Pipe joint cocoon

Claim 2

Method of sealing a pipe joint, which comprises: applying to the joint the mating portions of a longitudinally divided cocoonlike shell of precast reinforced hardened plastic having conical ends faired own toward the pipe diameter; securing said portions in position surrounding the joint, and encasing said portions in a surrounding layer by coating said conical ends and side seams of said secured portions with a layer of hardenable plastic sealing material reinforced with fibrous material.

Claim 3

Method as claimed in claim 1, in which said portions are secured in position by adhesive tape.

Claim 4

Method as claimed in claim 1, in which said coating is by application of epoxy paste, and by covering the epoxy paste with glass tape.

Claim 5

Method as claimed in claim 3, in which the glass tape is painted with a liquid epoxy formulation.

Claim 6

Sealed pipe joint comprising mating portions of a longitudinally divided cocoonlike shell of precast reinforced hardened plastic having: conical ends faired down toward pipe diameter and secured in position surrounding said joint; and a casing surrounding said portions formed by said conical ends and side seams of said secured portions being coated with a layer of hardenable plastic sealing material reinforced with fibrous material.

Claim 7

Sealed pipe joint comprising mating portions of a longitudinally divided cocoonlike shell of precast reinforced hardened plastic having: conical ends faired down toward pipe diameter and secured in position surrounding said joint; and a casing surrounding said portions formed by said conical ends and side seams of said secured portions being coated with a layer of hardenable plastic sealing material reinforced with fibrous material.

Claim 8

Sealed pipe joint as claimed in claim 5 in which said precast reinforced hardened plastic shell is glass cloth saturated with epoxy resin.

Claim 9

Sealed pip joint as claimed in claim 5 in which said casing is epoxy resin reinforced with glass tape.

Claim 10

Method of sealing a joint of pipe ends in abutting relation, which comprises: applying to the joint a longitudinally divided cocoonlike mass of reinforced hardened plastic comprising mating shells having conical ends faired down toward the pipe diameter; by moving said shells toward each other with said abutting ends therebetween until said shells contact each other thereabout to surround the same; thereafter securing said mating shells together by coating said conical ends and side seams with a layer of hardenable sealing material; and by wrapping said coated conical ends and side seams with nonmetallic tape in several passes and crisscrossed back and forth.

Claim 11

Method of sealing a joint of pipe ends in abutting relation, which comprises: applying to the joint a longitudinally divided cocoonlike mass of reinforced hardened plastic comprising mating shells having conical ends faired down toward the pipe diameter; by moving said shells toward each other with said abutting ends therebetween until said shells contact each other thereabout to surround the same; thereafter securing said mating shells together by coating said conical ends and side seams with a layer of hardenable sealing material; and by wrapping said coated conical ends and side seams with nonmetallic tape in several passes and crisscrossed back and forth.

Claim 12

Sealed joint of pipe ends in abutting relation, comprising: mating shells of a longitudinally divided cocoonlike mass of precast reinforced hardened plastic having conical ends faired down toward the pipe diameter; said shells being brought together radially with said abutting ends therebetween to contact each other thereabout to surround the same; said mating shells being secured together by said conical ends and side seams having a coating of a layer of hardenable sealing material; and by said coated conical ends and side seams being wrapped with nonmetallic tape in several passes and crisscrossed back and forth.

Claim 13

Sealed joint of pipe ends in abutting relation, comprising: mating shells of a longitudinally divided cocoonlike mass of precast reinforced hardened plastic having conical ends faired down toward the pipe diameter; said shells being brought together radially with said abutting ends therebetween to contact each other thereabout to surround the same; said mating shells being secured together by said conical ends and side seams having a coating of a layer of hardenable sealing material; and by said coated conical ends and side seams being wrapped with nonmetallic tape in several passes and crisscrossed back and forth.