Resources Contact Us Home
Mine roof support and attachment means therefor

Image Number 3 for United States Patent #4605341.

Attachment means are provided for attaching a mine roof support to an abutment, (e.g. a flexible conveyor) the attachment means comprising a ram arrangement in the form of at least two rams 25, 26 operable to effect relative movement between the mine roof support and the abutment. The provision of two or more rams instead of the conventional single ram means that smaller bore rams may be used, for example a 60 mm bore as opposed to 41/4 inch bore and this makes it possible to cover or encase the rams in a protective shield without reducing the vertical space available to a miner underneath the mine roof support.

  Recently Added Patents
Integrated circuit package system with exposed interconnects
Manage a shared computing resource based on resource use reports
Chemical-selective device
Live streaming media and data communication hub
Mobile terminal with user identification card including personal finance-related information and method of using a value-added mobile service through said mobile terminal
Driving device and driving method for liquid crystal display
System and apparatus for controlled activation of acute use medical devices
  Randomly Featured Patents
Electronic still camera with monitor
Vehicle exhaust system with suspension arrangement
Door latching mechanism for roll-up doors
Kinetic energy transferring element applied to a button structure
Embedding watermark components during separate printing stages
Strain-relief housing for strand connectors of small electric motors
Enhanced photosynthesis and photocatalysis water treatment/biomass growth process
Voltage supplying device, and semiconductor device, electro-optical device and electronic instrument using the same
Method for collaborative discrimation between authentic and spurious signals in a wireless cognitive network