Prong Or Blade (e.g., Plug-type Housing) Patents (Class 337/198)
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Patent number: 6616484Abstract: A plug has a plug casing, an inner tube received in the plug casing and having two recesses oppositely defined in a top of the inner tube to receive therein a first blade and a second blade, a fuse tube having therein a spring, a fuse retainer with legs extending out therefrom and a fuse. The spring abuts the fuse retainer and the legs securely clamp the fuse. A fuse engaging ring is connected to the fuse tube. A connecting ring is engaged with the inner tube to electrically connect to the first connecting leg of the fuse engaging ring. After the connection of the connecting ring to the inner tube which has the fuse tube, the spring, the fuse retainer and the fuse therein, the fuse electrically connects to the fuse engaging ring and therefore the connecting ring.Type: GrantFiled: January 17, 2003Date of Patent: September 9, 2003Inventor: Tsui-Tuan Fan Wong
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Patent number: 6556120Abstract: A fuse (20) includes a fuse element (25), having a fusible portion (22) provided between inner side edges (21a) of a pair of parallel flat-plate terminal portions (21, 21), and an insulating housing (23) covering the inner side edges (21a) of the flat-plate terminal portions (21) and the fusible portion (22). A middle portion (21f) of each of the flat-plate terminal portions (21), located at the lateral position relative to the fusible portion (22), is fixedly gripped by a mating terminal (11) of a fuse mounting portion, so that the flat-plate terminal portion is electrically connected to the mating terminal.Type: GrantFiled: December 6, 2001Date of Patent: April 29, 2003Assignee: Yazaki CorporationInventors: Takayoshi Endo, Norihiro Ohashi, Eiji Shimochi
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Patent number: 6556121Abstract: A fuse assembly which can securely halt an electric power supply to a load after a blowout of a fuse element in the fuse assembly is provided. The fuse assembly 1 has a pair of terminals 2, a housing 4 and a fuse element 5. Ends 3a of the terminals 2 are received into the housing 4. A pair of the terminals 2 and the fuse element 5 are formed integrally with each other. The fuse element 5 has a pair of supporting parts 39 and the central part 40. The supporting part 39 has a first extended part 41 connected to an end surface 8 of the terminal 2. The central part 40 connects a pair of the supporting parts 39 with each other and is situated at the center between a pair of the terminals 2. A thickness T2 of the fuse element 5 at the central part 40 is formed smaller than a thickness T1 of the fuse element 5 at the first extended part 41.Type: GrantFiled: March 29, 2001Date of Patent: April 29, 2003Assignee: Yazaki CorporationInventors: Takayoshi Endo, Goro Nakamura, Hiroki Kondo, Takahiro Sato
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Publication number: 20030076213Abstract: A fuse (20) includes a fuse element (25), having a fusible portion (22) provided between inner side edges (21a) of a pair of parallel flat-plate terminal portions (21, 21), and an insulating housing (23) covering the inner side edges (21a) of the flat-plate terminal portions (21) and the fusible portion (22). A middle portion (21f) of each of the flat-plate terminal portions (21), located at the lateral position relative to the fusible portion (22), is fixedly gripped by a mating terminal (11) of a fuse mounting portion, so that the flat-plate terminal portion is electrically connected to the mating terminal.Type: ApplicationFiled: December 2, 2002Publication date: April 24, 2003Applicant: YAZAKI CORPORATIONInventors: Takayoshi Endo, Norihiro Ohashi, Eiji Shimochi
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Patent number: 6529113Abstract: A presser spring (43) is separately formed with a fuse body (33), and therefore may be formed of a material having a high spring characteristic. The presser spring (43) is attached to a portion of peripheral wall portions (41b) to which a back plate portion (41a) is opposed, so that a mating tab terminal (39), inserted in an engagement space (45), is pressed against the back plate portion (41a) by the presser spring (43).Type: GrantFiled: May 8, 2001Date of Patent: March 4, 2003Assignee: Yazaki CorporationInventors: Takayoshi Endo, Hiroki Kondo, Goro Nakamura, Norihiro Ohashi, Takahiro Satoh
