| 摘要 |
PURPOSE:To reduce the overall length and weight by providing first port coupled with pressure gauge port in the body while second port coupled with pressure gauge in the needle. CONSTITUTION:The body 20 is provided with first port 22 coupled with pressure gauge port 21 and a hole 23 for inserting a needle 25 provided continuously with said port while a valve seat 24 is provided in the border of first port 22 and hole 23. The needle 25 to be engaged with the body 20 is arranged such that its axis will coincide with that of the body 20 where a tapered section 26 to be received in the valve seat 24 of body 20 is provided at the leading edge section while second port 27 to be coupled with pressure gauge is provided at the distal end. Consequently, the overall length can be reduced to be approximately same with that of the needle 25. |
