公开(公告)号：US5012890A

公开(公告)日：1991-05-07

申请号：US323667

申请日：1989-03-15

申请人： Katsuo Nagi ,  Kazunari Furukawa

发明人： Katsuo Nagi ,  Kazunari Furukawa

IPC分类号： H04R1/28 ,  H04R3/00

CPC分类号： H04R1/2826 ,  H04R3/002

摘要： In an acoustic apparatus in which a vibrator is arranged in a Helmholtz's resonator having an open duct port, and the vibrator is driven to radiate a resonant acoustic wave, a duct resonance absorbing means is provided to the open duct port constituting the Helmholtz's resonator so as to remove an unnecessary resonant sound other than a Helmholz's resonant sound caused when the Helmholtz's resonator is driven, thereby removing noise in a radiated acoustic wave and improving distortion characteristics.

摘要翻译： 在具有开口管口的亥姆霍兹共振器中设置有振子的声学装置中，驱动该振动体以辐射共振声波，在构成亥姆霍兹共振器的开口管道上设置管道共振吸收装置， 以除去在亥姆霍兹共振器被驱动时引起的赫尔姆霍尔斯共振声音以外的不必要的共振声音，从而消除辐射声波中的噪声并改善失真特性。

公开(公告)号：US5109422A

公开(公告)日：1992-04-28

申请号：US413381

申请日：1989-09-27

申请人： Kazunari Furukawa

发明人： Kazunari Furukawa

IPC分类号： H04R1/02 ,  H04R1/28 ,  H04R3/00

CPC分类号： H04R1/2826 ,  H04R1/023 ,  H04R3/002

摘要： An acoustic apparatus comprises a Helmholtz resonator which has a cavity and an open duct port for causing the cavity to communicate with an external region thereof and a vibrator which is arranged in the resonator to drive the resonator. In a first aspect, the open duct port comprises an air permeable member having a proper acoustic resistance and a viscoelastic member having no air permeability so that noise caused by an open duct resonant, wind noise, turbulence or the like is prevented. In a second aspect, a viscoelastic member is disposed at the mounting portion between the open duct port and a cabinet defining the cavity so that transmission to the cabinet of derivative vibration causing at the open duct port is prevented. In a third aspect, the portion, opposite to the open duct port, of an ornament grille attached to the front surface of the acoustic apparatus is given a larger air permeability than other portions of the grille so that wind noise when the grille is attached before the open duct port is prevented. Thus, noise generated when the resonator is driven is prevented or eliminated and distortion characteristics of the apparatus are improved.

公开(公告)号：US4997057A

公开(公告)日：1991-03-05

申请号：US323680

申请日：1989-03-15

申请人： Kazunari Furukawa

发明人： Kazunari Furukawa

IPC分类号： H04R1/02 ,  H04R1/28 ,  H04R3/00 ,  H04R3/04

CPC分类号： H04R1/2826 ,  H04R3/04 ,  H04R1/2819

摘要： An acoustic reproduction range expanding apparatus includes a closed or bass-reflex speaker system which has a low-frequency drive speaker and can reproduce a sound to a predetermined lowest frequeny. A port portion adapter consists of a mounting portion attached to an openng formed in a closed cabinet or a bass-reflex port of a bass-reflex cabinet, and a port portion. The port portion constitutes a Helmholtz's resonator together with the cabinet when the port portion is attached to the cabinet, and has a port shape so that a resonance frequency becomes lower than the lowest frequency. A drive portion adapter consists of an amplifier for driving the low-frequency drive speaker, and eliminates or invalidates an internal impedance inherent to the low-frequency drive speaker. The amplifier generates a negative impedance component in an output impedance.

公开(公告)号：US5173575A

公开(公告)日：1992-12-22

申请号：US326880

申请日：1989-03-21

申请人： Kazunari Furukawa

发明人： Kazunari Furukawa

IPC分类号： H04R1/28 ,  H04R3/04

CPC分类号： H04R1/2826 ,  H04R3/04 ,  H04R1/2857

摘要： A compact acoustic apparatus in which a vibrator is arranged in a Helmholtz resonator having a resonance port, and is driven to radiate a resonant acoustic wave so as to perform lower bass sound reproduction, is characterized in that a cabinet is reduced in size by externally projecting the resonance port from the cabinet, and/or a boundary condition change buffer means is arranged at an opening portion of the resonance port to prevent noise caused by an air flow flowing through the resonance port.

