SNOW CRAB Russian patent published in 1995 - IPC

FIELD: road cleaning machinery. SUBSTANCE: snow crab has base chassis 1 with blade consisting of two sections 4 and 5 which can be turned in horizontal plane. Sections 4 and 5 are hinge-coupled by braces 22 and 23 with slider installed on longitudinal guide made in form of lead screw 6 connected with transmission of base chassis 1. Slider has two halves 9 and 10 divided along longitudinal axis and installed symmetrically relative to each other on screw 6 for movamant along screw thread. Halves are hinge-coupled with control levers 11 and 12 for travel in plane square to longitudinal axis of screw 6. Hinges of levers 11 and 12 are installed on sliders 15 and 16 which are mounted for travel on additional guides 17 and 18. When halves 9 and 10 come into meshing with thread of screw 6, either simultaneously or successively, at forward or reverse rotation of screw 6, sliders 15 and 16 move along guides 17 and 18, and turning of sections 4 and 5 of blade by means of braces 22 and 23 relative to hinge joint 3 in horizontal plane is provided. EFFECT: enlarged operating capabilities. 8 dwg