Abstract: A cervical canal dilator comprising an elongate tubular or cylindrical shaft having a distal end and a proximal end; the interior of the shaft being provided with internal cavities that communicate with anchor and dilation balloons in such a manner as to permit the separate inflation thereof; the anchor balloon being positioned on the distal end of the shaft and being capable of anchoring the dilator against the bottom of the cervix when inflated after the dilator is inserted in a cervix and the remaining dilation balloons being positioned between the distal and proximal ends so as to effect optimum dilation of the cervical canal when inflated after the device is inserted and anchored in place by inflation of the anchor balloon.

Abstract: An air intake control device is provided, including a housing, a plurality of bores, a passageway, and a support surface. The housing defines the bores, the passageway, and the support surface. A shaft is rotatably received within the passageway, and a plurality of plates are connected to the shaft. The bores accept fluid with a varying flow rate based on the rotation of the shaft and plates. A bushing is located between the support surface and the shaft and it prevents contact between the shaft and the housing. The bushing may selectively engage the shaft based on the flow rate through the bores. Additionally, the bushing may also have a slit and a variable diameter. The air intake control device may include a bearing assembly, which includes a rotating element which contacts the shaft, and a support element which positions the rotating element with respect to the shaft.