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
Laboratory spatula
Method and apparatus for providing spin-home function for mobile communication terminal
Apparatus and method for evaluating an activity distribution, and irradiation system
Semiconductor element-embedded wiring substrate
Method and apparatus to select a profile of a digital communication line
Method of controlling semiconductor device, signal processing method, semiconductor device, and electronic apparatus
Image forming system, prognosis criterion setting apparatus, prognosis apparatus, image forming apparatus and non-transitory computer-readable recording medium
  Randomly Featured Patents
Text abbreviation methods and apparatus and systems using same
Method, medium, and system for adjusting a selectable element based on social networking usage
Titanium nitride/titanium silicide multiple layer barrier with preferential (111) crystallographic orientation on titanium nitride surface
Guitar-style synthesizer-controllers
Inflation device for an inflatable article of manufacture and adaptor therefor
Security arrangement for and method of rendering microprocessor-controlled electronic equipment inoperative after occurrence of disabling event
Corner bracket for mounting planar object
Image scanning system, and image scanner and computer readable medium therefor
Foam application by an apparatus for two-dimensional travel
Initiating element for non-primary explosive detonators