| 摘要 |
PROBLEM TO BE SOLVED: To provide a manometer, safely releasing pressure, that discharges excessive pressure in response the moment a pressure value of the manometer reaches a predetermined safe pressure maximum value.SOLUTION: A manometer which safely releases pressure comprises a translucent hollow circular pipe body 1, a slider 3, a spring 4, and a cover body 5. In the space in the hollow circular pipe body 1, a left section part 12 and a right section part 11 are formed which have mutually different circular calibers. A radial ring part is formed between the left section part 12 and right section part 11. An opening 112 is formed at an external terminal of the right section part 11 of the circular pipe body 1. A closing wall 121 is formed at an external terminal of the left section part 12. A suction end 13 is formed on the closing wall 121. An air duct is formed in the suction end 13. A scale for display having numbers imparted is provided on an outer surface of the circular pipe body 1. The slider 3 has an opening 32 end formed at one end and a sealing surface 31 formed at the other end.SELECTED DRAWING: Figure 2 |
