Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Nine lining structure










Image Number 6 for United States Patent #4382722.

The roof support according to the invention is between the roof-bar (2) and the sill piece (1) with at least one system of levers (3,4) connected by articulation with each other and connected by articulation with the roof-bar (2) and the sill piece (1) so that they have the form of a lying letter V directed with its vertex towards the fall. Between the levers (3,4) it is provided with the hydraulic cylinder (5) spragging the levers (3,4) and thus the lining. That admits to achieve a high multiplication of the cylinder travel in relation to the change of the lining height, and a multiplication of forces. In shield roof supports of a lemniscate type the lever system can consist of the fall shield (6) and the outside arm (7) of the lemniscate arrangement.








 
 
  Recently Added Patents
Device in a system operating with CAN-protocol and in a control and/or supervision system
Polypeptide microparticles
Lid for a container
System and method for dynamic quality-of-service-based billing in a peer-to-peer network
Media processing method and device
Method of optimizing air mover performance characteristics to minimize temperature variations in a computing system enclosure
Side portion of a circular saw blade
  Randomly Featured Patents
Basic expert system tool
Digital audio disc player
Current switched Josephson junction memory and logic circuits
Snap-on shroud for caster
Endpoint control for small open area by RF source parameter Vdc
Position insensitive low resistance aspirator
Optical component mounting apparatus
Method of analysis for aqueous fluids
Universal joint assembly
Systems and methods thereto for acceleration of web pages access using next page optimization, caching and pre-fetching techniques