Patents by Inventor Hiroshi Iijima

Hiroshi Iijima 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: 5682224
    Abstract: An alignment luminous flux is projected toward the cornea of an eye-to-be-detected by an alignment light projecting optical system. The alignment luminous flux reflected by the cornea is imaged on two light receiving means by an alignment light imaging optical system one of which light receiving means is disposed on the front side of an light collecting position adjacent to the cornea when the cornea is in a correct working distance and the other of which is on the back side.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: October 28, 1997
    Assignee: Kabushiki Kaisha Topcon
    Inventors: Akinari Takagi, Hiroshi Iijima
  • Patent number: 5657029
    Abstract: A glass antenna device for automobile telephone includes a glass panel and an antenna pattern mounted on the glass panel. The antenna pattern has a radiation pattern, a signal leader pattern having a first feeder positioned closely to an edge of the glass panel, and an extension extending from the first feeder toward and connected to the radiation pattern, a shield leader pattern having a surrounding pattern surrounding the first feeder and having a second feeder, and a pair of parallel extensions extending from the surrounding pattern parallel substantially the full length of the extension of the signal leader thereto and disposed one on each side thereof, and a rectangular ground pattern connected to an end of at least one of the parallel extensions of the shield leader pattern.
    Type: Grant
    Filed: October 26, 1995
    Date of Patent: August 12, 1997
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Hiroshi Iijima, Eiichiro Kawasaki, Ryokichi Doi
  • Patent number: 5614966
    Abstract: In order to detect an alignment state while watching an index image, illumination light is first projected onto an anterior segment of a subject's eye (E) from LEDs (21), and then light emitted by another LED (31) is guided to a cornea (C) through an alignment light projecting optical system (30). The light emitted by the LEDs (21, 31) and reflected by the subject's eye (E) is imaged on a CCD camera (26) through an image-formation optical system (20). An index image (SP) and an anterior segment image (E') which are of the reflection light guided to the CCD camera (26) are displayed on a screen (28). The index image (SP) is received by a sensor (46). Based on information about received light obtained by the sensor (46), a comparator (47) detects information about alignment of the subject's eye (E) with an instrument body. According to a detection result obtained by the comparator (47), a display state of the display (28) is changed, so that an operator judges that a desired state of alignment is nearing.
    Type: Grant
    Filed: October 26, 1995
    Date of Patent: March 25, 1997
    Assignee: Kabushiki Kaisha Topcon
    Inventors: Hiroshi Iijima, Mineki Hayafuji
  • Patent number: 5521606
    Abstract: A window glass antenna for use on an automobile rear window glass panel, for example has a radiating pattern to be mounted on the window glass panel a ground pattern to be mounted on the window glass panel in spaced relationship to the radiating pattern. The radiating pattern has a vertical length substantially equal to a quarter wavelength. The ground pattern has a vertical length substantially equal to a quarter wavelength and a horizontal width ranging from a half wavelength to a three-quarter wavelength.
    Type: Grant
    Filed: February 17, 1995
    Date of Patent: May 28, 1996
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Hiroshi Iijima, Jun Hasegawa, Eiichiro Kawasaki, Ryokichi Doi
  • Patent number: 5465123
    Abstract: A noncontact type tonometer is provided which is capable of easily detecting whether optical members of the tonometer are stained with dirt or not, and easily finding which one of the optical members is stained. In the noncontact type tonometer, alignment light emitted by an alignment light source is guided to a subject's eye through an alignment light projecting optical system. Part of the alignment light reflected by the eye does not pass through a discharging nozzle and is received by a first light receiving sensor of a first alignment detecting optical system. On the other hand, the other part of the alignment light reflected by the eye passes through the discharging nozzle and is received by a second light receiving sensor of a second alignment detecting optical system. Stains on the optical members are found by a measuring device by which a quantity level of reflected alignment light received by each of the first and second sensors is detected and compared with each other.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: November 7, 1995
    Assignee: Kabushiki Kaisha Topcon
    Inventor: Hiroshi Iijima
  • Patent number: 5436679
    Abstract: An apparatus for observing and photographing a corneal endothelium includes an illumination optical system 28 for projecting each illumination light emitted by a light source 30 for observation and a light source 32 for photography onto a cornea C of a subject's eye E at an angle, an observing and photographing optical system 29 for receiving scattered light reflected by the cornea C with the endothelial layer and observing and photographing it, and an optical system 1 for observing the anterior segment of the eye E. The observing and photographing optical system 29 is provided with a sensor 47 for detecting an image of the endothelium in focus.
