Corrugated plastic pipe with integrally formed coupler

Claim 2

An elongate corrugated resilient plastic drainage pipe having spaced-apart successive annular ribs with annular valley portions therebetween extending from adjacent one end portion of the pipe and throughout the remainder of the pipe, and coupling means integrally formed with said pipe and defining said one end portion thereof and adapted for releasable connection with the opposite end of another like pipe, said coupling means comprising an annular collar having an inner diameter greater than the outer diameter of said ribs and having an inwardly extending annular shoulder defining the inner end of the collar and serving as an abutment stop for a connecting pipe, said collar being of a length so as to receive therein at least one rib of a connecting pipe, a plurality of spaced latching members integrally formed with said collar and extending inwardly around the interior of said collar, the radial distance from the inner end of each latching member to the axis of the collar being less than the radius of said ribs, each of said latching members having at least a first pair of opposing uninterrupted walls integrally formed with said collar, one of said walls sloping inwardly away from the outer end of the collar and toward the axis of the collar and serving as a cam surface for facilitating interconnecting of pipes, and the opposing wall extending substantially normal to the axis of the collar and adapted to engage the side of a rib of an interconnected pipe for resisting the releasement thereof.

Claim 3

A corrugated resilient plastic drainage pipe in accordAnce with claim 1, wherein said plurality of latching members are circularly arranged around the interior of the collar to engage the same rib of a connected pipe.

Claim 4

A corrugated resilient plastic drainage pipe in accordance with claim 1, wherein said collar is of a length so as to receive therein a plurality of ribs of a connecting pipe, and wherein said plurality of latching members are arranged in opposing pairs, with the pairs being angularly disposed relative to each other about the axis of said collar, one of said pair of opposing latching members being positioned closer to the outer end of the collar than another opposing pair by a distance substantially equal to the width of one rib and one valley portion for permitting two adjacent ribs of a connected pipe to be engaged by the pairs of latching members.

Claim 5

A corrugated resilient plastic drainage pipe in accordance with claim 1 wherein each of said latching members has a second pair of opposing uninterrupted walls integrally formed with said collar and which connect opposite sides of said first pair of opposing walls for imparting additional rigidity thereto.

Claim 6

A corrugated resilient plastic drainage pipe in accordance with claim 1 wherein said latching members comprise four latching members substantially equally spaced apart from each other around the interior of said collar.

Claim 7

An elongate corrugated resilient plastic drainage pipe having spaced apart successive annular ribs with annular valley portions therebetween extending from adjacent one end portion of the pipe and throughout the remainder of the pipe, and coupling means integrally formed with said pipe and defining said one end portion thereof and adapted for releasable connection with the opposite end of another like pipe, said coupling means comprising an annular collar having an inner diameter greater than the outer diameter of said ribs and having an inwardly extending annular shoulder defining the inner end of the collar and serving as an abutment stop for a connecting pipe, said collar being of a length so as to receive therein a plurality of ribs of a connecting pipe, a circularly arranged series of spaced latching members integrally formed with said collar adjacent the outer end of the collar and extending inwardly from the inner surface of said collar, said series of latching members having their inner ends defining an imaginary circle of a diameter less than the outer diameter of said ribs, each of said latching members having at least a first pair of opposing uninterrupted walls integrally formed with said collar, one of said walls sloping inwardly away from the outer end of the collar and toward the axis of the collar and serving as a cam surface for facilitating interconnecting of pipes, and the opposing wall extending substantially normal to the axis of the collar and adapted to engage the side of a rib of an interconnected pipe for resisting the releasement thereof.

Claim 8

An elongate corrugated resilient plastic drainage pipe having spaced apart successive annular ribs with annular valley portions therebetween extending from adjacent one end portion of the pipe and throughout the remainder of the pipe, and coupling means integrally formed with said pipe and defining said one end portion thereof and adapted for releasable connection with the opposite end of another like pipe, said coupling means comprising an annular collar having an inner diameter greater than the outer diameter of said ribs and having an inwardly extending annular shoulder defining the inner end of the collar and serving as an abutment stop for a connecting pipe, said collar being of a length so as to receive therein a plurality of ribs of a connecting pipe, a circularly arranged series of spaced latching members integrally formed with said collar adjacent the outer end of the collar and extending inwardly from the inner surface of said collar, said series of latching members having their inner ends defining an imaginary circle of a diameter less than the outer diameter of said ribs, each of said latching members having at least a first pair of opposing uninterrupted walls integrally formed with said collar, one of said walls sloping inwardly away from the outer end of the collar and toward the axis of the collar and serving as a cam surface for facilitating interconnecting of pipes, and the opposing wall extending substantially normal to the axis of the collar and adapted to engage the side of a rib of an interconnected pipe for resisting the releasement thereof.

Claim 9

A corrugated resilient plastic drainage pipe in accordance with claim 6 wherein the distance from said annular shoulder to said series of latching members is at least as great as the collective width of two ribs and one valley portion.

Claim 10

An elongate corrugated resilient plastic drainage pipe having spaced apart successive annular ribs with annular valley portions therebetween extending from adjacent one end portion of the pipe and throughout the remainder of the pipe, and coupling means integrally formed with said pipe and defining said one end portion thereof and adapted for releasable connection with the opposite end of another like pipe, said coupling means comprising an annular collar having an inner diameter greater than the outer diameter of said ribs and being of a length so as to receive therein a plurality of ribs of a connecting pipe, and a circularly arranged series of spaced latching members integrally formed with said collar adjacent the outer end of the collar and extending inwardly from the inner surface of said collar, said series of latching members having their inner ends defining an imaginary circle of a diameter less than the outer diameter of said ribs.

Claim 11

An elongate corrugated resilient plastic drainage pipe having spaced apart successive annular ribs with annular valley portions therebetween extending from adjacent one end portion of the pipe and throughout the remainder of the pipe, and coupling means integrally formed with said pipe and defining said one end portion thereof and adapted for releasable connection with the opposite end of another like pipe, said coupling means comprising an annular collar having an inner diameter greater than the outer diameter of said ribs and being of a length so as to receive therein a plurality of ribs of a connecting pipe, and a circularly arranged series of spaced latching members integrally formed with said collar adjacent the outer end of the collar and extending inwardly from the inner surface of said collar, said series of latching members having their inner ends defining an imaginary circle of a diameter less than the outer diameter of said ribs.