Door assembly for a manure holding tank

A door assembly for a manure holding tank, the door assembly comprising:

• a door;
• at least one latch subassembly for locking the door when the door is closed, the at least one latch subassembly mountable on the manure holding tank;
• and,
• a door operating mechanism mountable on the holding tank and connected to the door for opening and closing the door, the door operating mechanism comprising a pivotably moveable portion to open and close the door, the door operating mechanism comprising a linearly translatable portion that cooperates with the at least one latch subassembly to lock and unlock the door;
• wherein the door operating mechanism comprises:
• at least one elongated support member;
• at least one slide guide pivotally mountable to the manure holding tank and fixedly connected to the door, the at least one elongated support member slidingly retained on the at least one slide guide, the at least one elongated support member able to translate linearly on the at least one slide guide relative to the at least one slide guide;
• and,
• at least one actuator mountable to the manure holding tank and operably mounted to the at least one elongated support member whereby actuation of the at least one actuator causes the at least one elongated support member to linearly translate on the at least one slide guide to engage and disengage with the latch subassembly to lock and unlock the door and causes the at least one elongated support member to pivot when the door is unlocked thereby causing the at least one slide guide to pivot about a pivot axis to open and close the door.