A replacement valve assembly (40), comprising:
- (a) a valve body (22) having a right side (221) and a left side (222) the valve body (22) comprising a right side cylinder (223), a left side cylinder (225), and a central chamber (227) between the right side cylinder (223) and the left side cylinder (225), wherein the central chamber (227), the right side cylinder (223), and the left side cylinder (225) are disposed along a longitudinal axis and are in fluid communication so as to form a fluid passage (228) between a right side cylindrical opening (224) of the right side cylinder (223) and a left side cylindrical opening (226) of the left side cylinder (225);
- (b) a pair of cut-covering assemblies comprising a right side cut-covering assembly (621) in an interior (2231) of the right side cylinder (223) and a left side cut-covering assembly (622) in an interior (2251) of the left side cylinder (225), wherein each cut-covering assembly comprises a sealing tube (25) having an elastomeric seal (26) disposed on an exterior portion of the sealing tube;
- (c) a rotatable valve (24) having a right side (241), a left side (242), and an annular outer periphery (243), the rotatable valve further comprising a first lateral side lever (431) extending outwardly from a first lateral side of the rotatable valve, and a second lateral side lever (432) extending outwardly from a second lateral side of the rotatable valve, each of the first lateral side lever (431) and the second lateral side lever (432) having a right side end (433) and a left side end (434);
- and
- (d) linkage rods (400) connecting the rotatable valve (24) to the sealing tubes (25), each linkage rod having a proximal end (403) and a distal end (404),
- wherein:
- (i) the proximal end (403) of a first right side linkage rod (401) is rotatably connected to the right side end (433) of the first lateral side lever (431) of the rotatable valve and the distal end (404) of the first right side linkage rod (401) is rotatably connected to a first lateral side (256) of the sealing tube of right side cut-covering assembly (621);
- (ii) the proximal end (403) of a second right side linkage rod (401) is rotatably connected to the right side end (433) of the second lateral side lever (432) of the rotatable valve and the distal end (404) of the second right side linkage rod (401) is rotatably connected to a second lateral side (257) of the sealing tube of right side cut-covering assembly (621);
- (iii) the proximal end (403) of a first left side linkage rod (402) is rotatably connected to the left side end (434) of the first lateral side lever (431) of the rotatable valve and the distal end (404) of the first left side linkage rod (402) is rotatably connected to a first lateral side (256) of the sealing tube of the left side cut-covering assembly (622);
- (iv) the proximal end (403) of a second left side linkage rod (402) is rotatably connected to the left side end (434) of the second lateral side lever (432) of the rotatable valve and the distal end (404) of the second left side linkage rod (402) is rotatably connected to a second lateral side (257) of the sealing tube of the left side cut-covering assembly (622);
- wherein when the rotatable valve (24) is rotated between a first position and a second position, the right side linkage rods (401) urge the right side sealing tube (251) outwardly so that a right side end of the right side cut-covering assembly (621) moves out of the right side cylindrical opening (224), and the left side linkage rods (402) urge the left side sealing tube (252) outwardly so that a left side end of the left side cut-covering assembly (622) moves out of the left side cylindrical opening (225).