Pipe connection to manholes and the like

Claim 1

In a connection of a pipe through a generally round hole in the wall of a manhole or like structure, the improvement residing in a sealing structure and comprising a pair of outwardly opening tapered openings in the wall structure, one on each side of the wall where it is intersected by the hole, and a pair of resiliently compressible ring members, each ring member being arranged in wedged and resiliently compressed engagement between a portion of the wall structure that defines a said tapered opening and an adjacent longitudinally disposed portion of pipe that extends through the hole in said wall structure, said ring members and tapered openings defining means (a) clamping said pipe portion under longitudinally directed tension forces in said pipe between compressed said ring members and (b) clamping said wall structure under corresponding longitudinally directed compressive forces between compressed said ring members.

Claim 7

The method of assembling a pipe to a wall of a manhole, comprising the steps of providing a manhole wall structure having a generally circular hole through a wall thereof, which hole has a pair of tapered generally circular openings, one on each side of the wall; placing the pipe through the hole with a portion of the pipe protruding beyond the wall in both directions; providing a first resilient compressible ring member over one end of the pipe and applying a force along the pipe to urge the pipe in a ring-member-compressing direction relative to the wall and compressing the first resilient ring member between one of the tapered surfaces of the tapered openings and the pipe; then, while maintaining a ring-member-compressing force on the pipe that continues the compression of said first ring member, providing a second resilient compressible ring member into the other tapered opening about the pipe; and forcing the second ring member into compression between said other tapered opening and the pipe; followed by a relaxation of the said ring-member-compressing force applied to said first ring member through the pipe to leave the ring members exerting (a) clamping tension forces in the pipe between locations of ring member engagement with the wall of the manhole and (b) clamping said wall structure under corresponding longitudinally directed compressive forces between compressed said ring members.

Claim 8

The method of assembling a pipe to a wall of a manhole, comprising the steps of providing a manhole wall structure having a generally circular hole through a wall thereof, which hole has a pair of tapered generally circular openings, one on each side of the wall; placing the pipe through the hole with a portion of the pipe protruding beyond the wall in both directions; providing a first resilient compressible ring member over one end of the pipe and applying a force along the pipe to urge the pipe in a ring-member-compressing direction relative to the wall and compressing the first resilient ring member between one of the tapered surfaces of the tapered openings and the pipe; then, while maintaining a ring-member-compressing force on the pipe that continues the compression of said first ring member, providing a second resilient compressible ring member into the other tapered opening about the pipe; and forcing the second ring member into compression between said other tapered opening and the pipe; followed by a relaxation of the said ring-member-compressing force applied to said first ring member through the pipe to leave the ring members exerting (a) clamping tension forces in the pipe between locations of ring member engagement with the wall of the manhole and (b) clamping said wall structure under corresponding longitudinally directed compressive forces between compressed said ring members.