Resources Contact Us Home
Metering pump

Image Number 4 for United States Patent #4415314.

A fluid pump for location within a reservoir and which is operable with rise and fall of liquid within the reservoir. The pump comprises a tube of a resiliently deformable material, an abutment surface which is engaged by the tube and a float device which is mounted to the tube. Liquid entering the reservoir causes upward movement of the float device and such movement of the float device causes increasing engagement between the tube and the abutment surface. The increasing engagement between the tube and the abutment surface causes the tube to deform resiliently and a localized reduction in the contained volume of the tube is thereby effected to cause expulsion of fluid from the tube. Conversely, as the liquid level falls in the reservoir, the float device moves downwardly to reduce the extent of engagement between the tube and the abutment surface, so that the tube tends to resume its initial contained volume.

  Recently Added Patents
Systems and methods to provide communication history for communication devices
Video reproducing apparatus and video reproducing method
Address generation unit for accessing a multi-dimensional data structure in a desired pattern
Fabrication method of packaging substrate having through-holed interposer embedded therein
Measuring current and resistance using combined diodes/resistor structure to monitor integrated circuit manufacturing process variations
Simultaneous enhancement of transmission loss and absorption coefficient using activated cavities
  Randomly Featured Patents
Streaming object instantiation using bookmarks
Set of place mats
Method and apparatus for reducing C2 and C3 at LNG receiving terminals
Vehicle upper grille
Gardening applicator for delivering liquid chemicals to selected vegetation
Computer keyboard
Circuit breaker contact arm and attachment means
Method of manufacturing an integrated optical component comprising a thick waveguide coupled to a thin waveguide
NPN heterojunction bipolar transistor including antimonide base formed on semi-insulating indium phosphide substrate