    Type: Grant
    Filed: November 27, 1992
    Date of Patent: July 25, 1995
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Hiroyuki Ohtsuka, Kenjirou Katsuragi, Masaru Sato, Kouji Nishio, Hiroshi Iijima
  • Patent number: 5239302
    Abstract: A first inductance element is series-connected into a reception signal path of an antenna circuit between an antenna element and a receiver. A second inductance element is arranged to connect the antenna circuit to ground. These inductance elements series- and parallel-resonate with a ground stray capacitance of the antenna circuit including a feeder cable, so that reduction of gain of the reception system due to the stray capacitance is improved. A damping resistor is coupled to the second inductance element. The system has high reception sensitivity over a wide reception range with eliminating use of a pre-amplifier.
    Type: Grant
    Filed: February 4, 1992
    Date of Patent: August 24, 1993
    Assignee: Nippon Sheet Glass Company, Ltd.
    Inventors: Masaru Maeda, Harunori Murakami, Hiroshi Iijima, Yuji Baba
  • Patent number: 5198825
    Abstract: An inductance element is arranged to parallel resonate with a ground stray capacitance component of an antenna element on a motor vehicle and a feeder cable to a receiver. Matching means is provided to compensate for a Q-factor of the parallel resonance for improving a reception gain over a wide range in a reception band.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: March 30, 1993
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Kaoru Sakurai, Harunori Murakami, Hiroshi Iijima, Masaru Maeda, Koji Matsuda
  • Patent number: 5113195
    Abstract: A glass window antenna for use in a motor vehicle provides satisfactory antenna characteristics while making best use of the space of a glass window with a heating conductor as the main antenna element which is heated by a pair of power supply lines through choke coils. In a preferred embodiment, a capacitor is connected across the power supply lines at a position between the choke coils and the heating conductor to minimize the loss or leakage of radio signals from the heating conductor through the choke coils. A symmetrical pair of wires coupled with each other is formed on the glass window and connected to ends of the heating conductor to improve a radio wave reception gain.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: May 12, 1992
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Kaoru Sakurai, Harunori Murakami, Masaru Maeda, Hiroshi Iijima, Shouhei Ohara
  • Patent number: 5079560
    Abstract: A vehicle window glass is provided with an antenna to be fit in a window frame of a vehicle such as an automobile. The antenna comprises a plurality of antenna elements which are disposed on a portion of the glass extending generally alongside the window frame. Thus, the antenna elements are spaced from the window frame at a reference or ground potential and preferably close to the sides of the frame. The antenna elements are each designed to have a different length from one another so that they can receive radio waves covering a relatively broad frequency band with a relatively high sensitivity.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: January 7, 1992
    Assignee: Nippon Sheet Glas Co., Ltd.
