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
Semiconductor device and method of adjusting characteristic thereof
Obviation of recovery of data store consistency for application I/O errors
Lacrosse head
Nuclear fission reactor, a vented nuclear fission fuel module, methods therefor and a vented nuclear fission fuel module system
Security patch update processor
Camera system, video processing apparatus, and camera apparatus
Lithographic apparatus and device manufacturing method
  Randomly Featured Patents
Fence for retaining pets in cars
Drying apparatus incorporating an air-moistening device
Combustion chamber
Simplified query generation from prior query results
Magnetic centre-finding device with no magnet on the rotor and with small air gap
Film thickness measurement method, epitaxial wafer production process and epitaxial wafer
Wood chipping apparatus
Optical disk device with means for adjusting writing focus offset
Apparatus and systems for integration of a central tire inflation system manifold into a wheel
Car wash system using reverse osmosis concentrate for initial rinsing and permeate for final rinsing