPTO Patent Application 20120301339, Leak-preventing device for a pump.

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stats Patent Info
Application #
US 20120301339 A1
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Pumps   Expansible Chamber Type   Pumping Member Position Controlled Port  

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