Patent ID: 7210543
Filing Date: 2007-05-01
Classification: E21B,Y10T

Abstract:
1. A reversible-auger post hole digger apparatus driven by a power takeoff comprising: a housing; a main input shaft rotatably positioned within and across said housing; a pair of pinion gears carried by opposite ends of said main input shaft; a central portion of said shaft being provided with an external engageable component; a slide disposed on said shaft between said pinion gears and including an internal engaging component adapted for engaging either one of said pinion gears or said central portion of said shaft in order to obtain a selected forward, reverse or neutral position; a mechanism for moving said slide to one of said selected forward, reverse or neutral position; a pair of ring gears mounted at upper and lower positions and engaged with said pair of pinion gears; an output shaft driven by one ring gear of the pair of ring gears in both forward and reverse directions and extending from said housing, and an auger connected to said output shaft.