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
Plants and seeds of corn variety CV577261
Organic light-emitting display with black matrix
Measuring current and resistance using combined diodes/resistor structure to monitor integrated circuit manufacturing process variations
Micro-fluidic device
Taste receptors of the T1R family from domestic cat
Event-triggered server-side macros
Semiconductor device having a bonding pad and shield structure of different thickness
  Randomly Featured Patents
Method of and apparatus for processing film
Resource selection in a communication network
Dual plate apparatus for empanada making device
Low cost substrate for an integrated circuit device with bondpads free of plated gold
Dead-time effect compensation for pulse-width modulated inverters and converters
Membrane switch for hopper
Adrenergically-mediated weight loss product
Semiconductor memory device having stacked-type capacitor of large capacitance
Oral care implement
Image detection processor and image detection processing method