22 moves down the restriction orifice 24 is secured to body 10 such that downward movement of the sleeve 20 reduces the volume of annular passage 22 by squeezing fluid through restriction orifice 24 at a regulated rate appropriate seals between the sleeve 20 and the restriction orifice 24 allows for pressure buildup against restriction orifice 24 by reason of downward movement of sleeve 20 fluid displace through restriction orifice 24 exits body 10 through opening 28 retainer 30 is secured at thread 32 to sleeve 20 segmented support dogs 34 are doweled to retainer 30 using dowels or roll pins 36 a ball seat 38 is supported by sleeve 20 using retainer 30 the preferred material for ball seat 38 is 6061 t6 aluminum dogs 34 in the run in position of fig1 are also supported by the inner wall 40 of recessed segment 18 a groove 42 is disposed at the lower end of wall 40 to allow the dogs 34 to become unsupported when moved to the position shown in fig2 fig3 shows the dogs 34 fully supported by wall 40 during run in fig4 shows the dogs 34 separated after becoming aligned with groove 42 fig5 illustrates the ball seat 38 which is disposed at the lower end of sleeve 20.