Abstract: A multiple-vane rotary compressor having a cylinder bore profile especially designed to reduce the fluctuation in the overall drive torque applied to the rotor shaft. The cylinder bore profile is configured and designed so that the individual drive torque applied to an individual vane during the compression and delivery strokes varies along a drive torque-vane angle curve which approximates an isosceles triangle having a lower side corresponding to a range of angle of 180.degree.. The cylinder bore profile includes, for a profile section extending through an angle of 180.degree., a first region (i) in which the amount of vane projection is held substantially constant at a maximum value (D), a second region (ii) in which the amount of vane projection decreases at a higher rate, and a third region (iii) in which the amount of vane projection decreases to zero at a lower rate, the imaginary transitional point (A.sub.3) between the second and third regions being located at an angular position of 90.degree..

Abstract: A fluid pump comprises a casing at the rear of which is secured a fixed plate having a forward open longitudinal groove with a C-shaped transversal cross-section. A movable plate is placed at the front of the fixed plate and is held in a close sliding contact with the fixed plate to seal the groove to form a pumping chamber. The movable plate carries an integral pumping member which is in the form of a split-tube extending into the pumping chamber. The movable plate is driven by an eccentric drive so that the pumping member within the pumping chamber performs as oscillatory movement along a circular trajectory with its inner wall in a sealing contact with the inner wall of the pumping chamber, and with its outer wall in a sealing contact with the outer wall of the pumping chamber, thereby performing the intake and compression strokes.

Abstract: Hydraulic fluid supply system for supplying high pressure hydraulic fluid to power actuators for power steering systems includes a pumping mechanism having independent pumping chambers adapted to discharge fluid to a supply line leading to the power actuator. The supply line contains a variable orifice and a flow control valve responsive to the pressure difference generated by the variable orifice. The pumping chambers include at least first and second pumping chambers connected to first and second feed lines. A switching valve operatively interconnected to the variable orifice and actuated by an electrically operable drive mechanism selectively connects the second feed line to the supply line or to the first feed line.

Abstract: A ventilation system for a motor vehicle such as an automobile includes a ventilating hole defined in a body of the motor vehicle for venting an interior of the body to atmosphere, and an aerodynamic device such as an air spoiler mounted on the body at the ventilating hole and having a lower surface held against an outer surface of the body, a front surface for forming a negative angle of elevation with respect to an air current flowing along the body while the automobile is running, and a rear surface for separating the air current off said body. The aerodynamic device has a vent hole extending therethrough from the lower surface to the rear surface in communication with the ventilating hole.

Abstract: A scroll-type pump suitably used as a compressor in an automobile air-conditioning system. The pump is provided with a stationary scroll member and a movable scroll member, which movable scroll member rotates while maintaining contact with the stationary scroll member. A scroll shape of each of the scroll members is formed by a plurality of alternately arranged arc sections of a small radius of curvature and arc sections of a large radius of curvature smoothly connected to each other. A pump having an overall shape which corresponds to the shape of the space in which the pump is to be arranged in the vehicle is obtained.

Abstract: A vane-type rotary pump and a vane-type rotary compressor are integrated into a single unit and are driven by a common shaft. The compressor assembly is positioned at the rear of the pump assembly to minimize the number of mechanical seals required to seal the pump assembly along the shaft. The combined pump and compressor unit is provided with a regulating mechanism for reducing the compressor output during moderate or off modes of the refrigerant circuit.

Abstract: The present invention relates to an improvement in the configuration of the inner face of a housing of a through vane type rotary compressor for use in a car cooler or the like, in which both the top ends of a vane passing through the center of a rotor are always kept in sliding contact with the inner face of the housing.In the present invention, the configuration of the inner face of the housing is determined so that substantial face-to-face contact is produced between the rotor and the housing in a certain region with the point for contact with the rotor being as the center, and the configuration of the subsequent curved portion is defined by such a curve that the velocity of the sliding movement of the vane in the radial direction of the rotor is expressed by a gentle function where said velocity monotonously changes.

