| 摘要 |
Disclosed is a door and closure assembly ideally adapted for use as an industrial air filter door with handle and dog actuation. The assembly comprises a door frame and a door having an outside surface and an inside surface. The door is hingedly attached to the frame at a side edge of the door. A plurality of closure means for securing the door to the frame are provided. The closure means comprises a handle located at the outside surface of the door; a dog located on the inside surface of the door; a rotatable shaft penetrating through said door and connecting said handle and said dog; door frame retention means cooperative with the dog for securing the door to the frame; and stop means disposed and cooperating with said retention means so that the handle and dog rotate in one direction only to secure the door and only in the opposite direction to unsecure the door. All of the handles are disposed in substantially the same position when the door is secure or unsecure.
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