Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Device and method for arranging vials
Escalating data backup protection in response to a failure in a cluster of nodes
Method for dynamic multi-level pricing for wireless communications according to quality of service
Method of forming a semiconductor package
Bipolar transistor with diffused layer between deep trench sidewall and collector diffused layer
Liquid crystal shutter glasses
Lookup front end packet input processor
  Randomly Featured Patents
Vehicle with carriage anti-tilting structure
Multi-color development system
Camera remote control
Method and apparatus for processing sheets
Method for testing semiconductor integrated circuits soldered to boards and use of a transistor tester for this method
Windings for electrical inductive apparatus
Apparatus and method for compensating the drift of a local clock used as sampling frequency
Apparatus for removing tie wires from bales
Network with secure communications sessions
Wound protecting device