Sandvik Intellectual Property Ab

Driltech Mission, LLC

Karl Ingmarsson

Grant Andrew Field

Simo Tanner

Air compressor systems, upgrade kits, computer readable medium, and methods for controlling an air compressor for improved performance. The methods may include receiving a working air requirement; determining an estimated air pressure of the air compressor to deliver the working air requirement; measuring a pressure of the air compressor; comparing the measured pressure with the calculated estimated air pressure; if the measured pressure of the air compressor is greater than the determined estimated air pressure by a predetermined greater amount, then decreasing an output control of the air compressor; and if the measured pressure of the air compressor is less than the calculated estimated air pressure by a predetermined lesser amount then increasing the output control of the air compressor. The air compressor may be controlled based on a measured pressure of delivered working air. An oil control system may shut off oil to parts of the air compressor.

Air compressor system and method of operation

A percussive rock drill bit includes a steel bit body and carbide button inserts mounted in a front cutting face thereof. The bit body includes a passage intersecting the front cutting face for conducting a flushing/cooling medium to the front cutting face. The flushing/cooling medium travels to an outer periphery of the bit body and travels upwardly within flushing grooves formed in the outer periphery of the bit body. Portions of the bit body situated between successive ones of the flushing grooves constitute wings of the bit body. Some of the button inserts constitute gauge inserts. Only a gauge insert is mounted in each wing. At least some, possibly all, of the gauge inserts are offset circumferentially from a center of the respective wing toward a trailing end of the wing.

Growing community of inventors

Gainesville, FL, United States of America

Karl Ingmarsson