Patent ID: 8424934
Filing Date: 2013-04-23
Classification: B66B,Y10T

Abstract:
1. An interlock for a lifting device, comprising: a rotating gear, a spring biased and pivoting pawl, an electrically operated actuator, wherein said electrically operated actuator is connected to said spring biased and pivoting pawl, wherein said rotating gear comprises a bottom portion comprising a plurality of teeth, and a top portion that overlays said bottom portion, said top portion of the rotating gear having the same number of teeth as the bottom portion of the rotating gear, and wherein the door keeper engages said teeth of said top portion of said rotating gear and said spring biased and pivoting pawl engages said teeth of said bottom portion of said rotating gear and prevents rotation of said rotating gear, and holds the door keeper within said teeth of said rotating gear, and upon actuation of said electrically operated actuator, said electrically operated actuator disengages said spring biased and pivoting pawl from said rotating gear, allowing said rotating gear to rotate and disengage said door keeper, and wherein the door keeper is capable of engaging said rotating gear when said spring biased and pivoting pawl is not engaged with said rotating gear, but the door keeper is not capable of disengaging from said rotating gear when said spring biased and pivoting pawl is engaged with said rotating gear, and wherein said spring biased and pivoting pawl engages said rotating gear by spring biasing.