초록 ▼

This device comprises a cylindrical member integrally made of an elastic material for covering the inside periphery of a pipe joint, belt members impregnated with a bonding agent to be squeezed out by pressure, and circular expanding members for expanding said cylindrical member when positioned insi

This device comprises a cylindrical member integrally made of an elastic material for covering the inside periphery of a pipe joint, belt members impregnated with a bonding agent to be squeezed out by pressure, and circular expanding members for expanding said cylindrical member when positioned inside the cylindrical member and subsequently expanded. The respective belt members are wound around the outside peripheral surface of the cylindrical member at its longitudinal ends and the respective expanding members are brought into contact with the inside peripheral surface of the cylindrical member at both its longitudinal ends, so that by radially expanding the cylindrical member at both its longitudinal ends by the respective expanding members, the respective belt members are pressed against the inside peripheral portions of the pipes on both sides of the joint for squeezing out the bonding agent from the belt members by such pressure and thereby attaining an airtight and watertight bonding between the outside peripheral surface of the cylindrical member at both its longitudinal ends and the inside peripheral surfaces of the pipes.

대표청구항 ▼

A device for forming an airtight and watertight seal between the joint of two pipes, said device comprising: an integral cylindrical member made of an elastic material and having a longitudinal intermediate portion, said cylindrical member being inside of and in contact with the inner peripheral sur

A device for forming an airtight and watertight seal between the joint of two pipes, said device comprising: an integral cylindrical member made of an elastic material and having a longitudinal intermediate portion, said cylindrical member being inside of and in contact with the inner peripheral surfaces of the respective ends of two pipes that form a joint between the two pipes, said intermediate portion being radially adjacent to the joint of the two pipes; two belt members, each respectively positioned around the radial outer peripheral surface of a longitudinal end of said cylindrical member and impregnated with a bonding agent for, when pressure is exerted thereon, oozing the bonding agent therefrom; and two expanding members, each respectively positioned inside the inner peripheral surface of a longitudinal end of said cylindrical member for radially expanding the respective cylindrical member longitudinal end for exerting pressure on one of said belt members for causing the bonding agent thereof to be oozed therefrom, whereby the radial outer peripheral surfaces of the longitudinal ends of said cylindrical member are respectively bonded to the inner peripheral surfaces of the two pipe ends, thereby forming an airtight and watertight seal between the joint of the two pipes.