Abstract: A vane type rotary compressor comprises a cylindrical housing, side plates secured on axial opposite ends of the housing, a rotor rotatably mounted in the housing and a plurality of vanes each slidably received in one of slots formed in the rotor. The housing, side plates, rotor and vanes cooperates with one another to define a working space of a variable volume. The rotor is formed with an increased diameter portion substantially in a central position of the rotor as viewed in an axial direction of the latter. An axial length (L.sub.4) of the increased diameter portion, an axial length (L.sub.3) of the vanes, an axial length (L.sub.2) of the slots, an axial length (L.sub.1) of the housing, distance (L.sub.5) between a forward end of the slots and a forward end of the increased diameter portion, and distance (L.sub.6) between a rear end of the slots and a rear end of the increased diameter portion have the relationships, L.sub.1 >L.sub.3 >L.sub.4, L.sub.2 >L.sub.3, L.sub.3>L.sub.4 +L.sub.5, and L.

Abstract: A vane pump comprising a cylindrical rotor provided with a diametrically extending vane groove, a vane slidably arranged in the vane groove in radial directions, a cylinder in which the rotor is rotatably arranged, the cylinder having an inner peripheral cam surface with which said vane always comes into sliding contact at its opposed ends, the cam surface of the cylinder having a profile defined by cycloid curves and/or arc portions which have a radius substantially equal to that of the rotor.

Abstract: A rotary compressor including a housing having therethrough a cylindrical bore, end plates attached to the housing to close the open axial ends of the bore respectively, an eccentric rotor rotatable in the bore and vanes slidably mounted in the rotor. A working chamber defined between the adjacent pair of vanes communicates with a discharge chamber outside of the housing through a discharge opening in the wall of the housing. First and second passages have their respective one ends opening to the cylindrical bore and the respective other ends communicating with the discharge chamber. The one end of the first passage is positioned at a location or adjacent thereto where the leading one of the adjacent pair of vanes is positioned when the working chamber defined therebetween has its volume starting to decrease.

Abstract: A vane type pump having a housing formed with an inlet chamber and an outlet chamber and having a cylinder portion, a cylindrical rotor mounted for eccentric rotation in the cylinder portion, and a plurality of vane mounted for concentric rotation in the cylinder portion. The rotor is formed with slots through which the vanes extend into a space defined between the inner peripheral wall of the cylinder portion and the outer peripheral wall of the rotor so as to divide the space to define a working chamber variable in volume for pumping effect. The inlet chamber is associated with the cylinder portion to define a fluid confinement initiating line at which the working chamber begins to be isolated from the inlet chamber when the forward end of one of the vanes passes the line.

Abstract: A rotary compressor including two rotary disc-shaped members having a diameter slightly smaller than that of a rotor each disposed on opposite ends of the rotor and supported on the same rotary shaft as the rotor for rotation, and two disc-shaped recesses each formed on one of inner opposite end surfaces of a housing for receiving therein one of the plurality of rotary disc-shaped members. A small gap is formed between the inner end surfaces of the housing and the end surfaces of the rotor, and small gaps are formed between surfaces of the rotary disc-shaped members and surfaces of the disc-shaped recesses. The area through which a fluid leaks from the high pressure side to the low pressure side in the housing is minimized, and resistance is offered by the tortuous path to the flow of the fluid toward the rotary shaft, to thereby minimize the leakage of fluid during operation of the compressor.

Abstract: A through-vane type rotary compressor having a cylinder chamber of novel shape wherein a segment of the peripheral edge of the cylinder chamber connecting two circularly arcuate segments together has a shape represented by the formula ##EQU1## and the slider has opposite ends each maintained in sliding contact with the peripheral edge at its arcuate end. The slider smoothly rotates along the peripheral edge of the cylinder chamber without impinging thereon while the acceleration of the sliding movement of the slider shows smooth changes.

Abstract: An exhaust gas recirculation apparatus for diesel engines includes an exhaust gas recirculation passage for recirculating exhaust gases from an exhaust pipe to an intake pipe, a valve body for controlling the cross sectional area of the recirculation passage and a pressure regulator for detecting an amount of fuel injection and to output a signal. A diaphragm device is operatively connected to the pressure regulator to receive a pressure signal to control the position of the valve body, whereby in response to an increase of fuel injection the cross sectional area of the recirculation passage is decreased.

Abstract: An optical velocity measuring apparatus applicable to measurement of the velocity of a vehicle relative to the road. A pair of light sensors mounted on the bottom of the vehicle body spaced from each other in a direction of the movement of the vehicle respectively receive rays of light reflected from different spots on the road through an optical system and produce electric signals indicative of the surface conditions of the spots. A time lag from the detection of a particular spot by the forward light sensor until the backward light sensor detects the same spot is measured to determine the velocity of the vehicle. The optical system is comprised of first and second lenses each having a peripheral portion cut away by a plane parallel to the optical axis. The first and second lenses are aligned so that the cut away faces are in contact with each other and that the optical axes are in parallel to and spaced a predetermined distance from each other.

Abstract: A filter element for straining liquid formed of a filter material in a convoluted form including two portions, one portion being a planar portion and the other portion being a corrugated portion having a plurality of elevated areas. The filter material is foled in half in the longitudinal center and wound in convolutions so that a series of letters V are formed on a transverse cross-sectional surface thereof. The pitch of the elevated areas is smaller in the central portion of the convoluted filter element corresponding to the end of the filter material at which winding is started and larger in the outer peripheral portion thereof.

Abstract: A rotary electric machine having a cooling fan comprises a housing of which a front wall has a plurality of air vents. A fan carried and driven by a rotary shaft of the rotary electric machine is arranged near the outer surface of the front end wall of the housing. The fan comprises a disk-shaped fan base plate securely attached to the rotary shaft and a plurality of blades formed by bending by about 90.degree. the peripheral portions of the fan base plate having suitable notches and slots. The width of the blade is gradually reduced from its radially inner edge to its radially outer edge. The front end wall of the housing has a funnel-shaped surface corresponding to the edge of the blade.

Abstract: A rotary electric machine comprising a housing containing therein several parts which are to be heated during operation of the machine, and a centrifugal cooling fan for producing an air circulation through the housing so as to cool the heated parts. The cooling fan is made of a disc-shaped metal plate having on its periphery a plurality of fan blades each formed by bending a radially outer portion of the metal plate upstandingly with respect to the surface thereof, and a plurality of notches each defined between the adjacent fan blades. A backing disc-plate is disposed at the back side of the cooling fan in a manner to block therewith the notches, thereby preventing an air from passing through the notches in an opposite direction from an ordinary air flow passing through the housing. The disc-plate and the cooling fan are disposed to define a small clearance therebetween for preventing rattling noises from being produced during rotation of the cooling fan due to an occasional vibratory contact therebetween.

Abstract: An apparatus for detecting the collision of a vehicle to produce a signal indicating the collision, which signal is adapted to actuate a safety device, such an apparatus having a pair of rotatable rigid members defining therebetween a space in which disposed is a stationary contact adapted to cooperate with a movable contact carried by the rigid members. Spring means are provided for biasing the rigid members in one rotational direction against a rotational force caused by deceleration of the vehicle. The rigid members are provided with a massive weight so as to make the gravitational center eccentric from the rotational axis thereof, thereby an enhanced sensitivity to the deceleration is obtained.

Abstract: Apparatus for detecting collision of a motor vehicle, carried by the vehicle and adapted to produce an electrical signal upon the collision of the vehicle to actuate occupant protection systems. The collision detecting apparatus comprises a rotational member in which the center of gravity is shifted from it's rotational axis so that collision energy applied thereto upon the collision of vehicle is converted into rotational energy of the rotational member, to actuate a contact device for producing the electrical signal. The apparatus is characterized by a simplified and small-sized structure, reliable in operation and generation of the collision signal.