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Patent number: 6522234Abstract: A plug-in fuse 200 comprises a body 201 with side indented portions 203 which allow secure gripping by the thumb and finger of a hand. The side indented portions define upper and lower extended portions 319, 321 allowing insertion and retraction forces to be exerted on the fuse. The improved body shape allows quick and easy insertion of the fuse in high-density fuse holders. A temperature-responsive material 323 in close proximity to the burnout portion of the fuse element provides visual and/or tactile indication of fuse condition.Type: GrantFiled: August 14, 2000Date of Patent: February 18, 2003Inventor: Edward G. Sturgill
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Publication number: 20030001715Abstract: An electrical safety connector fuse for insertion into a two- or three-pin electrical socket comprises a sealed, tamper-proof housing having live and neutral apertures, and live and neutral receptacles for receiving the prongs of a plug, live and neutral prongs for insertion into the socket, and a fuse disposed within the housing. The connector fuse desirably has an internal light which lights up when the fuse is connected to a live socket, a blocking member or gate to prevent a user from receiving an electric shock by inserting objects into the live aperture of the fuse, and an insulting coating on at least a part of the live prong to prevent electric shocks as the fuse is inserted into a socket.Type: ApplicationFiled: February 28, 2002Publication date: January 2, 2003Inventor: William A. Montague
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Patent number: 6459356Abstract: A subminiature time delay fuse device (300) that is capable of withstanding higher current ratings includes at least one time delay fuse (310) for receiving a power signal and for providing an open circuit when the power signal is determined to be excessive for a predetermined period of time. The subminiature time delay fuse device (300) has a high-temperature housing (320) that has a plurality of vent holes formed therein, and wherein the housing partially encloses at least one time delay fuse (310). There are two conductive terminals (305) with an upper end for mounting the time delay fuse (310) and a lower end for mating into a socket (235) on an electrical device, such as an amplifier (125).Type: GrantFiled: August 25, 2000Date of Patent: October 1, 2002Assignee: Scientific-Atlanta, Inc.Inventors: Jonathon Dout, Doyle Dowd, Paul Rossetti
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Patent number: 6448785Abstract: A fuse extractor and puller including a generally cylindrical fuse receiving portion, a lifting and inserting tower attached to the cylindrical fuse receiving portion, and a gripping head attached to the tower and having specially molded characters etched thereon. The tower portion of the fuse puller is hollow and incorporates a continuity detector having an indicator for indicating the condition of a fuse comprising a light extending through the top of the gripping portion, and first and second spring contacts attached to the continuity detector, adapted to contact the electrical terminals of a fuse positioned within the puller. The tower further includes a cantilevered support for supporting the continuity detector so that the light may be pressed downwardly against the gripping portion and the stress created thereby is absorbed, preventing damage to the light.Type: GrantFiled: June 9, 2000Date of Patent: September 10, 2002Assignee: Pass & Seymour, Inc.Inventors: Richard Rohmer, Thomas J. Livingston
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Patent number: 6407657Abstract: A metallic element for use with a blade fuse or other electrical component, and a blade fuse or other electrical component that includes that metallic element as one of its components. The fuse maybe mounted in a fuseholder having either male terminal receiving clips, or female terminal receiving clips. The metallic element includes two terminal portions, each made of a first prong and a second prong. The second prong is spaced apart from the first prong, and a fusible link is secured to each of the two terminal portions. The spaced apart first and second prongs together form a gap between them to ensure secure engagement of the first and second prongs with male terminal blade-receiving clips.Type: GrantFiled: February 3, 2000Date of Patent: June 18, 2002Assignee: Littelfuse, Inc.Inventor: Seibang Oh
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Patent number: 6359543Abstract: A fuse (20) includes a fuse element (25), having a fusible portion (22) provided between inner side edges (21a) of a pair of parallel flat-plate terminal portions (21, 21), and an insulating housing (23) covering the inner side edges (21a) of the flat-plate terminal portions (21) and the fusible portion (22). A middle portion (21f) of each of the flat-plate terminal portions (21), located at the lateral position relative to the fusible portion (22), is fixedly gripped by a mating terminal (11) of a fuse mounting portion, so that the flat-plate terminal portion is electrically connected to the mating terminal.Type: GrantFiled: February 13, 2001Date of Patent: March 19, 2002Assignee: Yazaki CorporationInventors: Takayoshi Endo, Norihiro Ohashi, Eiji Shimochi
