Mining machine having an extendable and retractable rotor arm and method of repairing an extendable and retractable rotor arm assembly
AssigneeEimco LLC
InventorMaurice K. LeBegue
Life of this patent
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Abstract
An extendable rotor arm for a mining machine includes a rotor arm having an end portion, a sleeve removably secured on at least part of the end portion, a rotor arm extension having an internal opening in which the sleeve and the end portion of the rotor arm are axially slidably received and nonrotatable, and a seal between an internal surface of the internal opening of the rotor arm extension and the sleeve. Methods of repairing an extendable rotor arm for a mining machine are also disclosed.
Claims27
An extendable rotor arm for a mining machine, comprising:
- a rotor arm having an end portion including a distal end portion;
- a sleeve removably secured on part of the end portion remote from the distal end portion;
- a rotor arm extension having an internal opening in which the sleeve and the end portion of the rotor arm are axially slidably received and nonrotatable, the rotor arm extension having cutting tools;
- and
- a seal disposed in a space between an internal surface of the internal opening of the rotor arm extension and the sleeve.
A mining machine having extendable rotor arms, comprising:
- a body;
- two or more drive shafts extending from a forward end of the body;
- one or more drives for rotating the drive shafts;
- and
- a plurality of extendable rotor arms mounted on each of the drive shafts, each rotor arm having
- an end portion including a distal end portion,
- a sleeve removably secured on at least part of the end portion remote from the distal end portion,
- a rotor arm extension having an internal opening in which the sleeve and the end portion of the rotor arm are axially slidably received and nonrotatable, and
- a seal disposed in a space between an internal surface of the internal opening. of the rotor arm extension and the sleeve.
A method of repairing an extendable rotor arm for a mining machine, comprising the steps of:
- removing a rotor arm extension of a rotor arm of a mining machine, the rotor arm having an internal opening, from an operating position on a rotor arm in which an end portion of the rotor arm and at least part of a sleeve on the end portion of the rotor arm, the sleeve being disposed on the end portion of the rotor arm at a point remote from a distal end portion of the rotor arm, are disposed inside of the internal opening of the rotor arm extension, the sleeve being separated from an internal surface of the internal opening of the rotor arm extension by a space;
- replacing the sleeve on the end portion of the rotor arm with a new sleeve;
- replacing the rotor arm extension in the operating position on the rotor arm.
Dependencies are inferred from the claim text.