Resources Contact Us Home
Floatation device

Image Number 10 for United States Patent #7841917.

A floatation device is disclosed that comprises a container 10 containing a liquefied gas, a gas chamber (60, FIG. 2) and a remotely operable device 29. The remotely operable device is switchable between a closed state in which fluid communication between the container and the gas chamber is prevented, and an open state in which fluid communication between the container and the gas chamber is enabled and vaporization of the liquefied gas charges the gas chamber with gas. The liquefied gas may be liquid nitrogen and the container may be heat insulated with an insulating vacuum cavity. A buoyancy unit (40, FIG. 2) which comprises a rigid enclosure (42, FIG. 2) defining an interior volume and a flexible diaphragm (55, FIG. 2) that partitions the interior volume into first and second chambers is also disclosed.

  Recently Added Patents
Using rule induction to identify emerging trends in unstructured text streams
Flash memory apparatus and method for generating read voltage thereof
Oxidative coupling of hydrocarbons as heat source
Sealing member for piezoelectric resonator device, and piezoelectric resonator device
Image processing apparatus and image processing method
RFID reader revocation checking using low power attached displays
  Randomly Featured Patents
Electrostatic powder painting apparatus
Method for infrared-optical determination of the concentration of at least one chemical analyte in a liquid sample
Designer proteases
Portable restroom
Photosensitive redox solutions
Discharge pressure actuated pump
Antagonists of the bradykinin B1 receptor
Soybean variety XB55W11
Alkyl-substituted phenylcarbamate derivative of polysaccharide
Offset mountable accessory