Patent ID: 8764066

Claim:
An expansion coupling system comprising: a first component having a major section and a coaxial minor section, the major section of the first component having an open forward end, a forward annular projection extending radially inwardly from the major section of the first component adjacent to the open forward end; and a second component having a major section and a coaxial minor section, the second component formed with axial projections intermediate the major and minor sections, the major section of the second component having an open rearward end, a rearward annular projection extending radially outwardly from the major section of the second component adjacent to the open rearward end, axially spaced annular recesses in the rearward annular projection with an O-ring in each annular recess, the O-rings being slidably received and in sliding contact with the major section of the first component, the major section adjacent to the forward end formed with radially interior axial slots adapted to receive the axial projections when the first and second components are in a contracted orientation.