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Patent number: 6333846Abstract: A power supply shut-off apparatus 10 includes a fuse-accommodating box 14, a power supply-side bus bar 15, a load-side bus bar 16, and a plug 18 for connecting a power supply and a load through a fuse 13. A mounting portion 17 is provided with an insulation wall 11, a terminal 16a of the power supply-side bus bar 16 is located on one surface side of the insulation wall 19, and a terminal 11 of the fuse 13 is located on the other surface side of the insulation wall 19. The plug 18 is formed of a plug housing 49 and a terminal member 50 having a U-shaped cross section, the terminal member 50 is mounted astride the insulation wall 19 for electrically connecting the terminals 11, 12 of the fuse 13 to either one of terminals 15a, 16b of the power supply-side bus bar 15 and the load-side bus bar 16.Type: GrantFiled: April 25, 2000Date of Patent: December 25, 2001Assignee: Yazaki CorporationInventors: Shigemi Hashizawa, Hidehiko Kuboshima, Masayuki Karamatsu
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Patent number: 6157287Abstract: A fuse system includes a fuse holder having an outer surface; a pair of fuse clips mounted inside the fuse holder, the pair of fuse clips being recessed from the outer surface of the fuse holder a predetermined distance; an insulative fuse housing; a fuse element mounted within the insulative fuse housing; blade terminals electrically connected to the fuse element and extending from the fuse housing; and an insulative sleeve on each of the blade terminals, the insulative sleeves extending from the fuse housing and covering a portion of each of the respective blade terminals and leaving a remaining portion of the blade terminals exposed; wherein the exposed portions of the blade terminals are less than the predetermined distance so that when the blade terminals make an electrical contact with the fuse clips, the exposed portions of the blade terminals are within the fuse holder and only the insulative sleeves are exposed.Type: GrantFiled: March 3, 1999Date of Patent: December 5, 2000Assignee: Cooper Technologies CompanyInventors: Robert Stephen Douglass, Matthew Rain Darr, Daniel Eugene Rowton
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Patent number: 6144283Abstract: A temperature detectable current fuse comprises a temperature detecting fuse having a fusible portion, a current fuse having a fusible portion and a table portion provided at the fusible portion thereof, on which the fusible portion of the temperature detecting fuse is mounted, and a housing having a chamber into which the temperature detecting fuse and the current fuse are inserted through an opening of the chamber.Type: GrantFiled: May 14, 1999Date of Patent: November 7, 2000Assignee: Yazaki CorporationInventor: Norio Matsumura
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Patent number: 6075435Abstract: A disconnect box is provided in the present invention that has a rear wall and perimetrically bounding side walls connected thereto. A line wire and a load wire are received in the disconnect box, which comprises a line terminal mounted in the disconnect box and to which the line wire is connected, a load terminal mounted in the disconnect box and to which the load wire is connected, and a fuse releasably secured in the disconnect box. The fuse has an operational position wherein the fuse contacts the line terminal and the load terminal thereby creating mechanical and electrical connection between the line wire and first load wire, and a non-operational position such that when the fuse is disconnected from the line terminal and the load terminal the mechanical and electrical connection between the line wire and the load wire is broken.Type: GrantFiled: April 2, 1999Date of Patent: June 13, 2000Assignee: Thomas & Betts International, Inc.Inventor: Walter Jeffcoat
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Patent number: 6052059Abstract: A fuse plug, in particular for terminal blocks in control, regulation and power supply systems, essentially comprising a housing, a fuse-element which is fused upon overshooting of a specific current intensity, contact elements and a display element. Reliable protection against surge voltages is provided. The device ensures that production can be automated with low costs by virtue of the housing (1) being formed from two flat holding halves (2, 3) that can be folded by means of a film hinge 4. The division of the housing is provided in the plane of the plug contacts (5, 6). The fuse-element (7), plug contacts (5, 6) and a display device (19) with a signalling element (15) are arranged in one holding half (2) of the housing (1).Type: GrantFiled: May 22, 1998Date of Patent: April 18, 2000Assignee: Krone GmbHInventor: Jim Alfred Jaeger
