SCREW JACK Russian patent published in 1999 - IPC

FIELD: materials handling facilities; jack with extensible tail spindles. SUBSTANCE: jack has housing, screw pair arranged in housing and connected with drive, and sliding nut of screw pair fixed from turning in tail spindle socket. Tail spindle has hinged support whose side projection is connected by axle with bracket cantilever mounted on tail spindle outer side. End face steps are made on support and tail spindle, steps being displaced by end faces diametrically opposite to connection of indicated step with bracket. Tail spindle has key-stop passed through longitudinal slot of housing for engagement with upper and lower limit switches installed on housing. EFFECT: enlarged operating capabilities, enhanced operation reliability. 2 cl, 2 dwg