Patent ID: 7051764

Claim:
A pipe arrangement for transmitting volume flows of a fluid, comprising: a port which is assigned to a pump, a port which is assigned to a consumer, a connecting pipe which connects the pump to the consumer, an outer pipe having an open end and a closed end, which outer pipe is connected to the fluid at its open end, and which outer pipe is at least partially composed of an elastic hose, and an inner hose of a relatively small diameter, which (i) is oriented coaxially with respect to the outer pipe, (ii) is disposed to extend in the elastic hose of the outer pipe, and (iii) has one free end which points in the direction of the open end of the outer pipe and points away from the closed end of the outer pipe, wherein an outer diameter of the inner hose at its free end is smaller than an inner diameter of the outer pipe to form a space between the outer diameter of the inner hose and the inner diameter of the outer pipe.