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Patent number: 6011458Abstract: In large-current fuse unit, a large-current fuse has a pair of terminals interconnected by a fuse element, and a housing receives the large-current fuse therein, and a temperature fuse is mounted within the housing, and is disposed in close proximity to the fuse element. The temperature fuse is melted by heat generated from the fuse element.Type: GrantFiled: March 16, 1999Date of Patent: January 4, 2000Assignee: Yazaki CorporationInventors: Takayoshi Endo, Goro Nakamura
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Patent number: 5963122Abstract: In large-current fuse unit, a large-current fuse has a pair of terminals interconnected by a fuse element, and a housing receives the large-current fuse therein, and a temperature fuse is mounted within the housing, and is disposed in close proximity to the fuse element. The temperature fuse is melted by heat generated from the fuse element.Type: GrantFiled: October 23, 1997Date of Patent: October 5, 1999Assignee: Yazaki CorporationInventors: Takayoshi Endo, Goro Nakamura
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Patent number: 5945903Abstract: A circuit protection device including a pair of terminals to be electrically connected into an electrical circuit, a pair of spaced current-carrying extensions of the terminals, and an initially low resistance current limiting device extending between the current-carrying extensions. The invention includes the feature that the current-limiting element including flexible conductive current-feeding arms having inner and outer end portions, the inner end portions thereof being electrically connected to the current-carrying extensions of the terminals. The outer end portions of the current-feeding arms are cantilevered and flexible relative to the inner end portions. The device further preferably includes a PTC current-limiting element sandwiched between the flexible outer end portions of the current-feeding arms.Type: GrantFiled: August 30, 1997Date of Patent: August 31, 1999Assignee: Littelfuse, Inc.Inventors: Nagi Reddi Kanamatha Reddy, Robert Swensen, Thomas F. Draho, Michael Styrna
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Patent number: 5929740Abstract: A female fuse includes two female terminal portions and a fuse link with a skived region. The fuse link can have first and second ends with first and second pellet regions, each pellet region having a pellet hole therein, the first and second pellet regions being substantially symmetrically spaced on opposing sides of a central axis of the female fuse. Such a fuse link also includes first and second art-forming strips substantially symmetrically connecting the first and second pellet regions to one another, an interior portion of the arc-forming strips being substantially formed from a die section which is independent of the die section which forms the exterior shape of the female fuse. The female fuse terminals each have female-forming terminal plates and female-forming side plates, the terminal plates each having a spring portions, the spring portions being formable into contacting springs for the male terminals. A female fuse housing is also provided for the female fuse.Type: GrantFiled: October 20, 1997Date of Patent: July 27, 1999Assignee: Littelfuse, Inc.Inventors: Seibang Oh, James J. Beckert, Theodore W. Humphrey, William P. Hendrickson
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Patent number: 5929739Abstract: A fuse includes a fuse element having a pair of terminal portions interconnected by a fusible portion, pivot pawls provided between the fusible portion and each of the terminal portions, seat surfaces respectively supporting the pivot pawls thereon, thereby holding the fuse element within an insulating housing, and pivotal movement-allowing spaces for allowing two portions of the fuse element, separated from each other when the fusible portion is melted, to be pivotally moved about the pivot pawls inside and outside the insulating housing.Type: GrantFiled: July 7, 1997Date of Patent: July 27, 1999Assignee: Yazaki CorporationInventor: Mitsuhiko Totsuka