公开(公告)号：US5010977A

公开(公告)日：1991-04-30

申请号：US379583

申请日：1989-07-13

申请人： Kazunari Furukawa ,  Daisuke Suzuki

发明人： Kazunari Furukawa ,  Daisuke Suzuki

IPC分类号： H04R1/28 ,  G10K11/02 ,  G10K11/04 ,  H04R1/02

CPC分类号： G10K11/04

摘要： An acoustic apparatus comprises a plurality of resonators having different resonance frequencies, each of which is constituted by a closed cavity and acoustic mass for causing the cavity to acoustically communicate with an external region. A housing enclosing the plurality cavities is integrally formed. Resonance acoustic radiation portions of the resonators are arranged adjacent to each other on one side of the housing, whereby sound sources which correspond to the acoustic mass can be concentrated.

摘要翻译： 声学装置包括具有不同谐振频率的多个谐振器，每个谐振频率由封闭空腔和音质构成，用于使空腔与外部区域声学地连通。 封闭多个腔体的壳体整体形成。 谐振器的共振声辐射部分在壳体的一侧彼此相邻布置，从而可以集中对应于声音质量的声源。

公开(公告)号：US06305168B1

公开(公告)日：2001-10-23

申请号：US09525639

申请日：2000-03-14

申请人： Kazunari Furukawa

发明人： Kazunari Furukawa

IPC分类号： F02B3344

CPC分类号： F02B75/22 ,  F01M13/04 ,  F01M2013/027 ,  F02B67/10 ,  F02B2075/1832

摘要： A V-type engine having a turbocharger located between two banks, and an oil shield between the turbocharger and a valley of the banks. The oil shield blocks the oil spattered from the interbank valley so that flying of the oil to the turbocharger from the interbank valley is prevented. The oil shield may be an oil shielding plate. The oil shielding plate includes a cover portion covering a lower part of the turbocharger, and a plurality of extensions extending from the cover potion to be mounted on the engine. The cover portion has an oil outlet to allow a leakage oil to escape from the cover portion therethrough. An oil drain is formed in the interbank valley, and the leakage oil collected by the cover portion drops onto the interbank valley from the oil outlet of the cover portion and is subsequently discharged from the engine through the oil drain.

摘要翻译： 具有位于两个组之间的涡轮增压器的V型发动机，以及在涡轮增压器和气缸的谷之间的油屏蔽。 油盾挡住了从银行间山谷喷出的油，从而防止了油从同业间山谷向涡轮增压器的飞行。 油屏蔽可以是油屏蔽板。 油屏蔽板包括覆盖涡轮增压器的下部的盖部分和从盖部分延伸的多个延伸部分，以安装在发动机上。 盖部分具有出油口以允许泄漏的油从盖部分穿过其逸出。 在同行山谷中形成排油口，并且由盖部收集的泄漏油从盖部的油出口落到同一间隙谷上，然后通过排油口从发动机排出。

公开(公告)号：US5014320A

公开(公告)日：1991-05-07

申请号：US353444

申请日：1989-05-17

申请人： Katsuo Nagi ,  Kazunari Furukawa

发明人： Katsuo Nagi ,  Kazunari Furukawa

IPC分类号： H04R3/00 ,  H04R3/04

CPC分类号： H04R3/007 ,  H04R3/04

摘要： A driving apparatus for driving an electro-acoustic transducer comprises a main body portion and a control information storage body which is arranged independently of the main body portion and is selectively separated from or coupled to the main body portion, as needed. The control information storage body stores a real circuit or information for setting electrical characteristics of the driving apparatus.A driving apparatus further comprises a protection circuit for preventing a disadvantageous result of the driving apparatus and a load caused by an unstable operation and the like when the control information storage body is attached/detached to/from the main body portion or when an inappropriate control information storage body is loaded onto the main body portion.

