Nissan Motor Company Limited

Shigeki Yoshioka

Takeshi Fujishiro

Akira Higashimata

Satoru Ichikawa

Masayuki Touda

Hideyuki Shibuya

Makoto Tamuraya

Hideyuki Miyamoto

A displacement magnifying device for magnifying the displacement of a piezoelectric element according to an applied voltage, is applied to a vibration absorber and an actuator. The device includes a member for supporting the element, a first elastic sealing member forming part of a sealed chamber containing a non-compressible fluid which moves together with the other end of the element, a second elastic sealing member also forming part of the chamber, and a displacement transmitting member connected to the second sealing member. Preferably, the first sealing member is a diaphragm and the second sealing member is a bellows. By setting the volume change of the chamber per unit displacement of the first sealing member to be larger than the volume change of the chamber per unit displacement of the second sealing member, the displacement of the piezoelectric element is magnified and transmitted to the displacement transmitting member.

Displacement magnifier for piezoelectric element

A vehicle door mirror assembly has a stationary base unit, a door mirror unit mounted on the base unit so that the mirror unit is swingable about a vertical swing axis, an ultrasonic motor for supplying power to swing the mirror unit, a fixed gear fixed to the base unit, and a speed reducing gear set. The ultrasonic motor and the gear reducing gear set are both mounted on the mirror unit. The speed reducing gear set has a driving gear driven by the motor, an intermediate gear engaged with, and driven by, the driving gear, and a driven gear which is connected with the intermediate gear by a joint shaft and which is engaged with the fixed gear. When the motor drives the driving gear, the driven gear is driven by the driving gear at a reduced speed, and moves around the fixed gear to swing the mirror unit about the axis of the fixed gear. This door mirror assembly is advantageous in compactness, durability and efficiency.

Motor driven retractable outside mirror for vehicle

A system for controlling a fluid pressure such a brake fluid pressure of a vehicle includes a pressure control cylinder having a control piston for varying a pressure of a confined fluid, and a motor for producing a mechanical force for actuating the control piston. To reduce the load of the motor, a hydraulic assist circuit is interposed between the motor and the control piston. The hydraulic assist circuit creates a hydraulic assist pressure by receiving the force of the motor, and converting the assist pressure into a linear motion of the control piston. The mechanical force of the motor is converted to hydraulic assist pressure through a pressurizing piston. The hydraulic assist pressure created by the pressurizing piston is exerted against a working piston. The working piston is connected to the control piston. A reduced motor load is obtained by making the area of the working piston larger than the area of the control piston, and the area of the control piston larger than the area of the pressurizing piston.

Hydraulic modulator with working piston connected to control piston

A system for controlling a fluid pressure includes a pressure modulating cylinder unit having a piston and a cylinder housing defining first and second fluid chambers separated by the piston, a cutoff valve unit for isolating the first and second chambers from a pressure source and from each other, and a motor unit for pushing and pulling the piston to vary the fluid pressure in the first chamber. When the system is used for controlling a brake fluid pressure of a vehicle, the first chamber is connected with a wheel cylinder, and the valve unit is arranged to isolate the wheel cylinder and the first and second chambers from a master cylinder.

Hydraulic modulator with equal, opposing chambers formed by a piston

A sunvisor body is selectively movable from a stored position wherein it is concealingly received in an enclosure formed between the vehicle roof and a headliner. Upon reaching a fully projected position, a drive rail arrangement including a crank mechanism induces the visor body to pivot to a predetermined shading position.

Growing community of inventors

Yokohama, Japan

Shigeki Yoshioka