Chris Michael Georgoulias,Marquez Giovonnie Perkins,Bradley P. Aldridge
申请号：
US13435534
公开号：
US08800677B2
申请日:
2012.03.30
申请国别(地区):
US
年份:
2014
代理人:
摘要：
An aerator hole spacing control with lockout prevents operation of a coring head except if the speed control is at a limited range of preset coring speed positions between the minimum and the maximum. Electrical signals corresponding to a coring speed may be provided to a controller that allows the coring head to be lowered to an operating position only if the signals are within the limited range of preset coring speed positions.
