Pipe compression ring

A multi-component compression ring for use in pipe jacking for transferring a jacking load between adjacent pipe sections;

• said ring being configured to be positioned directly between facing ends of the pipe sections and to transfer force between the pipe section;
• said ring having:
• a) a first component selected from the group consisting essentially of wood fiber materials, non-elastomeric cellular plastics and foams;
• and first component having a front section and a rear section;
• b) and a second component selected from the group consisting essentially of polyurethane, rubber, plasticized polyvinyl chloride, elastic silicones, nylon 11, nylon 12, ethylene acrylic, and ethylene vinyl acetate;
• said second component being positioned between said front and rear sections of said first component.

A compression ring for use in transferring loads between adjacent pipe during trenchless pipe installation;

• said ring comprising:
• a) a first non-elastic component joined with a second elastic component;
• and
• b) said first component includes two external sections with said second component sandwiched between said sections.

A compression ring for use in transferring loads between adjacent pipe during trenchless pipe installation;

• said ring comprising:
• a) a first non-elastic component joined with a second elastic component;
• and
• b) said first component is constructed from a wood fiber material and said second component is polyurethane.

A multi-component compression ring for use in pipe jacking for transferring a jacking load between adjacent pipe sections having:

• a) a first component selected from the group consisting essentially of wood fiber materials, non-elastomeric cellular plastics and foams;
• b) and a second component selected from the group consisting essentially of polyurethane, rubber, plasticized polyvinyl chloride, elastic silicones, nylon 11, nylon 12, ethylene acrylic, and ethylene vinyl acetate;
• said second component being positioned adjacent said first component;
• and
• c) said first component is constructed of plywood in two ring shaped sections and said second component is constructed of polyurethane having a generally circular cross section and being sandwiched between said plywood sections.