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Patent number: 5917399Abstract: A method of adjusting pre-arcing time-current characteristic for a fuse is performed in a manner that a fusible portion I serving in a dead short-circuit area and a fusible portion II serving in a rare short-circuit area are coupled in series to form a fuse element, and entire pre-arcing time-current characteristic for the fuse is adjusted by combining pre-arcing time-current characteristic of the respective fusible portions I and II. A fuse structure is formed by a fusible portion I serving in a dead short-circuit, and a fusible portion II serving in a rare short-circuit area coupled in series with the fusible portion I serving in a dead short-circuit area. The fusible portion II serving in a rare short-circuit area is formed by material which is different in conductivity and melting point from those of material forming the fusible portion I serving in a dead short-circuit area.Type: GrantFiled: December 4, 1997Date of Patent: June 29, 1999Assignee: Yazaki CorporationInventor: Takashi Ishii
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Patent number: 5900798Abstract: In the metal piece 32 which diffuses into the fuse element so that an alloy layer is generated, there is formed an expanding slot 30, which is inserted and pressured in the fusing portion 25b of the fusible body 25 which forms the fuse element. Due to the foregoing, the metallic mass 32 of low fusing point is fixed to the fusible body 25 while it surrounds the circumferential surface of the fusing portion 25b.Type: GrantFiled: March 26, 1998Date of Patent: May 4, 1999Assignee: Yazaki CorporationInventors: Hisashi Hanazaki, Kenji Muramatsu, Mitsuhiko Totsuka, Toshiharu Kudo
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Patent number: 5898357Abstract: A fuse comprising: a fusible portion constituted by a connection portion which is formed of the same metal base material as a pair of terminals so as to connect the pain of terminals to each other, and a low-melting metal having a melting point lower than that of the connection portion and stacked by welding on at least a portion of the connection portion; and at least one protrusion formed on the fusible portion by making the connection portion and the low-melting metal project in a direction parallel to the plane of an interface between the connection portion and the low-melting metal. Further disclosed is a method of manufacturing the fuse. The fuse can be manufactured with a simple manufacturing process in comparison with a conventional method, and in the fuse, only the fusing-off time in a layer short-circuit range can be shortened by use of diffusion between the low-melting metal and base material.Type: GrantFiled: December 9, 1997Date of Patent: April 27, 1999Assignee: Yazaki CorporationInventors: Takayoshi Endo, Takashi Ishii, Naoki Matsuoka
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Patent number: 5894258Abstract: The invention disclosed an improved structure for combination type fusible plugs, comprising a shell and two individual plug seats that can respectively combine with conductor copper blades, fuses, and electrical wires and then be housed inside the shell to form a complete fusible plug. With an effective separation of electrical wires, conductor copper blades, and fuses from each other, the plug structure of the invention can provide more safety in use.Type: GrantFiled: March 3, 1998Date of Patent: April 13, 1999Inventor: Yen Chun Chang
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Patent number: 5883561Abstract: A secondary short preventing mechanism of a fuse is constituted by a pair of female terminal members in which male terminal receiving portions are formed at their longitudinally one ends respectively so that the male terminal receiving portions are to be engaged with and electrically connected to male terminal portions, and a fuse fusing portion is formed between their longitudinally other ends connected to each other; and a housing for housing the female terminal portions, and having a vertically extending insulation partition for horizontally separating the female terminal portions from each other. Each of the male terminal receiving portions has raised pressing contact portions which face each other at different levels, that is, at upper and lower positions in its longitudinal direction, the upper pressing contact portion being projected toward the insulation partition and having elasticity, respectively.Type: GrantFiled: November 20, 1997Date of Patent: March 16, 1999Assignee: Yazaki CorporationInventors: Goro Nakamura, Kenji Muramatsu, Naoki Matsuoka
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Patent number: 5883560Abstract: A fusible member of a fusible link element used as a large-current fuse comprises a sealed box-shaped structure having a pouring hole through an upper wall thereof. Molten tin is poured into this sealed box-shaped structure through the pouring hole, and is solidified to be integrated with the sealed box-shaped structure.Type: GrantFiled: January 22, 1997Date of Patent: March 16, 1999Assignee: Yazaki CorporationInventors: Goro Nakamura, Kenji Muramatsu
