| 摘要 |
<p>An extruded conduit structure (10) is provided comprising a cluster of at least three tubes (12, 14, 16, 18) connected by webs (24, 34, 36, 38) extending between adjacent pairs, the tubes (12, 14, 16) and webs (24, 34, 36, 38) being formed by simultaneous extrusion of a suitable plastic through a suitable die. The outer surface (26) of each of the webs (24, 34, 36, 38) is convexly curved in an arc that is substantially tangential with the outer surfaces of the adjacent pair of tubes (12, 14, 16). The inner surface (28) of each of the webs (24, 34, 36, 38) is flat relative ot the outer surface (26) and forms a cord of such arc whereby each of the webs (24, 34, 36, 38) will be of minimum thickness (T1) along each of its junctures with the adjacent webs (24, 34, 36, 38). This construction substantially eliminates any concave surfaces on the exterior of the conduit (10) within which foreign matter may collect and the webs (24, 34, 36, 38) can be easily stripped along the tubes (12, 14, 16) to expose the tube ends for connection to the apparatus to which they are to be connected.</p> |
