Electrical conduit
AssigneePitcraft Limited
InventorGerald Richard Oldham Pentith
Life of this patent
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Abstract
An electrical power supply conduit comprises an elongate electrical conductor located in the conduit, the latter preferably being pressurized with clean air or an inert gas and having an entry slot extending longitudinally, through which slot, in use, an electrical pick up e.g. a pantograph of an electrical machine may enter the conduit to gain access to the electrical conductor, with a flexible mechanical seal extending longitudinally of the conduit and normally closing the slot.
Claims18
An apparatus for supplying electrical power in a potentially explosive atmosphere to a mining machine having an electrical pick-up means for receiving electrical power, comprising:
- an elongate conduit means;
- an elongate, electrical conductor located in said conduit means;
- said conduit means having a longitudinal slot formed therein to provide access to said conductor by the mining machine pick-up means;
- flexible sealing means extending longitudinally of said conduit means and normally enclosing said slot;
- and
- means for creating a substantially uniform, substantially constant internal pressure throughout said conduit means, said internal pressure being greater than the air pressure outside said conduit means to prevent ingress of air into said conduit means through said seal means.
Dependencies are inferred from the claim text.