Dresser Europe, S.a.

Harry James Fruin

Paul Greenhough

A mining machine haulage transmission includes an overload protection arrangement comprising a torque sensing device which monitors the torque transmitted and brings about decoupling of one or more clutches to disconnect the transmission output from its input, in the event that the transmitted torque exceeds a predetermined threshold. In one preferred arrangement, the torque sensing device produces electrical output signals dependent upon the transmitted torque to control operation of the clutch or clutches. In an alternative arrangement or in addition, a source of motive power is connectible to operate the clutch or clutches and control means are provided, responsive to the torque sensing device, to control connection of the power source to the clutch or clutches so as to bring about decoupling in the event of a torque overload.

Mining machine haulage transmission

A mining machine adapted to traverse a mine face comprises a rotary drum, which may be mounted transversely or forwardly of the machine body, carrying liquid orifices which are supplied with water under pressure so that each orifice produces a water jet of continuously varying pressure which is directed at the material being mined at least for some of the times when the jet pressure is at its maximum value. In operation, reciprocation between a number of pistons and respective bores, the bores being formed in the drum, is brought about as the drum rotates by an eccentric bearing with which the pistons coact. The drum may carry cutting picks to assist the water jet cutting.

Growing community of inventors

Staincross, United Kingdom

Harry James Fruin