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Patent number: 5847635Abstract: A fuse element which has an enhanced durability against a rush current, and is suppressed in temperature rise. The fuse element includes a pair of terminals, a fusible element interconnecting the pair of terminals, and at least one load portion is formed on the fusible element. The fusible element and the load portion are made of the same material.Type: GrantFiled: October 18, 1996Date of Patent: December 8, 1998Assignee: Yazaki CorporationInventor: Toshiharu Kudo
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Patent number: 5841338Abstract: A fuse combination in which a group of fused elements are placed on an insulative support. The support is bent into a U-shape carrying the fuse elements with it. Contacts at the ends of the fuse elements extend beyond the corresponding edges of the support and are adapted to be inserted into a socket. To make the combination, the fuse elements are stamped out of a metal plate which has a thin central section. This thin section becomes the fusible portions of the fuse elements. A band at either end of the fuse elements connects them so that they can be handled as a unit. They are then placed on the support, secured thereto, and a preferably transparent cover is placed over the fusible portions.Type: GrantFiled: April 15, 1997Date of Patent: November 24, 1998Assignee: Sumitomo Wiring Systems, Ltd.Inventor: Jun Yasukuni
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Patent number: 5841337Abstract: A safety fuse system includes a safety fuse including a fuse casing having a bottom surface and opposing end surfaces at each end of the bottom surface; a fuse element inside the fuse casing; a pair of electrical contacts connected to the fuse element, the electrical contacts extending through openings in the bottom surface of the fuse casing to an exterior of the fuse casing; the openings being located at a distance from the opposing end surfaces so that the electrical contacts are remote from the opposing ends; a fuse holder including a fuse holder casing having a top surface, the top surface including apertures for receiving the electrical contacts of the safety fuse, the apertures being in alignment with the safety fuse openings when the safety fuse is engaged with the fuse holder; metal contacts within the fuse holder casing for receiving the electrical contacts.Type: GrantFiled: January 17, 1997Date of Patent: November 24, 1998Assignee: Cooper Technologies CompanyInventor: Robert Stephen Douglass
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Patent number: 5821847Abstract: To effectively prevent the efflux at the time of depositing a fusible metal, a fuse includes a clamping piece in the longitudinal middle portion of a fusible element, a fusible metal having a low melting point is clamped by and deposited on the clamping piece, in which the fusible metal is deposited on the fusible element while parts of the fusible metal exposed when fusible metal is clamped with the clamping piece, are covered with enclosing walls that are formed by bending the fusible element on both sides of the clamped part to the sides of the fusible metal.Type: GrantFiled: March 27, 1997Date of Patent: October 13, 1998Assignee: Yazaki CorporationInventor: Mitsuhiko Totsuka
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Patent number: 5818320Abstract: A fuse having a pair of blade-type male terminals inserted into one opening of a fuse housing, which is made of synthetic resin, having a through hole. An element portion of the fuse is removably inserted into the other opening of the housing. The element portion includes a pair of leg portions fitted at their distal ends in element holding portions on the terminals. A fusible portion interconnecting proximal ends of the leg portions and one end of a connecting portion extending in a direction opposite to a direction of extending of the terminals. A heat-radiating plate portion is formed integrally on the other end of the connecting portion, and is covered with a cover. The cover is exposed exteriorly of the housing when the element portion is inserted into the housing.Type: GrantFiled: September 29, 1997Date of Patent: October 6, 1998Assignee: Yazaki CorporationInventor: Naoki Matsuoka
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Patent number: 5818321Abstract: There is disclosed a fuse with a secondary short-circuit prevention mechanism in which a melting portion, when melted, will not be brought into an unstably supported-condition, thereby positively preventing the melting portion from being again short-circuited. A fuse element 23 includes a pair of parallel terminal portions 29 and 29 interconnected by a connecting portion 31, and a fusible portion 33 is formed at the connecting portion 31. A housing 25 includes terminal receiving chambers for respectively receiving the terminal portions 29 and 29, and a fuse element receiving space for receiving the connecting portion 31, the terminal receiving chambers communicating with the fuse element receiving space.Type: GrantFiled: October 17, 1997Date of Patent: October 6, 1998Assignee: Yazaki CorporationInventors: Kenji Muramatsu, Goro Nakamura