    Inventors: Kaoru Sakurai, Harunori Murakami, Hiroshi Iijima, Hajime Murakami
  • Patent number: 5033841
    Abstract: An ophthalmological instrument for the use of both corneal configuration and intraocular pressure measurement has alignment watching means for watching an alignment completion state upon receipt of an alignment completion signal which is output by alignment detecting means for detecting the alignment of an apparatus body with respect to an eye to be tested, corneal configuration measuring means for projecting a ring target mark onto the cornea of the eye and measuring a corneal configuration with reference to the ring target image, noncontact type intraocular pressure measuring means for discharging fluid toward the cornea in order to transfigure the cornea and measuring the intraocular pressure with reference to the amount of such transfiguration, and automatic executing means for executing the corneal configuration and intraocular pressure measurements in such a manner as that data of the ring target image is intaken in accordance with output of the alignment watching means in order to obtain data regarding
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: July 23, 1991
    Assignee: Kabushiki Kaisha Topcon
    Inventors: Kouji Nishio, Hiroshi Iijima, Kenjiro Katsuragi, Yoshihiko Hanamura
  • Patent number: 5017933
    Abstract: The disclosure is directed to a vehicle window equipped with a radio antenna as well as a heating defroster. A laminated window glass is employed advantageously which comprises inner and outer plates of glass facing respectively the interior and exterior of the vehicle. The heating structure is mounted on a first surface of the laminated glass. At least part of the antenna elements is formed on a second surface which is different from the first surface supporting the heater elements. The antenna bearing surface and/or heater bearing surface may be any surface of the laminated glass; the outer surface of the outer glass plate should be excluded from the supporting surface, however, because such surface is exposed to the exterior of the vehicle. Therefore, a relatively large area is always available for the antenna structure irrespective of the size of the window. It becomes more flexible and easier to make the design of antenna having the desired characteristics.
    Type: Grant
    Filed: March 22, 1989
    Date of Patent: May 21, 1991
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Kaoru Sakurai, Masaru Maeda, Harunori Murakami, Hiroshi Iijima
  • Patent number: 4934003
    Abstract: A disabled transferring device comprises a stationary base and a rotary base coupled with the stationary base for forming a base assembly. An actuation lever assembly which has an actuation lever having a pivot point in the vicinity of one end and an actuation point at the other end, is pivotally supported on the rotary base of the base assembly. A pivotal support shaft is secured onto the level in the vicinity of the pivot point in such an arrangement that the securing point of the pivotal support shaft is oriented at the pivot point or between the one end and the pivot point with a first distance to the pivot point of the lever. The first distance is much shorted than a second distance between the pivot point and the actuation point. A saddle to mount thereon the disabled is mounted on the top end of the support shaft.
    Type: Grant
    Filed: January 31, 1989
    Date of Patent: June 19, 1990
    Assignee: Echo Corporation
    Inventors: Kiyoshi Hayakawa, Takao Arai, Osamu Tanaka, Hiroshi Iijima, Hiroki Suzuki, Fumiyuki Matsuno, Kenji Misugi
  • Patent number: 4868438
    Abstract: A three-phase induction motor is subjected to countermeasure for the rotor and the stator in order to remove two harmonic components of the orders causing a torque ripple, among a plurality of harmonic components included in a magnetic flux generated in an air gap between a stator core and a rotor core. In the three-phase induction motor, conductor grooves of the rotor core are skewed by an electrical angle of 2.pi./n where n is the order of one of the harmonic components to be removed. In the stator, the number of slots (N) is selected so that an equation N=l.times.m.times.q is satisfied, where l=the number of poles, m=the number of phase, and q is a non integer number representing the number of slots per pole per phase, and the stator winding pitch is determined according to the order of another harmonic component to be removed.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: September 19, 1989
    Assignee: NEC Corporation
    Inventors: Kiyokazu Okamoto, Hiroshi Iijima, Tetsuo Endo, Yukio Miyamoto
  • Patent number: 4755702
    Abstract: A three-phase induction motor includes winding slots and a stator winding. The number of winding slots per pole per phase is a noninteger. The stator winding is a three-phase balanced winding. A pitch s of the winding satisfies s=(r-t)/r or s=r/(r+t) (where t is an odd number and r is the order of a harmonic wave to be suppressed).
