B - Operations – Transporting – 60 – S
Patent
B - Operations, Transporting
60
S
141/6
B60S 3/00 (2006.01)
Patent
CA 1257177
A plant for de-icing surfaces. ABSTRACT A plant for de-icing especially surfaces of aero- planes, comprising the use of at least two sources (10,12) of liquid media that are different from each other and capable of being sprayed separately or as a mixture, comprising a number of positive liquid pumps (16,22) corresponding to the number of media, which pumps all have the same capacity or a prede- termined interrelated capacity ratio and terminate in a common spray pipe (24). The connection of the liquid pumps to the sources includes at least one multi-way valve (28) for connecting at least one of said sources to at least one of said liquid pumps. In a hydraulic system comprising hydraulic motors (56,52) for driving the liquid pumps (16,22) at least two of said motors are connected to a common hydraulic pressure pump (32) controlled by way of pressure compensation to work with at least two pressure stages subject to a ratio corresponding to that of the capacity of at least one liquid pump to the total capacity of both liquid pumps. In such a plant the composition of the spray liquid to be dispensed is determined solely by the capacity of the liquid pumps, thereby eliminating any throttling effects which may cause the de-icing medium to coa- gulate.
451193
Gowling Lafleur Henderson Llp
Vestergaard Godtfred
LandOfFree
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