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(11) | EP 2 617 469 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Simple fire truck with easy movement |
(57) Provided is a simple fire truck that easily moves to a narrow fire occurred spot
difficult for a car to enter by using a transfer wheel driven by a motor separately
from a pump driven by an engine, the simple fire truck including: a depressurization
groove that is formed between a chamber where a sealing unit receiving pressure of
the pump is provided, and a suction hole, so as to depressurize a pressure of the
chamber; a lubricating water supply unit for improving durability through lubrication
and cooling by supplying lubricating water to an inlet of the chamber according to
a vacuum pressure generated during an initial activation of the pump; and a rotor
unit having a first protrusion at an end of a side of a rotor provided inside the
chamber, and a second protrusion at a periphery of a shaft hole through which a rotation
shaft penetrates. Accordingly, the simple fire truck easily moves to the narrow fire
occurred spot difficult for a car to enter by using the transfer wheel driven by the
motor separately from the pump driven by the engine, prevents a damage of the sealing
unit by depressurizing a pressure transferred to the sealing unit by forming a groove
between the chamber and a suction unit formed inside the pump, and improves durability
of a positive-displacement pump through lubrication and cooling by using a lubricating
water suction unit provided at a pump suction unit during an initial activation.
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