Patent ID: 9182059
Filing Date: 2015-11-10
Classification: F16L,Y10T

Abstract:
1. A service head adaptor assembly adapted to be fitted onto a service pipe, where the service pipe comprises a metallic host pipe that is lined with an interior lining pipe, said adaptor assembly including: a body that is adapted to form a seal with the host pipe; a bore extending along a longitudinal axis of said body; a compression element mountable on said body so as to be rotatably and axially displaceable relative to the body; a piston that is axially translatable relative to said body, wherein the piston has an electrically insulating coating covering at least a portion of a surface of the piston; an annular flange protruding radially inwards from said body into said bore, wherein the annular flange is inclined in a direction toward said longitudinal axis; a grip ring disposable between said piston and said flange, said grip ring having an inner radial surface adapted to bear against and grip an outer radial surface of the lining pipe during use; and a first slip spacer disposable between the compression element and the piston to allow a transmission of axial load from the compression element to the piston but to substantially prevent a transmission of torque therebetween; wherein the compression element is rotatably and axially moveable relative to said body to axially displace the piston relative to the body causing the grip ring to bear against the inclined annular flange and grip radially inwardly against the outer radial surface of the lining pipe during use.