RESCUER PROTECTIVE SUIT FOR WORKING AT LOW TEMPERATURES Russian patent published in 2015 - IPC F41H1/02 

FIELD: rescue facilities.

SUBSTANCE: invention relates to human personal protective equipment and is intended for rescue and salvage operations and repair works in extreme conditions, in particular the impact of the gaseous and liquid phases of aggressive chemically hazardous substances (ACHS) in the chemical industry enterprises, as well as under conditions of demounting obstructions where long-term work is required using vibration active tool such as perforator, air-hammer, and also at low temperatures. In the rescuer protective suit, consisting of trousers with protective stockings, a shirt with a hood, two-toed gloves and a balaclava, the trousers are sewn together with stockings ending with rubber saddle with the bots, which are sewn to ribbons for attaching to the feet, at that in the upper part of the trousers there are shoulder straps and half-rings, in the tissue lining the elastic frame racks are secured by the clips on the belt, and the protective shell is attached to the elastic frame racks, at that the protective shell is made three-layered against hazardous agents and substances with foam, where the liquid phase of the foam is a solution of clathrate didecyldimethylammonium halide with urea as the active compound in an amount of from 0.1 to 5% by weight, the obturator is made in the form of an annular inflatable chamber made of elastic material. And for hermetic sealing the ending of the conical surface of the filter with the obturator the respirator is provided with a frame of elastic material in the shape of a truncated cone with functional openings on the side surface, on one side of which, with a ring of elastic material a filter is attached, the rescuer footwear for operation at low temperatures is made of felt, comprising a bootleg, a foot part and a main sole placed on the lower side of the foot part, and the protective sole, which is located on the lower side of the main sole is made of EVA material or the compound of EVA with rubber, or the compound of EVA with PVC, or the compound of EVA with polyethylene, and additionally comprises a shoe insert which is formed with heating ethylene vinyl acetate or other elastic material, and in the heel part of the insert a piezo-element of piezo-rubber is glued, for example of polydimethylsiloxane with the thickness of 2.5÷5 mm, the size of 10x10 mm, while it is placed in a protective cover, and the heating filament is connected to at least one piezo-element located in the heel and/or toe area, the sole of the felt footwear is made two-layered: with an intermediate layer of polyurethane and a layer of elastic mesh elements having shock-absorbing properties and an outsole layer of thermoplastic polyurethane with wear-resistant properties, it creates favourable conditions to the operator when working with vibration active equipment, and the density of the mesh structure of elastic mesh elements is in the optimum range of values 1.2 g/cm³…2.0 g/cm³, and the material of the wire of elastic mesh elements is grade steel EI-708, at that its diameter is in the optimal range of values of 0.09 mm…0.15 mm.

EFFECT: increase in efficiency of rescuers work at low temperatures.

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