Internal backup ring system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 19, 2000
Grant Date -
N/A
app pub date -
Oct 29, 1998
filing date -
Oct 23, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An actuation system preferably for mounting between front and rear clamping mechanisms in a pipe clamping apparatus as part of an internal backup ring system. The system includes a guide, a cam plate positioned adjacent to the guide and rotatable relative thereto, a drive mechanism coupling the guide and the cam plate such that actuation of the drive mechanism causes the cam plate to rotate relative to the guide about an axis of rotation, and a power source for driving the drive mechanism. A backup ring assembly, having a plurality of backup shoe units, may be associated with the cam plate such that rotation of the cam plate relative to the guide plate causes the backup ring assembly to move radially relative to the axis of rotation of the cam plate in order to engage or disengage the inner wall of a pipe. The system may also include auxiliary means for dislodging the backup ring assembly when at least one of the backup shoe units is stuck to the inner wall of the pipe.
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