公开(公告)号：US4721494A

公开(公告)日：1988-01-26

申请号：US862477

申请日：1986-05-12

申请人： Tetsuaki Hayashi ,  Hiroshi Itatani ,  Niro Bando ,  Mikio Yuki ,  Nobuyuki Yamashita ,  Hiroyuki Ogasawara ,  Mitsuaki Miyata ,  Kazuaki Kurohara ,  Fumihiro Ikeda ,  Yutaka Nakata

发明人： Tetsuaki Hayashi ,  Hiroshi Itatani ,  Niro Bando ,  Mikio Yuki ,  Nobuyuki Yamashita ,  Hiroyuki Ogasawara ,  Mitsuaki Miyata ,  Kazuaki Kurohara ,  Fumihiro Ikeda ,  Yutaka Nakata

IPC分类号： A01D34/68 ,  F16H7/08 ,  F16H9/14 ,  F16H7/02

CPC分类号： A01D34/6806 ,  F16H7/0827 ,  F16H9/14 ,  A01D2101/00 ,  Y10T74/20189

摘要： A drive transmission structure for a tractor comprising a belt drive system for transmitting power from an engine output shaft to a transmission having a brake mechanism. The belt drive system includes a belt type stepless change speed mechanism having a split pulley assembly and a swing device for swinging the split pulley assembly toward the engine output shaft and the transmission, a first belt for transmitting the power from the engine output shaft to the split pulley assembly, and a second belt for transmitting the power from the split pulley assembly to the transmission. The pulley assembly defines two split pulley sections for engaging the first and second belts, respectively. A control device is provided to change power transmission ratios by actuating the swing device. Further, a tension pulley type clutch mechanism is provided to act on the first belt or the second belt. The brake mechanism and the tension pulley type clutch mechanism are controlled by the clutch and brake control mechanism.

摘要翻译： 一种用于拖拉机的驱动传动结构，包括用于将动力从发动机输出轴传递到具有制动机构的变速器的带驱动系统。 皮带传动系统包括带式无级变速机构，其具有分裂滑轮组件和用于使分动皮带轮组件朝向发动机输出轴和变速器摆动的摆动装置，用于将动力从发动机输出轴传递到 分裂滑轮组件，以及用于将动力从分动皮带轮组件传递到变速器的第二皮带。 滑轮组件限定两个分开的滑轮部分，用于分别接合第一和第二皮带。 提供控制装置以通过致动摆动装置来改变动力传动比。 此外，设置张力滑轮式离合器机构以作用于第一皮带或第二皮带。 制动机构和张紧轮式离合器机构由离合器和制动控制机构控制。

公开(公告)号：USD297538S

公开(公告)日：1988-09-06

申请号：US841390

申请日：1986-03-18

申请人： Hiroyuki Ogasawara ,  Fumihiro Ikeda ,  Yutaka Nakata

设计人： Hiroyuki Ogasawara ,  Fumihiro Ikeda ,  Yutaka Nakata

公开(公告)号：US06764208B2

公开(公告)日：2004-07-20

申请号：US10051293

申请日：2002-01-22

申请人： Yutaka Nakata

发明人： Yutaka Nakata

IPC分类号： B60Q100

CPC分类号： F21V7/04 ,  F21S41/255 ,  F21S41/28 ,  F21S41/335 ,  G02B5/10

摘要： A shape of a vertical cross section and a shape of a horizontal cross section in a lens are formed in a convex shape. Accordingly, even when a prism is not formed, alight transmitting through the lens is largely refracted and an interior section is hard to be visible. As a result, it is not necessary to finish a surface of a reflection surface of a reflector so as to have an optical performance equal to or more than an optical performance required for reflection with taking an appearance into consideration, and a working operation can be easily executed in comparison with the conventional one.

摘要翻译： 透镜中的垂直截面形状和水平截面形状形成为凸形。 因此，即使没有形成棱镜，通过透镜的透射被大量折射，并且内部部分难以看见。 结果，不需要考虑反射器的反射面的表面，使其具有等于或大于反射所需的光学性能的光学性能，并且工作操作可以是 与传统的相比容易执行。

公开(公告)号：US5115038A

公开(公告)日：1992-05-19

申请号：US698863

申请日：1991-05-13

申请人： Kiyohiko Ihara ,  Katsuhide Ontani ,  Yutaka Nakata ,  Toshio Miyatani

发明人： Kiyohiko Ihara ,  Katsuhide Ontani ,  Yutaka Nakata ,  Toshio Miyatani

IPC分类号： C08F8/20 ,  C08F8/22 ,  C08F8/30 ,  C08F214/26

CPC分类号： C08F214/262 ,  C08F8/44 ,  C08F2800/20

摘要： A copolymer of tetrafluoroethylene and a perfluoro(alkyl vinyl ether) having the formula (I):CF.sub.2 .dbd.CF--O--Rf (I)wherein Rf is a perfluoroalkyl group having 3 or 4 carbon atoms; and said copolymer having 1 to 10% by weight of the perfluoro(alkyl vinyl ether) units, having 7 to 20, per 10.sup.6 carbon atoms, of terminal groups --CONH.sub.2, having substantially no --CH.sub.2 OH and no --COF, and having a melt viscosity at 380.degree. C. of 0.1.times.10.sup.4 to 100.times.10.sup.4 poise and a preparation process thereof. The tetrafluoroethylene copolymer is thermally stable and has excellent powder properties. Molded articles thereform have a few bubbles and excellent dimensional stability on heating.

