Resources Contact Us Home
Floatation device

Image Number 4 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
Business flow processing method and apparatus
High frequency vertical spring probe
Method and apparatus for error correction in MBMS receipt system
Method for adapting a contact point of a clutch in a drivetrain of a motor vehicle
Lubricant coating device and image forming apparatus
Image forming apparatus
  Randomly Featured Patents
Award plaque
Impact hammer power tool
Control circuit for an inverter operable in an individual mode and an interconnection mode
Support for a printed circuit board with electronic components
Organic additives for improved lifetimes in organic and solution processible electronic devices
Checksum writing method and checksum checking apparatus
Method and device for improved alignment of a high brightness charged particle gun
Methods and apparatus in finite field polynomial implementations
Method of forming copper wire
Paper machine controller for operating slices and method of controlling the same