Patent ID: 7901374
Filing Date: 2011-03-08
Classification: A61B,B05B,B26F,B41J,B65D

Abstract:
1. A fluid injection device comprising: a pulse generation section that includes: a first connection flow passage connected to the outlet flow passage, having an end portion; a second connection flow passage connected to the swirl flow generation section; a fluid injection opening formed at the end portion of the first connection flow passage, having a diameter smaller than a diameter of the outlet flow passage, the fluid injection device being a surgical device and the fluid injection opening injecting fluid outside of the surgical device for dissecting or cutting out biopsy tissues; a connection flow passage tube including the first connection flow passage and having rigidity adequate to transmit pulses of fluid flowing from the fluid chamber to the fluid injection opening; a pressure generation section that supplies fluid to the swirl flow generation section; and a reinforcing plate that has an opening whose diameter is substantially equal to a diameter of the fluid chamber, and that is formed between the sealing surface on which the swirl flow generation section is formed or a swirl flow generation plate and the diaphragm, wherein the diaphragm and the reinforcing plate are stacked and attached in intimate contact with each other as an integral body.