公开(公告)号：US06811289B2

公开(公告)日：2004-11-02

申请号：US10051369

申请日：2002-01-22

申请人： Yutaka Nakata

发明人： Yutaka Nakata

IPC分类号： F21V700

CPC分类号： F21V7/04 ,  F21S41/26 ,  F21S41/28 ,  F21S41/323 ,  F21S41/335 ,  F21S41/336

摘要： A lens has a concave shape or a convex shape in either vertical cross section or transverse cross section. Thereby light passing through the lens is largely refracted and the interior is harder to be seen even if a prism is not formed. As a result, there is no need to give a finish more than optical performance required for reflection to the front surface of the reflecting surface of a reflector, which is for the purpose of enhancement of its appearance, and thereby the machining work is simpler than the conventional way. Further, since the lens has a flat shape in either vertical cross section or transverse cross section, the lens is easily polished when it is made of glass, which is excellent in manufacture of the lens.

摘要翻译： 透镜在垂直横截面或横截面中具有凹形或凸形。 因此，即使没有形成棱镜，通过透镜的光也被大量折射，并且内部难以被看到。 结果，不仅需要比反射器的反射面的前表面反射所需的光学性能更好，这是为了增强其外观的目的，因此加工工作比简单 常规方式。 此外，由于透镜在垂直截面或横截面中具有扁平形状，所以当由玻璃制成时，透镜容易抛光，这在透镜的制造方面是优异的。

公开(公告)号：US5049177A

公开(公告)日：1991-09-17

申请号：US452508

申请日：1989-12-19

申请人： Yutaka Nakata

发明人： Yutaka Nakata

IPC分类号： C03B11/08

CPC分类号： C03B11/082 ,  C03B2215/412

摘要： The method for forming Fresnel lens according to the present invention is such that a Fresnel lens comprising a body with a frontal surface having a plurality of annular Fresnel-type prism elements concentrically disposed thereon and a back surface formed substantially flat is formed from a molten sheet glass. The method comprises a step of preparing cavities of which the shapes are derived from inversion of the shapes of the plurality of annular Fresnel-type prism elements, a step of disposing the molten sheet glass on a stationary mold having a substantially flat surface, a step of pressing the molten sheet glass with a moving mold having the cavities to make a portion of the molten glass flow into said cavities, and a step of solidifying the molten glass and removing the moving mold thereafter. The shapes of said cavities are previously designed so that portions of the molten glass corresponding to the Fresnel-type prism elements flow substantially only within small area corresponding to the corresponding Fresnel-type prism elements while the sheet glass is being pressed. This method permits to minimize surface defects such as wrinkle caused during forming, reduce the time required for forming, and to form a Fresnel lens having excellent optical properties.

公开(公告)号：US5003435A

公开(公告)日：1991-03-26

申请号：US547048

申请日：1990-07-02

申请人： Yutaka Nakata

发明人： Yutaka Nakata

IPC分类号： F21V7/00

CPC分类号： F21S48/1364

摘要： The automotive lamp assembly according to the present invention comprises a divergent-type concave mirror formed by a central reflecting area in which the optical axis lies and peripheral reflecting areas continuously extending rightward and leftward from the central reflecting area, and a lamp bulb disposed on the optical axis of the concave mirror. Either one of the central and peripheral reflecting areas is formed as a first reflecting curved surface composed of a part of a paraboloid of revolution to reflect the incident rays of light from the lamp bulb in directions parallel to the optical axis, and the other is formed as a second reflecting curved surface to reflect horizontally the rays of light from the lamp bulb in directions divergent from the optical axis depending upon the distance from the vertical plane in which the optical axis lies and also reflect vertically the rays of light in directions parallel to each other and to the horizontal plane in which the optical axis lies. The first reflecting curved surface defines a central hot zone in the light distribution pattern, and the second reflecting curved surface defines middle and low illuminance zones extending rightward and leftward from the center of the light distribution pattern. Therefore, the rays of light from the lamp bulb can be effectively utilized and a desired light distribution pattern can be freely obtained.

