Patents by Inventor Seiji Sumikawa

Seiji Sumikawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4830590
    Abstract: A sliding-vane rotary compressor of the type having a cylinder, a rotor rotatably disposed therein and carrying thereon a plurality of vanes, a pair of side blocks attached to opposite ends of the cylinder, and a pair of heads attached to the side blocks, respectively, the improvement which comprises a partition wall separating an oil sump from a low pressure chamber which is defined by and between one of the side block and the head attached thereto, and at least two connecting passages interconnecting the oil sump and a high pressure chamber which is defined by and between the other side block and the head attached thereto.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: May 16, 1989
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Seiji Sumikawa, Hidehiko Takayama, Yoshio Suzuki, Mitsuya Ono
  • Patent number: 4761967
    Abstract: An air conditioner for vehicle includes a cooler cooled in a cooling circuit which includes a compressor, a heat exchanger located in the vicinity of the cooler, a thermal storage tank connected with the heat exchanger via a heat transfer passage, a pump provided in said heat transfer passage, a first temperature sensor for detecting the temperature TO in close proximity to of the cooler, a second temperature sensor for detecting the temperature TC of the storage tank, and a third sensor for detecting the temperature TR in the car interior, and a heat transfer type partition wall can be integrally provided between a cooling flowing passage of the cooler and a fluid passage of the heat exchanger. The air conditioner for the vehicle serves to cause said pump to be operated to permit cooling energy to be stored when TC is greater then TO and TR is lower than a set value, and to cause said pump to be operated to permit said cooling energy to be radiated when TR is higher than the set value.
    Type: Grant
    Filed: October 11, 1985
    Date of Patent: August 9, 1988
    Assignee: Diesel Kiki Kabushiki Kaisha
    Inventors: Seiji Sumikawa, Yoichiro Furuya, Shinji Sutoh
  • Patent number: 4743184
    Abstract: A rotary compressor features a passage structure and valve arrangement which, under given modes of operation, permits relatively hot gaseous compressed working fluid to be introduced into a chamber proximate a bearing which is subject to cooling and the lubricant therein subject to dilution by working fluid under such conditions, in a manner to warm the bearing and its immediate surroundings and obviate the dilution problem.
    Type: Grant
    Filed: December 5, 1986
    Date of Patent: May 10, 1988
    Assignees: Nissan Motor Co., Ltd., Diesel Kiki Co., Ltd.
    Inventors: Seiji Sumikawa, Haruhiko Takada, Mikio Tanino, Kazuhiro Irie
  • Patent number: 4677830
    Abstract: An air conditioning system for automotive vehicles wherein the temperature and pressure of refrigerant at the outlet of the evaporator are detected, respectively, by a temperature sensor and a pressure sensor, and the flow rate of refrigerant within the refrigerating cycle is controlled to proper values corresponding to thermal load on the system, by controlling the opening of an expansion valve with a valve control means responsive to output signals from the above sensors. The pressure of refrigerant detected by the pressure sensor is converted by conversion means into a corresponding saturation temperature of the refrigerant. Determining means determines whether or not the refrigerant quantity is insufficient by comparing the difference between the refrigerant temperature and the corresponding saturation temperature of the refrigerant with a predetermined reference value. Indicator means indicates abnormality when the refrigerant quantity is determined to be insufficient.
    Type: Grant
    Filed: September 11, 1985
    Date of Patent: July 7, 1987
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Seiji Sumikawa, Ichiro Noguchi
  • Patent number: 4596518
    Abstract: A partition separates a suction passageway axially extending in the compressor main body from a swash plate chamber, and is constructed with a mechanism to introduce a refrigerant medium into the swash plate chamber and toward the swash plate, from a portion of the suction passageway radially outward of the swash plate substantially at a predetermined angle relative to the axis of the drive shaft. Preferably, the compressor includes a delivery control mechanism responsive to pressure in the suction passageway to vary the effective cross-sectional area of the suction passageway.
    Type: Grant
    Filed: January 28, 1985
    Date of Patent: June 24, 1986
    Assignee: Diesel Kiki Co., Ltd.
