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US 4,765,686 AGranted
Rotatable cutting bit for a mining machine
AssigneeGTE Valenite Corporation
InventorWayne F. Adams
Life of this patent
Estimating the term…
Abstract
In a rotatable cutting bit of the type for delivering water under pressure to the work area being cut, the head portion includes an annular recess including a plurality of outlet ports facing forwardly and protected from the rearward flow of material being cut.
Claims8
A rotatable cutting bit for the delivery of fluid under pressure to a work area being cut comprising,
- a head portion having a forwardly facing hard insert and a plurality of outlet ports for emitting a fluid,
- a shank portion depending from said head portion along a longitudinal axis and including a fluid passage, said outlet ports being connected to said passage for the flow of fluid,
- said head having an annular recess radially spaced from the longitudinal axis and extending entirely around the periphery of said head, said annular recess forming a forwardly facing surface and a rearwardly facing surface,
- said outlets being positioned along said forwardly facing surface for directing a stream of water in a forward direction at an acute angle with the longitudinal axis for enveloping said head with a spray of fluid,
- said rearwardly facing surface forming a lip for protecting said outlet ports from the rearward flow of work being cut.
2 more elements
Dependencies are inferred from the claim text.