公开(公告)号：US5662972A

公开(公告)日：1997-09-02

申请号：US185852

申请日：1994-01-25

申请人： Kazuhiko Shimada ,  Yutaka Nakata ,  Kenjiro Idemori

发明人： Kazuhiko Shimada ,  Yutaka Nakata ,  Kenjiro Idemori

IPC分类号： B29C47/06 ,  B29C47/02 ,  B29C59/12 ,  B29D23/00 ,  B29K27/12 ,  B29L9/00 ,  B29L23/00 ,  B32B1/08 ,  B32B27/00 ,  B32B27/30 ,  C08J5/12 ,  C08J7/00 ,  C08J7/04 ,  C08J7/12 ,  F16L9/12 ,  F16L11/04 ,  B29D22/00

CPC分类号： C08J7/12 ,  B29C47/02 ,  B29C47/021 ,  B29C59/12 ,  B29D23/001 ,  B32B38/0012 ,  C08J5/12 ,  C08J7/123 ,  F16L11/04 ,  F16L9/12 ,  B29C47/0016 ,  B29C47/0023 ,  B29C47/0057 ,  B29C47/065 ,  B29K2027/12 ,  B29K2027/18 ,  B29K2105/0085 ,  B29K2995/0072 ,  B29L2009/00 ,  B29L2023/00 ,  C08J2327/12 ,  Y10T428/1352 ,  Y10T428/1359 ,  Y10T428/3154 ,  Y10T428/31544

摘要： A process for producing a tubular laminate which comprises, discharge-treating an outer surface of a tubular fluorine-containing resin molded article in an inert gas atmosphere containing an organic compound having a functional group, extruding a molten resin onto the treated surface and coating the treated surface with the molten resin. According to this process, there can be obtained a strong adhesion between the fluorine-containing resin molded article and the coating resin without using an adhesive. Therefore, an applying step of the adhesive can be omitted and the tubular laminate can be produced continuously.

摘要翻译： PCT No.PCT / JP93 / 00688 Sec。 371日期：1994年1月25日 102（e）日期1994年1月25日PCT提交1993年5月24日PCT公布。 出版物WO93 / 24299 日期1993年12月9日一种管状层压体的制造方法，其特征在于，在含有具有官能团的有机化合物的惰性气体气氛中，对管状含氟树脂成型体的外表面进行排出处理，将熔融树脂挤出到 并用熔融树脂涂覆处理过的表面。 根据该方法，在不使用粘合剂的情况下，可以获得含氟树脂成型体和涂布树脂之间的强粘合性。 因此，可以省略粘合剂的施加步骤，并且可以连续生产管状层压体。

公开(公告)号：US5036438A

公开(公告)日：1991-07-30

申请号：US502224

申请日：1990-03-30

申请人： Yutaka Nakata

发明人： Yutaka Nakata

IPC分类号： F21S8/12 ,  F21V5/00 ,  F21V13/00

CPC分类号： F21S48/1258 ,  F21S48/10 ,  F21S48/1145 ,  F21S48/1168 ,  F21S48/1283 ,  F21S48/145

摘要： In a projector-type head lamp, a reflector having a concave inner reflecting surface, a light source, a shade with a cut-off edge and a projection lens are arranged in order. The inner reflecting surface of the reflector has at least 2 foci and is so designed as to reflect the rays of light emitted from the light source in a direction crossing the optical axis. The light source is disposed near one of the foci of the reflector while the cut-off edge of the shade is arranged in the vicinity of the other focus. The projection lens has an optical axis nearly coincident with that of the reflector and is so formed that the power of refraction thereof becomes progressively greater from the optical axis toward the outer circumference, namely, its peripheral lens area has a focus located in the vicinity of the cut-off edge while its central lens area has a focus located between the cut-off edge and the light source. The colored rays having passed through the peripheral lens area near the outer circumference of the projection lens form a sharp image of the cut-off edge of the shade on a screen, while the white rays having passed through the central lens area in which the optical axis lies form a blurry image of the cut-off edge on the screen. In an illumination pattern defined on the screen, the color fringes formed in the vicinity of the cut-off line are covered by the blurry image defined by the white rays having passed through the central lens area, thereby making the color fringes sufficiently unnoticeable.

公开(公告)号：US4959757A

公开(公告)日：1990-09-25

申请号：US348917

申请日：1989-05-08

申请人： Yutaka Nakata

发明人： Yutaka Nakata

IPC分类号： F21V7/00

CPC分类号： F21S48/1364

摘要： The automotive lamp assembly according to the present invention comprises a divergent-type concave mirror formed by a central reflecting area in which the optical axis lies and peripheral reflecting areas continuously extending rightward and leftward from the central reflecting area, and a lamp bulb disposed on the optical axis of the concave mirror. Either of the central and peripheral reflecting areas is formed as a first reflecting curved surface composed of a part of a paraboloid of revolution to reflect the incident rays of light from the lamp bulb in directions parallel to the optical axis, and the other is formed as a second reflecting curved surface to reflect horizontally the rays of light from the lamp bulb in directions divergent from the optical axis depending upon the distance from the vertical plane in which the optical axis lies and also reflect vertically the rays of light in directions parallel to each other and to the horizontal plane in which the optical axis lies. The first reflecting curved surface defines a central hot zone in the light distribution pattern, and the second reflecting curved surface defines middle and low illuminance zones extending rightward and leftward from the center of the light distribution pattern. Therefore, the rays of light from the lamp bulb can be effectively utilized and a desired light distribution pattern can be freely obtained.