    Type: Grant
    Filed: January 6, 1987
    Date of Patent: July 5, 1988
    Assignee: NEC Corporation
    Inventors: Hiroshi Iijima, Tetsuo Endo, Yukio Miyamoto, Kiyokazu Okamoto
  • Patent number: 4519649
    Abstract: A wheelchair is disclosed in which a body support frame pivoted to a main frame can move from a seated posture to a stand-up posture and vice versa without using an external elevating force. The wheelchair includes the main frame for supporting driving wheels and auxiliary wheels and a body support frame formed by interconnecting a lower limb support member, a waist support member and a back rest member to one another. The forward portion of the main frame and the tip portion of the waist support member are turnably supported by a pivot, and an extension member for turnably supporting the waist support member with the pivot as the support point is interposed between the main frame and the waist support member. The motive force for the stand-up operation of the body support frame relies upon the push-up force of the user of the wheelchair (the body lift-up force of the user by his or her upper limbs) and the force of the extension member.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: May 28, 1985
    Assignee: Kanagawa Rehabilitation Center
    Inventors: Osamu Tanaka, Hiroshi Iijima, Masayoshi Ito, Etsumi Okigawa
  • Patent number: 4460454
    Abstract: A process for producing a pitch which is used as a raw material for producing carbon fibers is disclosed. The process comprises subjecting a petroleum heavy residual oil to hydrogenation treatment in the presence of catalysts, removing a low boiling point fraction of the oil by reduced pressure distillation, subjecting the resulting reduced pressure distillation residual oil to solvent extraction treatment, and carrying out thermal modification of the resulting extraction component.By utilizing the process for producing the pitch it is possible to use a wide variety of different types of oils in order to produce carbon fibers. The carbon fibers produced from the pitch produced according to the disclosed process have desirable characteristics.
    Type: Grant
    Filed: January 7, 1983
    Date of Patent: July 17, 1984
    Assignee: Mitsubishi Oil Co., Ltd.
    Inventors: Hiroshi Iijima, Kunihiko Moriya, Kazuhito Tate, Goro Muroga, Kazuhiro Yanagida, Yoshikazu Nakamura, Akiyoshi Inoue, Masahiro Higashi
  • Patent number: 4198659
    Abstract: A television video vertical sync detector which produces a vertical sync pulse. This detector includes a separating circuit for the production of horizontal sync pulses, equalizing pulses and vertical sync pulses, and a phase control oscillator. The phase control oscillator includes a phase comparator low pass filter, a voltage control oscillator for generating clock pulses, a division circuit and a delay circuit. A sampling circuit is used to generate the final vertical sync pulse.
    Type: Grant
    Filed: October 26, 1977
    Date of Patent: April 15, 1980
    Assignee: Nippon Electric Co., Ltd.
    Inventors: Hiroshi Iijima, Yasushi Sano
  • Patent number: 4109161
    Abstract: A memory circuit with protection circuit having particular application to MOS-IC memories is disclosed. The protection circuit prevents the memory from being damaged by an undesirable turn-on or turn-off sequence of main and substrate voltage supplies or by an abnormal substrate voltage.
    Type: Grant
    Filed: February 8, 1977
    Date of Patent: August 22, 1978
    Assignee: Nippon Electric Company, Ltd.
    Inventor: Hiroshi Iijima
  • Patent number: 4035985
    Abstract: An apparatus for wrapping goods in a sheet of a stretchable film material comprises a resiliently deformable pad above a wrapping station, a gripping device for holding fast edge portions of the sheet so that the sheet extends horizontally beneath the pad, a mechanism for upwardly stretching a central portion of the sheet to form a bubble until the top of the bubble reaches the pad, a mechanism for lifting goods to be wrapped into the bubble until the top of the goods is urged against the inner surface of the top of the bubble and two pairs of tucking plates disposed to form a rectangle around the lower part of the bubble and movable inwardly to tuck the marginal portions of the bubbled sheet against the bottom of the goods. The goods are not brought into frictional engagement with the sheet during the stretching whereby the sheet is stretched uniformly throughout the bubbled central portion thereof.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: July 19, 1977
    Assignee: Asahi-Dow Limited
    Inventors: Kozo Aoyama, Hiroshi Iijima, Shizuo Kikuchi