Patent ID: 9394731
Filing Date: 2016-07-19
CPC Classification: E05B,E05C,Y10T

Claim Text:
1. A door lock system for hydro excavation equipment, the door lock system comprising: a debris tank having an open end; a door positioned over the open end; a threaded bolt having a first end projecting from a center portion of the door into the debris tank; a rotary actuator positioned on an exterior portion of the door coupled to a head of the threaded bolt and configured to rotate the threaded bolt; a cross member substantially centered and spanning an inside of the debris tank; a nut secured to the cross member, wherein the threaded bolt and nut are positioned to engage the door to pull and secure the door over the open end of the debris tank by rotating the threaded bolt into the nut using the rotary actuator; a hinge assembly mounted to an exterior of the debris tank and coupled to the door and configured for swinging movement of the door between a first position in which the door is over the open end, and a second position in which the door is spaced from the open end; and a guide linkage mounted inside the debris tank and comprising a first arm having a first end coupled to the cross member, and a second arm having a first end coupled to a second end of the first arm and a second end coupled to the door, wherein the first end of the first arm is secured proximate to the nut and the second end of the second arm is secured on the center portion of the door proximate to the threaded bolt.