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
Method and system for Bluetooth low power link layer connection setup
Sweetener compositions having enhanced sweetness and improved temporal and/or flavor profiles
Nano-pigment inkjet ink composition that has a low odor and is environmentally-friendly
System and method of error reporting in a video distribution network
Denial of service (DoS) attack prevention through random access channel resource reallocation
Liquid crystal shutter glasses
Newly identified human rhinovirus of HRV-C and methods and kits for detecting HRV-Cs
  Randomly Featured Patents
Substituted phenyl amidinoureas
Function block architecture for gate array
Primary hydroxyl-containing phosphono-s-triazines
Process for minimizing toner usage in minimum area coverage patches and minimizing toner churning
Cheese-flavored substance and method of producing same
Food package
System and method for insulating items using a reflective or inflatable insulation panel
Rotary valve with stem seal means
Arrangement for operating a friction clutch of a motor vehicle, in particular of a truck