公开(公告)号：US20110114040A1

公开(公告)日：2011-05-19

申请号：US12940644

申请日：2010-11-05

申请人： Hisayuki HASHIMOTO ,  Atsushi Nakajima ,  Kazunari Furukawa

发明人： Hisayuki HASHIMOTO ,  Atsushi Nakajima ,  Kazunari Furukawa

IPC分类号： F02F1/10

CPC分类号： F02F1/14 ,  F01P2003/021

摘要： A spacer fitted inside a water jacket which is formed to surround peripheries of cylinder bores in a cylinder block of an internal combustion engine includes: a spacer main body part partitioning the water jacket into an upper cooling water passage and a lower cooling water passage; and a cooling water outlet and inlet port part continuing to the spacer main body part. A center of a thickness of the cooling water outlet and inlet port part is offset in a radial direction from a center of a thickness of the spacer main body part. Accordingly, when cooling water passes the cooling water outlet and inlet port part, the pressure loss can be reduced in such a way that the cooling water outlet and inlet port part does not interfere with the passage.

摘要翻译： 安装在水套中的间隔件，其被形成为围绕内燃机的气缸体中的气缸孔的周围，包括：将水套分隔成上部冷却水通道和下部冷却水通道的间隔件主体部; 以及连续到间隔件主体部分的冷却水出口和入口部分。 冷却水出口和入口部分的厚度的中心从间隔件主体部分的厚度的中心沿径向偏移。 因此，当冷​​却水通过冷却水出口和入口部分时，可以降低压力损失，使得冷却水出口和入口部分不干扰通道。

公开(公告)号：US5004066A

公开(公告)日：1991-04-02

申请号：US330470

申请日：1989-03-30

申请人： Kazunari Furukawa

发明人： Kazunari Furukawa

IPC分类号： H04R1/02 ,  H04R1/28 ,  H04R3/00

CPC分类号： H04R1/2819 ,  H04R3/002

摘要： In an acoustic apparatus in which a vibrator which drives a Helmholtz resonator having an open port by one surface thereof and directly radiates an acoustic wave from the other surface thereof is arranged in the Helmholtz resonator, the open port is arranged coaxially with the vibrator, and the vibrator is driven to cancel an air counteraction from the resonator when the resonator is driven. According to this construction, the acoustic apparatus can be rendered compact and the clear sound localization can be realized.

摘要翻译： 在亥姆霍兹共振器中设置有将从其一个表面驱动具有开放端口的亥姆霍兹谐振器并从其另一个表面直接辐射声波的振动器的声学装置，开口与振动器同轴地布置， 当谐振器被驱动时，振动器被驱动以消除来自谐振器的空气反作用。 根据该结构，可以使声学装置变得紧凑，并且可以实现清晰的声音定位。

公开(公告)号：US4953655A

公开(公告)日：1990-09-04

申请号：US330457

申请日：1989-03-30

申请人： Kazunari Furukawa

发明人： Kazunari Furukawa

IPC分类号： H04R1/28 ,  H04R3/00

CPC分类号： H04R1/2819 ,  H04R1/2834 ,  H04R3/002

摘要： Disclosed is a compact, wide-range acoustic apparatus which can perform lower bass sound reproduction and is free from noise or distortion components. Spatially separated first and second chambers are formed. The first and second chambers communicate with each other through a port, so that the first chamber and a resonance port constitute a Helmholtz resonator. An open port is formed in or a passive vibrating body is arranged on the outer wall surface of the second chamber, so that the second chamber and the opening or the passive vibrating body constitute an essential low-pass type acoustic filter. A vibrator is attached to the outer wall surface of the first chamber, so that the Helmholtz resonator is driven at the inner surface side of the vibrating body of the vibrator, and an acoustic radiation is directly performed from its outer surface side. The vibrator is driven to cancel an air counteraction from the resonator when the Helmholtz resonator is driven. A cutoff frequency of the acoustic filter is set to be higher than a resonance frequency of the Helmholtz resonator and to be lower than the open duct resonance frequency of the resonance port.