    Inventor: Seiji Sumikawa
  • Patent number: 4583922
    Abstract: In an improved swash plate type compressor in which a first end block, holding a first valve plate against one end of the cylinder block, defines a first input plenum and an output plenum with input and output valve means for a first set of cylinder chambers, a partition plate is secured between the other end of the cylinder block and a second end block and holds a second valve plate against that end of the cylinder block, defining for a second set of cylinder chambers a second input plenum with input valve means and an output chamber with an output valve means. The second end block defines inlet and outlet buffering chambers to which an inlet and an outlet open. The cylinder block is formed with an input transfer passage communicated at its ends to the first and second input plenums. The partition plate is formed with an output transfer aperture for the output chamber, communicating it to the outlet buffering chamber. Also, a means communicates from the inlet buffering chamber to the input transfer passage.
    Type: Grant
    Filed: December 20, 1984
    Date of Patent: April 22, 1986
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Takeo Iijima, Mototaka Shitara, Seiji Sumikawa, Susumu Saito
  • Patent number: 4580950
    Abstract: A sliding-vane rotary compressor includes an intake pressure control valve disposed within a cylinder head of the compressor and located between an intake passage for a fluid to be compressed and a low pressure chamber. The control valve comprises a pressure responsive element such as a vacuum bellows or diaphragm actuatable in response to either the pressure in the intake passage or the pressure in the low pressure chamber, a pilot valve connected to the pressure responsive element, a pilot passage adapted to be opened and closed by the pilot valve for developing a difference in pressure, a main or differential piston movable in response to the pressure difference developed, and a throttle mechanism responsive to the movement of the piston for varying the area of an orifice through which the intake passage communicates with the low pressure chamber.
    Type: Grant
    Filed: April 19, 1985
    Date of Patent: April 8, 1986
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Seiji Sumikawa, Kagehisa Kato
  • Patent number: 4383642
    Abstract: A heater unit for use in an air conditioner for automotive vehicles comprises: a casing formed therein with an air inlet passage, a discharging air passage communicating the air inlet passage with an upper or face-level air outlet or a floor air outlet, a heating air passage extending from the air inlet passage to the inlet of a heater core, and a hot air passage extending from the outlet of the heater core and terminating at least in a side wall of the heater core where it intersects with the discharging air passage; a temperature adjusting damper for adjusting the ratio of air being supplied from the air inlet passage to the discharging air passage and air being supplied from the air inlet passage to the heating air passage; and an auxiliary damper arranged at the intersection of the air discharge passage with the hot air passage or in its vicinity for interrupting the communication between the latter two passages.
    Type: Grant
    Filed: March 11, 1981
    Date of Patent: May 17, 1983
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Seiji Sumikawa, Kazuo Utsugi
  • Patent number: 4340112
    Abstract: A main duct (12) contains a heater (19) and has an upper air outlet (22). A bypass duct (31) has an inlet (32) communicating with the main duct (12) upstream of the heater (19) and an outlet (33) communicating with the upper air outlet (22). A humidifier (36) is provided in the bypass duct (31). The bypass duct (31) has a circulated air inlet (37) and a proportioning door (38) for controlling the amount of air entering the bypass duct (31) from the main duct (12) and the circulated air inlet (37) to enable temperature control of the humidified air which is discharged from the upper air outlet (22) against the driver's face. An air cleaner (71) may also be provided in the bypass duct (31) and operated with the humidifier (36).
    Type: Grant
    Filed: August 18, 1980
    Date of Patent: July 20, 1982
    Assignee: Diesel Kiki Company, Ltd.
    Inventors: Shinji Sutoh, Seiji Sumikawa, Toshizo Hara
  • Patent number: 4266604
    Abstract: A heat exchanger adapted for use as a hot water radiator for a car heater, or the like, in which a plurality of tubes and a plurality of fins secured thereon extend between two fluid tanks. The fluid tanks each comprise an inner and an outer tank element, both made of synthetic resin. The inner tank element is joined via gaskets with the end portions of the tubes extending therethrough, by means of tube-expansion working, while the outer tank element is united with the inner tank element along corresponding opposed peripheral edges thereof arranged in abutting relation. A pair of partition walls are provided in opposed relation between the inner and outer tank elements, which are joined together in an abutting manner directly or via part of the gasket, to provide a fluid tight partition between an inlet chamber and an outlet chamber defined by the partition walls and the tank elements.
    Type: Grant
    Filed: August 8, 1979
    Date of Patent: May 12, 1981
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Seiji Sumikawa, Hiroshi Niizuma, Hiromichi Tonegawa, Tsuneo Torizuka, Yoichiro Furuya, Norio Takashima