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Patent number: 5798683Abstract: An improved fuse plug is provided. The fuse plug includes a housing, a pair of first and second fuse chambers formed in opposite side of the housing, a first blade directly connected with a first cord, a second blade indirectly connected with a second cord via a cartridge fuse disposed in the first fuse chamber, a stand-in cartridge fuse reserved in the second fuse chamber and both the fuse chambers are closed by a pair of waterproof safety fuse doors. A sleeve member made in conforming with the housing is sleeved on the housing and a fuse pick which is made from flexible plastic wraps on the cartridge fuse for facilitating a ready removal of the fuses from the chambers.Type: GrantFiled: July 19, 1996Date of Patent: August 25, 1998Inventors: Mei-Mei Lin, Li-Wen Liu
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Patent number: 5767761Abstract: In a fusible link connection box, a pair of through holes through which terminal legs of a large male fusible link are to be respectively passed are opened in the bottom of a rectangular cup-like portion which is disposed in the upper portion of the base body, and a pair of terminal pieces to which a small female fusible link is to be connected are disposed within the through holes. The terminal pieces protrude from the upper ends of bus bars which are fastened together with lead wire terminals to terminal nuts which are attached to the sides of a center wall. The center wall vertically downward elongates from the bottom.Type: GrantFiled: April 26, 1996Date of Patent: June 16, 1998Assignee: Yazaki CorporationInventors: Kenji Muramatsu, Toshiharu Kudo
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Patent number: 5751208Abstract: A system for establishing and terminating the flow of electrical current through a circuit which includes a fuse puller which engages and retains a standard plug-in fuse element. The system also includes a housing which supports the fuse puller and associated fuse in a first, raised position which separates the fuse from its corresponding contact terminals, and a second, lowered position in which the fuse contacts the terminals.Type: GrantFiled: August 15, 1996Date of Patent: May 12, 1998Assignee: Alcoa Fujikura Ltd.Inventor: Ivan V. Martinez
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Patent number: 5748067Abstract: There is provided a fusing portion constituted by a high-melting point fusible metal element for coupling a pair of box-type terminals in the form of a link, and a low-melting point fusible metal element disposed at a substantially center portion of the high-melting point fusible metal element and containing a reducing element.Type: GrantFiled: December 19, 1996Date of Patent: May 5, 1998Assignee: Yazaki CorporationInventors: Takashi Ishii, Naoki Matsuoka
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Patent number: 5745024Abstract: For providing a fuse element for slow-blow fuses which uses no separate endothermic member, a fuse element for slow-blow fuses in which wings are formed on both sides of slender element portions connecting top ends of a pair of female terminals by way of narrow and short bridges by punching out of a single electrically conductive sheet.Type: GrantFiled: September 26, 1996Date of Patent: April 28, 1998Assignee: Pacific Engineering Co., Ltd.Inventors: Manabu Ohta, Akihiko Shimizu
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Patent number: 5739741Abstract: A metal chip of low-melting metal having a cavity is fixedly held by an embracing portion of a fusible portion of a fuse of a fusible metal conductor. The metal chip has a predetermined outer diameter, and by changing a diameter of a through hole defining the cavity, the volume of the cavity can be adjusted. By doing so, fusion characteristics of the fusible portion can be adjusted.Type: GrantFiled: August 22, 1996Date of Patent: April 14, 1998Assignee: Yazaki CorporationInventors: Hisashi Hanazaki, Mitsuhiko Totsuka
