Resources Contact Us Home
Portable acoustic shell

Image Number 3 for United States Patent #5651405.

An improved collapsible stage panel assembly having a base, a vertical panel rigidly attached to the base, an intermediate panel pivotally connected to the top of the rigid vertical panel, a canopy panel pivotally connected to the intermediate panel and a kicker panel pivotally connected to the bottom of the rigid vertical panel. The stage panel assembly has a mechanical assisting device between the rigid vertical panel and the intermediate panel to provide a counter balancing force against the combined weights of the intermediate and canopy panels. A second mechanical assisting device extends between the intermediate panel and the canopy panel to provide a counter balancing force against the weight of the canopy panel. An automatic locking device provides for the locking of the intermediate panel in its extended position relative to the rigid vertical panel when the intermediate panel is placed in its extended position. The improved panel assembly allows for easier conversion between the extended configuration of the panel assembly suitable for combination with other such assemblies to form an acoustic reflecting shell and the folded storage configuration where the panels can be nested together for storage in a minimum of space.

  Recently Added Patents
Liquid-level sensor
Detection of bioagents using a shear horizontal surface acoustic wave biosensor
Apparatus and method for performing lawful intercept in group calls
Polarity switching member of dot inversion system
Smart television system having methods or means for accessing paid or subscribed digital content from the internet
Graphical communication user interface with graphical position user input mechanism for selecting a display image
Establishing a graphical user interface (`GUI`) theme
  Randomly Featured Patents
Drive system for vehicles with at least two drivable vehicle axles
Placeholder-based design flow for creating circuit designs for integrated circuits
Electronic device, unlocking method, and program
Sulfur oxide/nitrogen oxide trap system and method for the protection of nitrogen oxide storage reduction catalyst from sulfur poisoning
Electronic timepiece with electro-optic display
Dispenser of powder/granules
Combined ablation and exposure system and method
Installation for electron-ray coatication of coatings
Tin (II) stabilizer for hydrogen peroxide
Chin and neck exerciser