GB1257475A - - Google Patents

Abstract

1,257,475. Snow clearing apparatus. J. HARTLIEB. 22 Nov., 1968 [22 Nov., 1967; 5 Feb., 1968], No. 55608/68. Heading E1G. In vehicle-mounted snow-clearing apparatus for roads, railways &c. some of the snow 43a, Fig. 7, in front of plough blade 40 is picked up by a rotor 49 and introduced into a pumped circulation system comprising a container 23 for salt or like solution and a heated melting and mixing chamber 44-8 having an overflow 47 to the ground underneath, whereby the remaining snow 67 in front of the plough 40 is flooded with a hot solution of salt and melted snow. The apparatus is bolted on the front of a vehicle and comprises one or more transverse or longitudinal boiler cylinders 14 heated by burners. The Specification discloses numerous diagrammatically illustrated modifications. Figs. 1, 2 and 4 (not shown) illustrate three different arrangements of longitudinal boilers (60, 60a), and different-height snow baffles (70) for directing snow into several melting chambers. In Fig. 7 the water in chamber 8 is heated in part by gases escaping from a corrugated heat exchanger 27 on a perforated transverse boiler cylinder 14. The salt container 23 incorporates a fine mesh screen 39 below which is an inlet 32 for pumped water. The chamber 44-8 has outlets leading to the pump and to various fixed sprays (e.g. for clearing under parked vehicles) and flexible hoses. The rotor 49, Fig. 8, comprises preferably two drums each composed of cutting discs 73 and angularly displaced paddle wheels 72 having semi-cylindrical pick-up vanes. The drum(s) cooperate with a deflector 121, an adjustable-height cutting blade 2, and a regulating flap 50, the assembly being retractably mounted on inclined guide rails 71. Snow passing forward of the flap 50 is laterally expelled through an angularly adjustable outlet 51-52, or may be ducted rearwardly for discharge into the vehicle itself or a trailer. The oblique plough 40, Fig. 5, may be vertically spring-loaded and may carry extensions 106 and spray nozzles 38. Additional retractable ploughs 55 may be provided in front of the rotor, together with fixed baffles 24, hot air blowers 37, and suction nozzles 110. The apparatus may also include hoses for spraying hot or cold air or water, and a hood for directing hot gases over a wide area, e.g. for melting runway ice.