in fig2 in the expanded position the sleeve is bonded to the outer surface 2300 of the proximal end of the anchoring ring whose diameter is 0 8 u2033 or about the same as the diameter of the sleeve the anchoring ring 2204 includes at least four eyelets to anchor the device in place the outer most diameter of the ring is about one inch in an alternate embodiment there can be more than four eyelets fig2 is a perspective view of the anchoring ring 2204 shown in fig2 in a collapsed position for insertion and removal the circular ring 2204 shown in fig2 has been compressed to an oval shape allowing the anchoring ring to be inserted into the lumen of a catheter for delivery fig2 is a perspective view of an anchor 2500 for anchoring the collapsible ring shown in fig2 to the muscular tissue of the pyloric orifice the anchor 2500 includes an anchor pin 2504 coupled to a second pin 2506 by a flexible shaft 2502 the anchor pin 2504 includes a shaped barb 2508 for locking the anchor 2500 into the tissue the anchor 2500 is delivered after the collapsible ring has been positioned in the pyloric orifice the anchor is guided so that the anchor pin 2504.