Accession Number : ADD004638

Title :   Pressure-Balanced Underwater Structural Release System.

Descriptive Note : Patent,


Personal Author(s) : Ess,John O

Report Date : 27 Dec 1977

Pagination or Media Count : 7

Abstract : A pressure-balanced separation nut for releasably engaging a threaded element. The separation nut includes nut segments which are housed within the cavity of a housing and are held in an assembled element-engaging condition by a slidable piston and a piston ring which surrounds the nut segments. A buffer piston bottoms within the slidable piston and has a conical face which slopes toward the axis and rests upon the inner ends of the nut segments. Fluid pressure is exerted on the inner face of the slidable piston to move it sufficiently in an axial direction to permit radial movement of the nut segments thereby quietly releasing the threaded element without the requirement of unthreading the threaded element. The conical face of the buffer piston forces the nut segments radially outward to aid in their separation from the threaded element. The device is provided with a fluid confining area relative to the slidable piston in combination with a pressure-balanced piston which is acted upon by the surrounding pressure to provide a pressure-balanced system which prevents undesired release of the threaded element. (Author)

Descriptors :   *Patents, Nuts(Fastenings), Separation, Underwater, Release mechanisms

Subject Categories : Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE