Patents Assigned to Kabushiki Kaisha Toyoda Jidoshokki
  • Control valve for variable displacement compressor
    Patent number: 6447258
    Abstract: A valve body adjusts opening of a supply passage in response to the position in a valve chamber. A pressure-sensitive member is moved in accordance with the pressure difference between two pressure monitoring points, which are located in an external refrigerant circuit. The movement of the pressure-sensitive member affects the position of the valve body such that the compressor displacement is changed to reduce fluctuations in the pressure difference. A solenoid changes force applied to the valve body so that a set pressure difference, which is a reference value for changing the position of the valve body by the pressure-sensitive member, is changed.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: September 10, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Masaki Ota, Kazuya Kimura, Masahiro Kawaguchi, Ken Suitou, Ryo Matsubara, Taku Adaniya
  • Bearing for swash plate compressor
    Patent number: 6446540
    Abstract: A compressor has a housing and a cylinder bore. A piston is accommodated in the cylinder bore. A drive shaft is supported by the housing. An annular support plate is driven by the drive shaft. The support plate surrounds the drive shaft and inclines with respect to the axis of the drive shaft. The support plate has an boss. A radial bearing located about the boss. The radial bearing has an outer race. A disk-like swash plate is formed integrally with the outer race. The swash plate is connected the piston to cause the piston to reciprocate.
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: September 10, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Masaki Ota, Hirotaka Kurakake, Taku Adaniya, Satoshi Inaji
  • Control valve for variable displacement compressor
    Patent number: 6443707
    Abstract: A control valve for variable displacement compressor that prevents fluid fixation between a rod and a guide hole is provided. A first rod (89) extends through a first guide hole (88) to couple a bellows (87) to a valve body (74). A second rod (96) extends through a second guide hole (95) to couple a movable iron core (93) to the valve body (74). Tapered surfaces (89b, 96b) are formed on the outer surfaces of the first and second rods (89, 96). The space-between each tapered surface (89b 96b) and the inner surface (88a, 95a) of the corresponding guide hole (88, 95) is wider in the vicinity of a high pressure zone (73, 90) than in the vicinity of a low pressure zone (84, 91).
    Type: Grant
    Filed: July 18, 2000
    Date of Patent: September 3, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Kazuya Kimura, Hiroaki Kayukawa
  • Semiconductor module
    Patent number: 6445068
    Abstract: A plurality of MOS transistors are arranged on the top surface of a conductor substrate which is a drain electrode. The drain contact of each MOS transistor is connected to the conductor substrate. The source contact of each MOS transistor is connected to the output conductor path which is a source electrode through a bonding wire. The gate contact of each MOS transistor is connected to a drive signal conductor path which is a gate electrode through a bonding wire. The source contacts of the MOS transistors are interconnected through a bridge electrode and a bonding wire.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: September 3, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Kenichi Sofue, Hiromitsu Yoshiyama, Toshinari Fukatsu, Toshiaki Nagase
  • Method of making a swash plate type compressor piston whose head portion is formed by pore-free die-casting
    Patent number: 6438834
    Abstract: A method of producing a piston for a swash plate type compressor including a head portion which is slidably fitted in a cylinder bore of the compressor, and an engaging section which engages a swash plate of the compressor, wherein a blank including a hollow cylindrical head section corresponding to the head portion and an engaging section corresponding to the engaging portion is formed by a pore-free die-casting method, such that the head section and the engaging section are formed integrally with each other at the closed end by the head section, and wherein a closing member is fixed to the hollow cylindrical head section so as to close its open end, for thereby providing the head portion of the piston.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: August 27, 2002
    Assignees: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Altex Co., LTD
    Inventors: Masato Takamatsu, Takayuki Kato, Seiji Katayama, Shigeo Fukushima
  • Tilt control device for fork lift truck
    Patent number: 6439102
    Abstract: A tilt control device for a fork lift truck comprises a tilt spool for operating the tilt cylinder, a pilot operation type flow rate control valve connected to the hydraulic pump via the tilt spool and adapted to be switched between a fully opened position and a half opened position which are different in opening from each other in response to addition/deletion of a pilot pressure, a pilot operation type logic valve disposed between the rod side oil compartment of the tilt cylinder and the flow rate control valve and adapted to permit hydraulic oil to flow into the rod side oil compartment and to be operated so as to open/close relative to hydraulic oil flowing out of the rod side oil compartment in response to the addition/deletion of the pilot pressure, and an electromagnetic switching valve for controlling the addition/deletion of the pilot pressure to the flow rate control valve and the logic valve.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: August 27, 2002
    Assignees: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Nishina Industrial Co., Ltd.
    Inventors: Takeharu Matsuzaki, Shigeto Nakajima, Makio Tsukada
  • Air-conditioning unit
    Patent number: 6438985
    Abstract: An air-conditioning unit comprises a compressor component for compressing a refrigerant, a condenser component for condensing the refrigerant, and an evaporator component for evaporating the refrigerant. At least two of the compressor, the condenser and the evaporator components is assembled integrally. This prevents with certainty leakage of the refrigerant that circulates through the air-conditioning unit.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: August 27, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventor: Hirohito Hayashi
  • Control valve and method for controlling an air-conditioning system
    Patent number: 6434956
    Abstract: An air-conditioning system has a refrigerant circuit. The circuit includes a condenser, a expansion valve, an evaporator and a variable displacement compressor. The system has a pressure difference detector. The pressure difference detector detects the pressure difference between two pressure monitoring points located on the refrigerant circuit. A control valve and a controller control the displacement of the compressor in accordance with the pressure difference detected by the pressure difference detector. This permits the displacement of the compressor to be quickly changed.
    Type: Grant
    Filed: August 4, 2000
    Date of Patent: August 20, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Masaki Ota, Masahiro Kawaguchi, Ken Suitou, Ryo Matsubara, Taku Adaniya
  • Position detecting device for hydraulic cylinder, and industrial vehicle equipped with the position detecting device
    Patent number: 6435031
    Abstract: An anti-vibration member is provided on an inner wall of a cylinder tube of a lift cylinder. The anti-vibration member is formed into a cylindrical form, and an outer circumferential surface thereof is formed along an inner circumferential surface of the cylinder tube. The anti-vibration member is formed by coating resin high in ultrasonic wave attenuating effect (such as polyphenylene sulfide (PPS) resin). It is possible to attenuate or absorb a vibration of a surface wave transmitted from an ultrasonic wave sensor and indirectly transmitted through the inner wall of the cylinder tube.
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: August 20, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventor: Katsumi Nagai
  • Variable capacity type compressor with check valve
    Patent number: 6435848
    Abstract: A variable capacity type compressor has a swash plate, pistons reciprocating in the cylinder bores, a suction chamber, and a discharge chamber. A check valve arranged in the compressor. The check valve has a valve seat member having a flow passage and a valve seat, a case attached to the valve seat member, and a valve element arranged in the case for cooperation with the valve seat. The case has a communication hole formed therethrough to allow the gas to flow from the flow passage through the communication hole to the outside circuit. The case has a damper chamber formed therein on the back side of the valve element to damp vibration of the valve element.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: August 20, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Kazuhiko Minami, Hiroaki Kayukawa, Kazuya Kimura, Atsuyuki Morishita
  • Mechanism for adjusting toe angle of wheel and steering apparatus
    Patent number: 6435527
    Abstract: A toe-angle adjusting mechanism that accurately adjust a toe angle of a wheel. The mechanism includes adjusting pins and a locking plate. The adjusting pins have eccentric shafts and engagement shafts. The locking plate has engaging holes. The locking plate prevents rotation of the adjusting pins by fitting the engaging holes with the engagement shafts.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: August 20, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventor: Kenichi Katae
  • Compressor with a part of a spring chamber in a rear housing
    Patent number: 6431841
    Abstract: A compressor is provided in which the arrangement and the position of a spring chamber, in which a coil spring biasing a main shaft is accommodated, are designed and the various designs of the compressor is possible.
    Type: Grant
    Filed: February 22, 2001
    Date of Patent: August 13, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Tomoji Tarutani, Yoshinori Inoue, Hiroyuki Yoshida, Masaki Ota
  • Synchronous motors and control circuits therefor
    Patent number: 6433503
    Abstract: Hall ICs 23u, 23v and 23w are provided to detect the magnetic fields of magnetic regions 8 of a rotor 9 and are offset in position by an electrical angle of 30° from central positions of a U-phase stator pole 1, V-phase stator pole 6 and W-phase stator pole 2. A driving circuit 21 controls the timing of rotor driving signals that are supplied to respective stator coils for respective phases based upon rotor position signals outputted from the Hall ICs 23u through 23w. For example, in order to rotate the rotor in a forward direction, the driving circuit 21 controls the timing of the rotor driving signals according to a first logic. Similarly, in order to rotate the rotor in a reverse direction, the driving circuit 21 controls the timing of the rotor driving signals according to a second logic.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: August 13, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Tatsuya Uematsu, Norimoto Minoshima
  • Apparatus for regulating humidity of process air in fuel cell system
    Patent number: 6428915
    Abstract: A fuel cell system having a fuel cell, a gas compressor arranged to compress process air and connected to the fuel cell via an air-supply line to supply the compressed process air, a recovery unit connected to the fuel cell via an exhaust gas line, a liquid-gas separating unit arranged in the exhaust gas line to separate produced water from an exhaust gas and to store the separated produced water in a water storing vessel portion thereof, and a water-supply line extending from the bottom of the water storing vessel portion to a water-supply port provided for the gas compressor to supply the gas compressor with the produced water under the pressure of the exhaust gas applied to the produced water stored in the water storing vessel.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: August 6, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Takashi Ban, Hirohisa Katoh, Masahiko Kimbara, Hidehito Kubo
  • Tilting speed controlling apparatus and method for industrial vehicle
    Patent number: 6425728
    Abstract: A tilt speed control apparatus for fork lift comprises a mast pivotally supported on a body frame. A fork is supported by the mast. The fork is lifted and lowered and is constructed to carry a load. A pump sends hydraulic oil to a tilt cylinder. A motor drives the pump. A lever is actuated to tilt the mast. A controller detects that the lever has been actuated. The controller produces a signal relating to the height of the load carrier. When the controller detects that the lever has been actuated, the controller controls the motor according to the signal such that the speed of the motor is relatively low when the position of the fork is relatively high. This permits a tilting speed controlling apparatus that optimizes the tilting speed of the mast.
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: July 30, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventor: Tetsuya Goto
  • Semiconductor device mounting structure and feeding-side charger with heat radiating unit
    Patent number: 6426874
    Abstract: In a feeding-side charger, a heat transfer unit (23), which comes into contact with a heat radiating duct (16) fixed with a power circuit board (18), is fixed to the power circuit board (18) in which a power conversion circuit is formed. Each main body (22) of a plurality of MOSFETs (21) mounted on the power circuit board (18) comes into contact with the heat transfer unit (23) with a silicone sheet (24) being interposed therebetween.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: July 30, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventor: Katsuyuki Kajiura
  • Control device for variable displacement compressor
    Patent number: 6425254
    Abstract: A controller for a compressor selects a control procedure from a normal displacement control procedure and a temporary control procedure based on information detected by a detector. When the normal displacement control procedure is selected, the controller sends a current, the value of which is based on the detected information, to an electromagnetic actuator. When the temporary displacement control procedure is selected, the controller sends a current having a specific value to the actuator to maximize a target compressor suction pressure. When switching from the temporary displacement control procedure to the normal displacement control procedure, the controller changes the value of the current supplied to the electromagnetic actuator according to a pattern, which is determined based on the detected information, over a predetermined period.
    Type: Grant
    Filed: August 8, 2000
    Date of Patent: July 30, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Masaki Ota, Masahiro Kawaguchi
  • Clutchless variable-capacity type compressor
    Patent number: 6425741
    Abstract: A variable capacity type compressor has a swash plate which can incline with respect to the drive shaft. An angle decreasing spring urges the swash plate to decrease the inclination angle and a return spring urges the swash plate to increase the inclination angle from the minimum inclination angle beyond the limit angle. The minimum inclination angle is smaller than a limit angle at which the swash plate can be assuredly returned in the direction to increase the inclination angle by a reaction force of the discharge pressure, and the angle decreasing spring balances with the return spring at an angle greater than the limit angle. A minimum spring load (F0) of the return spring is greater than 20N. A maximum spring load (F100) of the angle decreasing spring is F100(N)=(180±30)−4×(VD−120).
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: July 30, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Minoru Mera, Kazuya Kimura, Hiroshi Uneyama
  • Compressor and regenerator for fuel cell
    Patent number: 6425746
    Abstract: A compressor and regenerator for a fuel cell according to the present invention comprises a compression mechanism portion C having a compression chamber 14 for pressurizing an oxygen-containing gas to a high pressure to supply air to a fuel cell F, and a regenerative mechanism portion E having a regenerative chamber 24 so constituted as to be operated with the compression mechanism portion C by the same motor M and assisting the motor M using an exhaust gas G exhausted from the fuel cell F. The compression chamber 14 of the compression mechanism portion C and the regenerative chamber 24 of the regenerative mechanism portion E are adjacent to each other. A seal ring grove 80 is defined in a ring-like zone 54b of a center housing 20, and a seal ring 81 is fitted in the seal ring groove 80.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: July 30, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Hidefumi Mori, Ryuta Kawaguchi
  • Swash plate type refrigerant compressor
    Patent number: 6422129
    Abstract: A piston-operated compressor, of swash plate type and using CO2 as a refrigerant, having a casing member in which a cylinder bore is formed to have a cylindrical peripheral wall surface and a piston reciprocating for compression in the cylinder bore and being formed of an aluminum alloy. The outer peripheral surface of the piston is coated with a film of a fluororesin material, and a piston ring of an iron metal is fitted in the neighborhood of the top portion of the piston to permit the CO2 refrigerant to be compressed under high pressure. A first oil groove is formed in peripheral direction in parallel to and below the vicinity of the groove at the top portion of the piston in which the piston ring is fitted, and a second oil groove is formed below the first oil groove extending along the axial direction in parallel with the central axis of the piston.
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: July 23, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Naoya Yokomachi, Tatsuya Koide, Yoshiyuki Nakane