Underground drainage pipe
OwnerRobert Sinbad Auriemmainventor
Life of this patent
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Abstract
An underground drainage pipe having a trough, a roof and wings extending outwardly and downwardly from the junction between the trough lips and the roof. Specialized water intake holes are formed through the thickness of the trough lips beneath the wings. The drain pipe may be formed from extruded uniform cross section stock having alignment means for orienting bits used to drill the drainage holes.
Claims10
An underground drainage pipe formed of an extruded stiffly flexible plastic material having a rounded water carrying trough with normally diverging column lips at the edges of the trough;
- a roof overlying the trough and including a central high point forming a ridge extending along the pipe and wings on the edges of the roof integrally joining, overlying and extending downwardly beyond the column lips of the trough;
- the circumferential length of the roof being shorter than a circumferential length of the trough, the upper surfaces of the wings being essentially planar, the column lips extending away from the wings at angles essentially 90.degree. to the upper surfaces of the wings so that upon stress loading of the pipe the height of the pipe is reduced, the trough and roof buckle and the wing surfaces are rotated normal to the loading force to rotate the column lips parallel to the force and into column loading positions.
An underground drainage pipe formed of an extruded stiffly flexible plastic material having a rounded water carrying trough with normally diverging column lips at the edges thereof and an integral roof overlying the trough and joining the column lips, a central high point of the roof located above the lips and forming a ridge extending along the pipe, the circumferential length of the roof being shorter than that of the trough, the upper surfaces of the roof above the lips being planar and perpendicular to the axes of the diverging column lips so that the column lips extend away from such surfaces at angles of essentially 90.degree. whereby upon stress loading of the pipe the height of the pipe is reduced, the trough and roof buckle and the said wing surfaces are rotated normal to the loading force to rotate the cloumn lips into column loading positions parallel to the loading force.
Dependencies are inferred from the claim text.