McLanahan Log Washers Still an Industry Staple after More Than a Century
The Log Washer was invented in 1891 by Samuel Calvin McLanahan, the second generation of family ownership of McLanahan Corporation, to remove clay from gravel, various types of ores and crushed stone to improve the quality of the material.
Samuel Calvin’s design featured paddles bolted to squared-off tree logs, which is how the Log Washer got its name. The paddles on the counter rotating log shafts agitated the material to facilitate particle-on-particle scrubbing as well as moved the cleaned material toward the discharge end. Liberated clay was removed with the wash water from near the feed end of the machine.
“It was quite an invention, and we still manufacture it,” said Michael McLanahan, Chairman of McLanahan Corporation’s Board of Directors and Samuel Calvin’s great-grandson.