FOLDING HAND TROLLEY Russian patent published in 2000 - IPC

FIELD: transport engineering; trolleys for hand carriage of loads. SUBSTANCE: folding hand trolley has carrying frame 4 with bracket 7 hinged forward, U-shaped bracket 1 with folding handle 6, lower runners 2 and front support hinge-connected with wheel axle, all these members forming non-rigid three-dimensional body, being coupled by horizontal hinge joints. Lower runners are directed down-wards from wheel axle and along rising line to front support. U- shaped bracket rigidly coupled in bottom with wheels is directed tangentially to wheel rim and is provided with stops and locks in top and bottom of carrying frame for putting horizontal hinge joints out of operation and providing rigidity of body and with oval bodies with detachable closed crawler-type belts made two-layer, outer layer being made of flexible material, for instance, rubber and inner layer, from cross rounded-off hard pins made, for instance, of metal and secured to layer at a distance from each other. Locks for stops are made in form of freely fitted oval rings. Carrying frame has cover installed in the rear on horizontal hinge joints. EFFECT: provision of smooth travel when negotiating stairways and obstacles. 4 cl, 9 dwg