Partial-seepage drainage pipe with mating sleeve

Claim 2

A partial-seepage drainage pipe comprising a plurality of similarly shaped pipe segments, each pipe segment including a corrugated, circular profile wall surface extending over the majority of the circumference of said segment, and a base having a bottom surface and side wall portions, each pipe segment further including a mating sleeve molded thereon at one end for receiving the free end of another pipe segment, each pipe segment having slit-like water seepage openings disposed in the corrugated wall surface, said pipe segments each comprising: the bottom surface being slightly convexly arched, and the thickness of the bottom surface being three to five times the thickness of said circular profile wall surface.

Claim 3

A drainage pipe as defined by claim 1, wherein said bottom surface of each pipe segment and said circular profile wall surface each have a radius of curvature, the radius of curvature of said bottom surface being approximately three to five times as large as the radius of curvature of said circular profile wall surface.

Claim 4

A drainage pipe as defined by claim 2, wherein said mating sleeve of each segment has an inner diameter greater than the outer diameter of the corrugated wall surface and includes a section extending to the corrugated wall surface which tapers slightly in conical fashion from said sleeve diameter to a diameter slightly smaller than the outer diameter of said corrugated wall surface.

Claim 5

A drainage pipe as defined by claim 3, wherein said mating sleeve includes a free end having a conical widened introduction section defining means for receiving said another pipe segment.

Claim 6

A drainage pipe as defined by claim 2, wherein said mating sleeve includes a free end having a conical widened introduction section defining means for receiving said another pipe segment.

Claim 7

A drainage pipe as defined in claim 1, wherein said mating sleeve of each segment has an inner diameter greater than the outer diameter of the corrugated wall surface and includes a section extending to the corrugated wall surface which tapers slightly in conical fashion from said sleeve diameter to a diameter slightly smaller than the outer diameter of said corrugated wall surface.

Claim 8

A drainage pipe as defined by claim 3, wherein said mating sleeve includes a free end having a conical widened introduction section defining means for receiving said another pipe segment.

Claim 9

A drainage pipe as defined by claim 1, wherein said mating sleeve includes a free end having a conical widened introduction section defining means for receiving said another pipe segment.

Claim 10

A drainage pipe as defined by claim 1, wherein said water seepage openings each extend over an angle α of said circumference of only 6° to 12°.

Claim 11

A drainage pipe as defined by claim 9, wherein said water seepage openings each extend over an angle α of said circumference of only 7° to 10°.

Claim 12

A drainage pipe as defined by claim 10, wherein a rib is disposed between each two adjacent seepage openings and extends in the circumferential direction, each said rib extending over an angle β of said circumference of 5° to 10°.

Claim 13

A drainage pipe as defined by claim 9, wherein a rib is disposed between each two adjacent seepage openings and extends in the circumferential direction, each said rib extending over an angle β of said circumference of 5° to 10°.

Claim 14

A drainage pipe as defined by claim 1, wherein a corrugation rib is disposed between each two adjacent seepage openings and extends in the circumferential direction, each said rib extending over an angle β of said circumference of 5° to 10°.

Claim 15

A pipe segment adapted for mating engagement with at least another correspondingly-shaped pipe segment to form a drainage pipe, said pipe segment comprising: (a) a tubular element having a first end, a second end, and a wall having a corrugated area extending between the first and second ends, and (b) a mating sleeve molded on one of the first or second ends of the tubular element for receiving one of the second or first ends, respectively, of said another pipe segment, said tubular element wall including a cross-sectional profile having first and second portions, (1) the first portion comprising a circular segment extending over the majority of the circumference of the tubular element, and (2) the second portion comprising a base segment and side wall segments, the side wall segments each having one end connected to the base segment and an opposite end extending away from one another and merging tangentially with a respective end of the circular segment of said first portion; the bottom surface of each of said pipe segments being slightly convexly arched, and the thickness of the bottom surfaces being three to five times the thickness of said circular segment.

Claim 16

A pipe segment adapted for mating engagement with at least another correspondingly-shaped pipe segment to form a drainage pipe, said pipe segment comprising: (a) a tubular element having a first end, a second end, and a wall having a corrugated area extending between the first and second ends, and (b) a mating sleeve molded on one of the first or second ends of the tubular element for receiving one of the second or first ends, respectively, of said another pipe segment, said tubular element wall including a cross-sectional profile having first and second portions, (1) the first portion comprising a circular segment extending over the majority of the circumference of the tubular element, and (2) the second portion comprising a base segment and side wall segments, the side wall segments each having one end connected to the base segment and an opposite end extending away from one another and merging tangentially with a respective end of the circular segment of said first portion; the bottom surface of each of said pipe segments being slightly convexly arched, and the thickness of the bottom surfaces being three to five times the thickness of said circular segment.