in fig2 b is a different method in which ejection pressure is imparted to lubricating fluid stored within a cylinder 46 by placing a plummet 48 onto a plunger 47 fitted into the cylinder 46 an advantage to the fig2 b method is that pressure may be imparted to the lubricating fluid without exposing it to air however because the lubricating fluid once having been fed into the fluid tank 4 can no longer be degassed the fluid must be adjusted ahead of time to adequately reduce the concentration of gas dissolved in the fluid which of these two methods to choose is best decided by the technician taking other factors into consideration as will be detailed later in the lubricating fluid infusion apparatus 1 with the interior of the fluid tank 4 in a reduced pressure state in order to degas the lubricating fluid the capillary tube 32 tip is in a situation in which it is exposed to atmospheric pressure under those circumstances external air tries to enter in heading toward the fluid tank 4 conversely when the infusion apparatus 1 dispenses lubricating fluid on the one hand the tip of the capillary tube 32 is under reduced pressure on the other the empty space 45 is put at atmospheric pressure imparting dispensing pressure to the lubricating fluid under these circumstances the lubricating fluid tries to flow out heading toward the exterior in either case the flow has to be stopped with the valve mechanism consequently what is sought in a valve mechanism for the dispenser.