Patent ID: 8613291
Filing Date: 2013-12-24
Classification: F16L,Y10T

Abstract:
1. An apparatus for controlling flow of fluid through a pipe, comprising: a housing configured to enclose a portion of a pipe through which fluid flow is to be controlled, the housing comprising: a flow control device movable from a stowed position in the stowage space to an installed position in the chamber for selectively controlling flow through the housing, the flow control device comprising a body having a leading end defining a cutting surface configured to rotate relative to the housing as the flow control device moves from the stowed position to the installed position for removing a section of the pipe enclosed by the housing as the flow control device moves from the stowed position to the installed position in order to form an opening in the pipe for receiving the flow control device when in the installed position, the cutting surface comprising a peripheral wall defining a central recess and the leading end further comprising a compression surface located within the recess defined by the peripheral wall of the cutting surface, the compression surface being configured to compress an upper part of the section of pipe whilst a lower part of the section of pipe is being cut by the cutting surface; and a rotary drive mechanism for moving the flow control device from the stowed position to the installed position in response to a rotary input; wherein the compression surface comprises a protuberant member extending from a central part of the body.