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
Integrating map-reduce into a distributed relational database
Fabric care compositions comprising front-end stability agents
Liposomes with improved drug retention for treatment of cancer
Method and apparatus for distributing promotional materials
Method for implementing dynamic pseudorandom keyboard remapping
Clock generator circuit for a charge pump
System and method for the analysis of biodiesel
  Randomly Featured Patents
Gold-nickel-vanadium-molybdenum brazing materials
Mobile terminal device including an elevating keyboard mechanism
Eye-gaze tracking device, eye-gaze tracking method, electro-oculography measuring device, wearable camera, head-mounted display, electronic eyeglasses, and ophthalmological diagnosis device
Continuous dehydration device and process
Manufacturing method of semiconductor device and substrate processing apparatus
Insulated water-tight connector assembly including a set screw driver and plug
Oxadiazole containing photoconductors
DRAM having a power supply voltage lowering circuit
Handle for an electric toothbrush
Microprocessor controlled single phase motor with external rotor having integral fan