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US 12,138,721 B2Granted
Mining shield base lift methods
OwnerChristopher Scott Larewinventor
Life of this patent
Estimating the term…
Abstract
A longwall mining shield base lift method. The method includes removing an old wear pad and installing a new wear pad.
Claims19
A method of replacing a wear pad on a base lift, comprising:
- loosening at least one retaining bolt threaded into an axial wall extending from and forming a part of an old wear pad threaded onto a mining shield base lift cylinder rod until that retaining bolt does not impinge upon the cylinder rod;
- placing a bar in a spanner hole extending into the old wear pad and rotating the old wear pad to break loose the threading of the old wear pad from the cylinder rod;
- removing the old wear pad from the cylinder rod;
- placing a new wear pad onto the cylinder rod;
- and
- tightening a retaining bolt through the new wear pad until it engages the cylinder rod.
3 more elements
A method of replacing a wear pad on a base lift, comprising:
- unthreading an old wear pad from a mining shield base lift cylinder rod using a bar placed into a spanner hole extending into the old wear pad to break loose the threading;
- removing the old wear pad from the cylinder rod;
- removing a gland compressed between the wear pad and the cylinder rod;
- placing a new gland on the cylinder rod;
- and
- threading a new wear pad onto the cylinder rod.
3 more elements
A method of removing an old wear pad from a base lift cylinder and installing a new wear pad on the base lift cylinder, comprising:
- loosening at least one retaining bolt threaded into an old wear pad on a mining shield base lift until that retaining bolt does not impinge upon a cylinder rod;
- placing a bar in a spanner hole that extends into the old wear pad;
- rotating the wear pad using the bar until the old wear pad is loose on the cylinder rod;
- removing the old wear pad from the cylinder rod;
- placing a new wear pad onto the cylinder rod;
- and
- tightening a retaining bolt through the new wear pad until it engages the cylinder rod.
4 more elements
Dependencies are inferred from the claim text.