| 摘要 |
An adjustable, quick acting balanced beam latching apparatus for a fluid tight door, hatch or scuttle mounted in an aperture in a bulkhead, wall or deck onboard ships, aircraft and other liquid or gas tight structures. A box frame is secured in an aperture in the bulkhead, and a fluid tight door is pivotally secured to one side of the box frame by suitable door hinges. A plurality of rotating dogs are pivotally secured to retract within the box frame in the retracted position, and to extend through apertures in the box frame when in the extended position. A plurality of balanced beam linkage members are rotatably secured to the rotating dogs. A plurality of connecting rods are rotatably secured to the balanced beam linkage members, and to each other. An operating link is pivotally secured at one end to a central connecting rod, and pivotally secured at the opposite end to an operating crank arm which is secured through an aperture in the door frame. Inside and outside operating handles are secured to the crank arm, to form a quick acting latching apparatus. An annular gasket is secured to the inside of the fluid tight door, and an annular door stop has a gasket engaging edge position to form a fluid tight seal when the door is closed and one of the handles are positioned to seal the fluid tight door. Adjustable dog spindles serve to manually adjust the position of the rotating dogs, in relation to the engaged door wedges, from either side of the fluid tight door. |
