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11. 发明授权

US07360388B2 Hollow stepped shaft and method of forming the same 有权
标题翻译：空心阶梯轴及其形成方法
公开(公告)号：US07360388B2
公开(公告)日：2008-04-22
申请号：US11605568
申请日：2006-11-29
申请人： Shigeaki Yamanaka , Takeshi Kazama , Masahiro Dohi
发明人： Shigeaki Yamanaka , Takeshi Kazama , Masahiro Dohi
IPC分类号： B21J13/00 , B21D28/00
CPC分类号： B21J1/025 , B21C23/205 , B21C37/16 , B21J5/02 , B21J5/08 , B21J5/10 , B21K1/06 , B21K1/12
摘要： A hollow stepped article is formed from a solid blank to reduce the material cost, and cracking is prevented in a stepped portion of large diameter when a portion of the blank is deformed by its radial expansion. A hollow stepped shaft is formed by holding an upper and a lower part axially of a solid rod-like blank with an upper and a lower die, respectively, which have a stepped recess of large diameter in a region where they are opposed to each other; compressing the blank from both its axially opposite sides with an upper and a lower punch each of which is smaller in diameter than the blank, thereby extruding the blank so that an axial hollow is formed therein about its axis in each of its upper and lower parts and that a portion of the blank opposed to the stepped recess of large diameter expands in diameter and deforms into that recess while leaving a solid plug-like portion between the punches; and thereafter further compressively moving one of the punches to shear the solid plug-like portion and force it out of the blank, whereby the blank is formed with a stepped portion of large diameter by radially expanding deformation in a region intermediate between its opposed ends or at one of these ends and with a continuous axial hollow about its axis.
摘要翻译：由实心坯料形成中空阶梯制品，以减少材料成本，并且当坯料的一部分通过其径向膨胀变形时，可以防止在大直径的阶梯部分中的开裂。通过在具有上模和下模的实心棒状坯料的轴向保持上下两部分而形成中空阶梯轴，所述上模和下模分别具有彼此相对的区域中的大直径的阶梯形凹部 ; 通过上下冲头将坯料从其两个轴向相对的两侧压缩，每个上冲头和下冲头的直径小于坯件直径，从而挤压坯件，使得在其上部和下部各自的轴上形成轴向中空并且与大直径的阶梯式凹槽相对的坯料的一部分直径扩大并变形成该凹槽，同时在冲头之间留下固体塞状部分; 然后进一步压缩移动其中一个冲头以剪切固体塞状部分并将其压出坯料，由此坯料通过在其相对端之间的区域中径向膨胀变形而形成有大直径的阶梯部分，或在其中一个端部处并且围绕其轴线具有连续的轴向中空。

12. 发明申请

US20050061597A1 Electromagnetic coupling 失效
标题翻译：电磁耦合
公开(公告)号：US20050061597A1
公开(公告)日：2005-03-24
申请号：US10822207
申请日：2004-04-08
申请人： Shigeaki Yamanaka , Masahiro Dohi
发明人： Shigeaki Yamanaka , Masahiro Dohi
IPC分类号： F16D27/10 , C22C37/04 , C22C38/00 , C22C38/06 , F16D27/00 , F16D27/115 , F16D27/14 , F16D47/00
CPC分类号： F16D28/00 , F16D27/004 , F16D27/115 , F16D27/14
摘要： Disclosed is an electromagnetic coupling designed to strengthen the magnetic force exerted from an electromagnetic coil in the direction in which a pilot clutch is operated. In the electromagnetic coupling with the pilot clutch for activating a main clutch wherein clutch plates are thrust with a retaining ring moved by magnetic force produced by an electromagnetic coil in the pilot clutch, the electromagnetic coil in the pilot clutch is surrounded with ferromagnetic material over at least two of its three facial sides other than its magnetic force exerting facial side, namely over at least its rear and outer facial sides and the ferromagnetic material is covered with nonmagnetic material.
摘要翻译：公开了一种电磁耦合，其被设计成加强从电磁线圈施加的先导离合器操作方向的磁力。在与用于启动主离合器的先导离合器的电磁耦合中，其中离合器片被推动，其中由通过先导离合器中的电磁线圈产生的磁力而移动的保持环，先导离合器中的电磁线圈被铁磁材料包围，其三个面部中的至少两个除了其施加面部侧面的磁力之外，即至少其后面和外侧面以及铁磁材料被非磁性材料覆盖。

13. 发明授权

US5711174A Roll forming method and device 失效
标题翻译：辊成型方法和装置
公开(公告)号：US5711174A
公开(公告)日：1998-01-27
申请号：US682978
申请日：1996-07-16
申请人： Masahiro Dohi , Yoshiyuki Yamashina
发明人： Masahiro Dohi , Yoshiyuki Yamashina
IPC分类号： F16D25/0638 , B21D53/28 , B21H1/00 , B21H1/06 , B21H7/18 , B21D22/16
CPC分类号： B21H1/06 , B21D53/28 , B21H7/187
摘要： A roll forming method is used for forming an annular product with a radially outwardly extending flange portion at an end and includes steps of holding a center portion of a work for forming the annular product by a holding device, rotating the work, contacting a circumferential end portion of the rotating work with a forming roller to be pressed to form the flange portion while retaining a circumferential outer end of the work. The present invention is advantageous in that the resultant product has a good quality without deficiency, such as underfill of the material and has an improved toughness unlike a cast product, a product made by welding and the like of the same structure.
摘要翻译：辊成型方法用于在端部形成具有径向向外延伸的凸缘部分的环形产品，并且包括通过保持装置保持用于形成环形产品的工件的中心部分的步骤，旋转工件，使周向端部旋转工件的一部分与成形辊一起被压制以形成凸缘部分，同时保持工件的周向外端。本发明的优点在于，与铸造产品，通过焊接制成的产品等相同的结构，所得产品具有良好的质量而没有缺陷，例如材料的底部填充，并且具有改善的韧性。

14. 发明授权

US5018599A Headphone device 失效
标题翻译：耳机设备
公开(公告)号：US5018599A
公开(公告)日：1991-05-28
申请号：US408569
申请日：1989-09-18
申请人： Masahiro Dohi , Koji Nageno
发明人： Masahiro Dohi , Koji Nageno
IPC分类号： H04R1/10
CPC分类号： H04R1/1008 , H04R5/0335
摘要： A headphone device includes a pair of housings each attached to a hanger and supporting a loudspeaker unit, and a headband having opposite ends to which the hangers are secured. Each housing includes a front plate to which the loudspeaker unit is attached and a main body portion preferably constructed of natural wood and enclosing the loudspeaker unit with the exception of a front surface of the loudspeaker unit. The inner surface of the main body portion of the housing includes a plurality of irregularities which prevent the generation of standing waves and scatter the housing resonant locations so as to maintain a high quality of reproduced sound.

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