Accession Number : ADD015613

Title :   Hatch Securing Mechanism.

Descriptive Note : Patent Application, Filed 25 Sep 92,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Culling, Robert K

Report Date : 25 Sep 1992

Pagination or Media Count : 25

Abstract : The invention is a hatch securing mechanism having a base attached to a hatchway and a hasp attached to a hatch lid. The base has an apertured retainer and a pinway element, the hasp being held between the retainer and pinway element during closure of the lid. A latch pin translatable in the pinway element has an angled tip which slides against a bevelled surface of the hasp to force the hasp into tighter, locked engagement with the base. The latch pin has a helical groove segment about the pin's axis, and a stud fixed to the pinway element engages the groove segment. The interaction of the stud and groove segment effects translation of the latch pin when the pin is manually rotated. The action of the latch pin also compresses an elastically deformable seal between the door and door frame so that the seal is increasingly effective against explosive blast pressures. The invention includes a lock mechanism for keeping the latch pin in a hasp retaining position unless the pin is manually moved.

Descriptors :   *HATCHES, *LATCHES, *PATENT APPLICATIONS, *PRESSURE SEALS, BLAST, CLOSURES, DOORS, EXPLOSIVES, FRAMES, INTERACTIONS, INVENTIONS, PINS, PRESSURE, SURFACES, MILITARY EQUIPMENT

Subject Categories : Surface Transportation and Equipment
      Chemical, Biological and Radiological Warfare
      Escape, Rescue and Survival
      Protective Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE