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
Cryptographic authentication apparatus, systems and methods
System and method for automated web site information retrieval scripting using untrained users
Providing dispersed storage network location information of a hypertext markup language file
Providing a motion image in an ultrasound system
Gas insulator switchgear
Method and system for automatically measuring and forecasting the demographic characterization of customers to help customize programming contents in a media network
  Randomly Featured Patents
Matrix display devices with interconnected diode ring circuit providing fault tolerance
Electronic device with email function and method for setting email account of electronic device
Modular animal imaging apparatus
Customer support system using internet
Speech recognition apparatus using neural network and fuzzy logic
Thin laminate construction for the creation of tactile feedback
Boom arrangement for a scaling device and scaling device
Phenazine dyes
Control of belt-drive continuously variable transmission
Retortable plastic containers