VACUUM VALVE Russian patent published in 2000 - IPC

FIELD: agriculture. SUBSTANCE: vacuum valve is designed for fur-bearing animal trap and has flexible cylindrical enclosure 1 with side opening, striking mechanism and vacuum compressor. Striking mechanism has pinching device with at least two cable-and-pulley systems connected through movable arm 38. Vacuum compressor has piston 8, rod 10, spring 14 and rod initial free motion part coinciding with air channel 18 defined by surfaces of piston 8 and compressor casing. Air channel 18 connects hermetically sealed cavities of enclosure 1 and suction cavity of vacuum compressor. Trap has trigger member formed as flat spring 37 engageable with its one end to tooth 36 of retaining unit of carrier 30 of catch and with its pivotally connected and movable end to adjusting unit which is engageable through spring cover 11 with rod 10 of vacuum compressor. Upon starting of triggering member, hermetically sealed cavity for embracing animal's head is defined in enclosure 1, with following vacuumizing. Such construction provides intensified and humanized animal catching process. EFFECT: increased efficiency and simplified construction. 6 cl, 9 dwg