Abstract: A vibrating gyroscope according to this invention includes a ring-shaped vibrating body 11 having a uniform plane, a leg portion 15 flexibly supporting the ring-shaped vibrating body and having a fixed end, a fixed potential electrode 16, and a plurality of electrodes 13a, 13b, . . . , 13f formed on the plane with a piezoelectric film sandwiched between an upper-layer metallic film and a lower-layer metallic film in a thickness direction thereof. In this case, in a representative example shown in FIG. 1, when one of driving electrodes 13a for exciting a primary vibration of the ring-shaped vibrating body 11 in a vibration mode of cos N? is set as a reference driving electrode, the plurality of remaining electrodes 13b, . . . , 13f are disposed at specific positions.

Abstract: A vibrating gyroscope comprises a ring-shaped vibrating body (11) a leg portion (15) flexibly supporting the body (11) and having a fixed end, a fixed potential electrode (16), and a plurality of electrodes (13a-13d) with a piezoelectric film sandwiched between an upper and a lower-layer metallic film in a thickness direction thereof. When N is a natural number of 2 or more, the plurality of electrodes (13a-13d) include driving electrodes (13a) for a primary vibration in a vibration mode of cosN?, which are each disposed (360/N)° apart from each other in a circumferential direction, first detection electrodes (13b) and second detection electrodes (13d) for detecting a secondary vibration generated when an angular velocity is applied to the body (11), which are each disposed in a certain region related to the driving electrode (13a) Each of the electrodes is also disposed in a certain region of the body (11).

Abstract: The present application provides a technique prevents a regulator arranged on a gas supplying path that supplies gas to a fuel cell installed in a fuel cell system from functioning erroneously, by controlling the pressure increase within the upper stream side of the regulator. The fuel cell system includes a fuel cell, an oxide gas supplying path to supply oxide gas to the fuel cell, a fuel gas supplying path to supply fuel gas to the fuel cell, a secondary regulator arranged on the fuel supplying path, a bypass path communicating the upper stream side path of the secondary regulator with the lower stream side path of the secondary regulator, and a pressure controlling valve that is closed in a case where the pressure difference between the upper stream side path and the lower stream side path is less than a predetermined amount, and opened in a case where the pressure difference between the upper stream side path and the lower stream side path exceeds the predetermined amount.

Abstract: A fuel cell system includes a cell stack body formed by stacking fuel cells on top of each other, end plates arranged at ends in the cell stacking direction of the cell stack body, and a fluid regulation device mounted in a flow path connected to the cell stack body and regulating conditions of fluid flowing in the flow path. The fluid regulation device is fixed to an end plate only at either of a fluid entrance portion and a fluid exit portion of the fluid regulation device.

Abstract: A fuel cell system having a hydrogen supply path for supplying a hydrogen gas to a fuel cell, an injector which is provided in the hydrogen supply path and which regulates the pressure of the gas on the upstream side of the hydrogen supply path to inject the pressure-regulated hydrogen gas to the downstream side of the hydrogen supply path, and a surge tank 81 which is provided in the hydrogen supply path on the upstream side from the injector and which suppresses the fluctuation of the pressure of the gas in the hydrogen supply path.

Abstract: The present invention includes a mounting structure for mounting a component between a first member and a second member. According to the mounting structure, the component is first placed on a surface of the first member. Then, the second member is fitted with the component by a fitting device, so that the component is positioned relative to the second member. Thereafter, the component is fixed in position relative to the first member by a joint device.

Abstract: A high-pressure switching valve device. A valve main body pressed to contact with an end face of a valve seat when the high-pressure switching valve device is closed, and a seal member pressed to contact with the end face of the valve seat when the high-pressure switching valve device is closed. When the high-pressure switching valve device is closed, the seal member is located on a high-pressure side and the valve main body is located on a low-pressure side.

Abstract: In a solenoid valve, for preventing an elastic sheet used in a valve portion from being damaged by high-pressure gas flow, and without a seal in a wiring portion connected to a coil preventing pressure leakage from the wiring portion difficult to be sealed, particularly in a solenoid valve used for distribution control of high-pressure gas, a valve body is made of an inelastic material and dome-shaped, and a sheet surface facing the valve body is divided in a radial direction into an inelastic sheet surface closer to an axis of the valve body in a radial direction, and an elastic sheet surface far from the axis. The former is inclined to the valve body at a predetermined angle &thgr;1 to a line orthogonal to the axis of the valve body. The latter is inclined at an angle &thgr;2 larger than the angle &thgr;1 of the inelastic sheet surface. An elastic sheet surface in a boundary portion between the former and the latter is set on the same position as or lower than the inelastic sheet surface.

Abstract: This invention is intended to greatly improve an allowable pressure limit with a simple structure and without depending on a material strength of a seal member. A high-pressure switching valve device includes a valve main body 10 pressed to contact with an end face 8 of a valve seat when the high-pressure switching valve device is closed, and a seal member 9 pressed to contact with the end face 8 of the valve seat when the high-pressure switching valve device is closed. When the high-pressure switching valve device is closed, the seal member 9 is located on a high-pressure side 1a and the valve main body 10 is located on a low-pressure side 1b. The valve main body 10 is constituted out of a high strength member and the seal member 9 is constituted out of an annular elastic member.