Nissan Motor Company Limited

Koichi Takahashi

Nobuteru Hitomi

Taisuke Kizu

Megumu Higuchi

Manabu Tsunematsu

Yoshiaki Kato

Michiaki Sasaki

Hideo Hamada

Hirotsugu Yamaguchi

Tokiyoshi Yanai

Keizaburo Usui

Minoru Watanabe

Yoshikazu Hayakawa

Joji Masuda

Hirotugu Honchi

Kazuo Arita

A filter arrangement disposed in a fuel tank of an automotive vehicle has a flat upper section made of mesh. A lower section made of mesh is joined to the upper section to define a space between the upper and lower sections. The space is filled with fuel filtered by the upper and lower sections and communicates with a fuel pump. The upper and lower sections are different in shape and therefore deform differently under suction due to operation of the fuel pump. This prevents the filter arrangement from collapsing under suction, thereby effectively ensuring a fuel flow passage leading to the fuel pump.

Filter arrangement for a fuel tank comprising shaped mesh sections

An operating valve assembly for a power steering unit comprises inner and outer sleeves in sliding contact with each other and relatively rotatable in response to the twisting of a torsion bar corresponding to a steering load. The outer sleeve is formed in its inner circumferential surface with a plurality of recesses circumferentially spaced apart and having circular opening edges, which recesses are alternately connected to a pump and a drain chamber. The inner sleeve is formed in its outer circumferential surface with grooves establishing communication between adjacent ones of the aforesaid recesses. The outer sleeve is formed with apertures opening into the respective grooves, with the apertures being alternately connected to one or the other of the power cylinder chambers. The operating valve assembly is inexpensive and easy to manufacture.

Operating valve assembly for a power steering

A rotary-motion directional fluid-flow control valve comprising an inner valve element rotatable about an axis therethrough and formed with concavities in its outer peripheral wall, an outer valve body rotatable about an axis aligned with the axis of rotation of the valve element and circumferentially slidable on the outer peripheral surface of the valve element, and plug members which are closely fitting in radial holes formed in the valve body and including a first plug member solid in its entirety and a second plug member formed with an axial bore, the first and second plug members being in registry with the concavities in the valve element in radial directions of the valve body depending upon the relative angular positions of the valve body and element. The valve may be advantageously use in a power-assisted steering system of an automotive vehicle.

Rotary-motion valve and power-assisted steering system incorporating the

The wipers of a windshield wiper are oscillated by a drive shaft driven by a wiper motor. A disc-type contact base member is securely mounted on the drive shaft to carry thereon two electrically conductive plates each of which is contactable with a pair of stationary contacts. When an electrical connection is established between the pair of stationary contacts, a washer pump supplied with electric current is driven to eject a washer liquid through nozzles onto the surface of a windshield. The conductive plates are so located that the electrical connection between the pair of stationary contacts is established only during time periods in which the wiper blades move in both 'go' and 'return' directions from their starting positions to positions which are immediately in front of the positions at which the wiper blades would be struck by the washer liquid being ejected from the nozzles.

Windshield washer of motor vehicle

A vacuum motor operatively connected to a slave cylinder operates same via pressure differential variations across a reciprocatable vacuum motor piston to pump working fluid from a reservoir to an accumulator through two one way valves. The pressure differential variation can be derived from gear changing of the vehicle, induced through a three way electromagnetic valve controlled by a circuit characterized by either an unstable multivibrator, a dual stable multivibrator, a thyristor or a self maintaining relay, or induced through a purely mechanically operated valve characterized by lost motion and snap action position maintain devices. A pressure relief valve may be provided which dumps excessive pressurized fluid in the accumulator and returns same to the reservoir.

Pressured fluid supply system

A constant velocity universal joint comprises an outer joint element having grooves on its spherical inner surface. An inner joint element is positioned within the outer joint element and is provided with grooves on its spherical outer surface to form pairs of opposed grooves with the grooves on the outer joint element. A ball is positioned in every pair of opposed grooves and a cage disposed between the two joint elements retains the balls in a plane perpendicular to the axis of the cage. The cage is guided within the outer joint element by a spherical surface on the outer face of the cage and is guided with respect to the inner joint element by a spherical surface on the inner face of the cage. To facilitate assembly in the joint without weakening structural strength of the cage, the cage is provided with transverse notches or grooves in two diagonal positions. Each groove is formed at a ball aperture and has a width and a depth so as to be capable of receiving a ridge between adjacent grooves on the outer joint element.

Constant velocity universal joint

Clutch control comprising a first three-way valve which is automatically operated by the accelerator to effect the clutch engaging operation of a clutch control pressure differential operated motor and a second three-way valve which is automatically operated, when the clutch plates contact at a predetermined load, to terminate a relatively fast clutch engaging movement of the clutch plates. The motor is also in part controlled by a bleed valve operative to control the loading of the clutch plates as the clutch plates are moved by a clutch spring into firmer engagement with each other. The bleed valve is operative to repeatedly close and open an air bleed port in response to a signal pulse. A pulse width modulator is provided to vary the pulse width of the signal pulse.

Mechanism for modulating clutch engagement

A sliding constant velocity universal joint comprises an annular outer joint member with a polygonal bore within which a ball retaining cage is guided.

Sliding constant velocity universal joint

A sliding constant velocity universal joint comprises an annular outer joint member having an axially extending portions interconnecting the adjacent two grooves of the outer member. Every axially extending portion makes a line-to-line contact with spherical outer surface portion of a ball retaining cage to provide two spaces on the opposite sides of the contacting portion of the axially extending portion.

A constant velocity universal joint comprises an outer member with an axial bore therethrough, a ball retaining cage within the axial bore and having first and second part-spherical outer surface portions which have the centers of curvature offset by an equal amount on opposite sides of the joint center along the joint axis, and inner member within the cage and restraining means having a part-spherical inner surface portion which engages the second part-spherical outer surface portion of the cage to assist in preventing relative movement between the cage and inner member in at least one direction.

Basic pitch curves of a ball nut rack and sector gear of a recirculating ball type steering gear have basic pitch curves which provide a gear ratio which is a desired function of the degree of turn of the steering wheel. The teeth of the rack are formed on a stepped reference line which is different from its basic pitch curve.

Variable ratio vehicle steering gear

Valve opening and closing timing is varied by adjusting the relative angle of the camshaft to the driving crankshaft in dependence on engine load.

Self-adjustable camshaft drive mechanism

A slotted bush disposed about and connected by a cotter to a pump plunger is rotatable by a control rod.

Pump plunger rotating device for plunger-type fuel injection

A fuel injection pump for an automotive fuel injection system, comprising a fuel metering unit which includes a plunger axially movable in synchronism with revolution of a pump shaft and rotatable about its axis for regulating timings and quantities of fuel injection, and a control device which consists largely of a centrifugal governor responsive to a centrifugal force developed by the revolution of the pump shaft for driving the plunger to turn about its axis through an angle proportional to the pump shaft revolution speed and a vacuum-operated actuator responsive to vacuum in an intake manifold of the engine for driving the plunger in accordance with the vacuum in the intake manifold.

Fuel injection pump

A cage having spherical inner and outer surfaces with their respective center points of curvature offset from joint center point to the opposite sides of same.

Growing community of inventors

Yokohama, Japan

Koichi Takahashi