Patent ID: 8415066

Claim:
A pressure regulating valve, comprising: a first pressure deformation portion which is connected to a fuel demand side, which is deformable and which receives a pressure on the fuel demand side; a second pressure deformation portion opposed to the first pressure deformation portion and which is deformable and which receives a predetermined pressure; a first flow passage, a second flow passage, and a communication passage for allowing the first and second flow passages to communicate with each other, the first flow passage, the second flow passage, and the communication passage being disposed in a space between the first and second pressure deformation portions; and a valve member having a connecting portion which extends through the communication passage and connects the first pressure deformation portion and the second pressure deformation portion together, and having a valve element which is provided at the connecting portion and closes the communication passage when moved toward the second pressure deformation portion, and wherein when the pressure on the fuel demand side is lower than a predetermined value, the valve element does not close the communication passage, but when the pressure on the fuel demand side is equal to or higher than the predetermined value, the valve element closes the communication passage.