| 摘要 |
PURPOSE:To enable draining of air which gets into a high pressure chamber quickly out of high pressure chamber by providing a through-hole in a cylinder body, and by inserting a cylindrical body having a cup-like shape into the cylinder body with a very small clearance. CONSTITUTION:A hollow plunger 2 is slidably inserted into a cylinder body 1, and a high pressure chamber 7 is formed between the closed end of the body 1. The plunger 2 is provided with check valves 3-5 on its end near to the closed end of the cylinder body 1, and the open and end of the body 1 is plugged to form a reservoir chamber 8 in its interior. A through-hole to the outside is drilled in the upper part of the high pressure chamber 7 of said body 1. A cup- like cylindrical body 16 one end of which is closed is inserted over the outer circumference of said body 1 with a very small clearance to adjust the rate of leak from the high pressure chamber 7. By such an arrangement, air which has gotten into the high pressure chamber 7 through the check valves 3-5 is quickly drained to the outside out of the high pressure chamber 7. |
