ADJUSTABLE LOCK Russian patent published in 2001 - IPC

FIELD: radiation safety engineering; nuclear power engineering and other industries where radiation safety is essential. SUBSTANCE: adjustable lock is primarily used for closing process aperture of radiation safety chamber at nuclear power plants and also for other fields of science and technology to provide communication between locations isolated to meet safety requirements. Lock has housing, safety- material plug rotating about vertical axis and provided with cavity, and plug operating mechanism. Gates used for closing ends of aperture are mounted on horizontal guides secured within housing. Gates are free to move along guides and have pushers. The latter are directed inwardly with respect to aperture; they are made in the form of flexible spring sections with guide case. Plug has four flat edges with stops designed for engaging pushers. EFFECT: reduced space requirement for holding loads to be conveyed; facilitated functioning of process equipment. 3 dwg