| 摘要 |
PROBLEM TO BE SOLVED: To prevent residual pressure anomalies due to the intrusion of air into a leakage preventing member. SOLUTION: A pressure measuring apparatus includes a pressure measuring device provided with a connection member 6 having a liquid inlet, an oil supply pipe 3, a tubular joint 7 having an upper end connected to the connection member 6 and a lower end connected to the oil supply pipe 3, and a cap-like leakage preventing member 10 arranged in a housing section 9 and comprising an elastic member filled with a liquid inside. The housing section 9 is formed in the joint 7 in such a way that an opening section 8 may be on the side of the connection member 6 and turned upward. The pressure measuring apparatus has an air intrusion preventing section for preventing air contained in the oil supply pipe 3 from passing through between the inner wall of the joint 7 and the outer wall of the leakage preventing member 10, leaking, and intruding into the leakage preventing member 10. COPYRIGHT: (C)2011,JPO&INPIT |
