Resources Contact Us Home
Biaxial scissors fold, post tensioned structure

Image Number 4 for United States Patent #4539786.

A structure capable of being expanded and retracted. The structure includes a pair of cells each including a plurality of leg elements which are pivotally joined at one end to form an apex point and which are pivotally joined at their opposite ends from the apex point connection to the corresponding leg element from the other cell to form a plurality of common base points. The structure also includes a plurality of hinged elements connected between adjacent common base points to thereby form a common base and the hinged elements each have a pair of sections that are connected at a hinge point approximately midway between the adjacent common base points to which the other end of each section is connected. The structure further includes an actuator means having its ends pivotally attached to the apex points and a means associated with the actuator means for biasing the apex points to which the actuator means is attached towards and away from each other whereby the leg elements pivot about the apex points and the base points, the sections of the hinged elements pivot about the base points and the hinge points to thereby expand or retract the structure, respectively.

  Recently Added Patents
Post-processing including median filtering of noise suppression gains
Verifiable service policy implementation for intermediate networking devices
Method for transmitting an electronic short message to multiple receivers
System or method to assist and automate an information security classification and marking process for government and non-government organizations for information of an electronic document
Methods and apparatus for adapting network characteristics in telecommunications systems
Dithering method and apparatus
Resource capacity monitoring and reporting
  Randomly Featured Patents
High-security IC card
Method of detecting torque phase start in clutch to clutch speed shift of vehicular automatic transmission, method of detecting torque interference intensity and shift control apparatus of veh
Light emitting diode driving apparatus and method for holding driving voltage thereof
Modular X-ray inspection apparatus
Fluorine-free fused ring heteroaromatic photoacid generators and resist compositions containing the same
Closed loop fat transplantation system
Coaxial coupling
T-lymphotropic retrovirus monoclonal antibodies
Process for preparing glycide by epoxidation using polymeric organosiloxane ammonium salts of oxoacids of the elements V, Nb, Ta, Mo, and W
Vehicle security system