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Patent number: 5736918Abstract: A fuse includes a tube, a pair of blade terminals projecting from opposite ends of the tube, at least one fuse element disposed in the tube and electrically coupled between the terminals, and a pair of metallic end caps disposed on opposite ends of the tube. Electrically insulative elements are disposed between the end caps and the terminals. The tube is filled with an arc-quenching material inserted through a fill hole that is plugged by a plastic drive rivet. Each terminal is attached to a metallic end plate by means of a staking tang inserted into a slot of the end plate, and by means of a separate solder joint. Each insulative element includes an axial sleeve through which a respective terminal extends for a part of its length. The fuse element having a one-piece metal element bent to form a pair of parallel, superimposed strips divided into sections by means of fusible weak points.Type: GrantFiled: June 27, 1996Date of Patent: April 7, 1998Assignee: Cooper Industries, Inc.Inventor: Robert S. Douglass
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Patent number: 5704811Abstract: An electrical plug includes a base body having a front surface on which two blade slots are formed to receive therein conductive blades with the blades partially projecting out of the slots from a top end of the base body. Each of the conductive blades has a sharpened member in electrical connection therewith, wherein one of the conductive blades has a fuse connected between the blade and the sharpened member. A casing is fit over the base body to enclose and retain the blades, together with the sharpened members therein. An end portion of an electrical wire is received within the casing through an opening. The end portion of the wire is guided to run from the front surface of the base body to an opposite rear surface and then back to the front surface through two through holes formed on the base body. The base body further has a central slots formed between the two blade slots to receive the sharpened members therein.Type: GrantFiled: October 31, 1996Date of Patent: January 6, 1998Inventor: Chao-Chih Hsu
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Patent number: 5682130Abstract: The invention is a circuit protection device comprising a first and a second female terminal. The device further comprises a first fuse clip in electrical contact with the first fuse terminal and a second fuse clip in electrical contact with the second fuse terminal. A positive temperature coefficient element, preferably planar, is positioned between and makes electrical contact with both the first fuse clip and the second fuse clip. In a first embodiment, at least one of the first and second fuse clips is spring-loaded, i.e., has an inherent resiliency. In this same embodiment, portions of the first and second fuse clips overlap, and the positive temperature coefficient element is secured between the overlapping portions of the first and second fuse clips. In the second of the two preferred embodiments, the first fuse clip, the second fuse clip, and the positive temperature coefficient element are generally coplanar.Type: GrantFiled: June 7, 1995Date of Patent: October 28, 1997Inventors: Michael Styrna, Andrew Tomlinson
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Patent number: 5680089Abstract: A fuse in which molten metal can be positively held or retained in a housing when a fuse element melts, and the melting of the fuse element can be easily confirmed. The fuse includes the fuse element including opposite side portions respectively defining a pair of metal terminals which are connected together through an element having a fusible portion, and are disposed in a generally common plane, and a flap of a metal material which is bendable at the boundary between the flap and the element, an insulating member being formed on at least one face of the flap; and a housing including opposite side portions respectively defining a pair of terminal receiving portions for respectively receiving the pair of terminals, and a central portion defining an element receiving portion for receiving the element, the element receiving portion having an open portion at its upper side. When the flap is bent, that face of the flap having the insulating member formed thereon is exposed to the exterior.Type: GrantFiled: October 18, 1996Date of Patent: October 21, 1997Assignee: Yazaki CorporationInventor: Naoki Matsuoka
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Patent number: 5680088Abstract: A disconnection mechanism for a dark current fuse provides a connecting terminal connecting the dark current fuse, a fuse block body receiving the connecting terminal, and a fuse holder slidably engaged with the fuse block body in a direction of connecting the dark current fuse, the fuse holder provides a cutaway opening exposing a head of the dark current fuse being therein, an engaging projection disposed at an opening edge of the cutaway opening for engaging the head, and a supporting wall portion contacting a trunk of the dark current fuse. The disconnection mechanism is not necessary to store the extracted dark current fuse after a dark current fuse circuit is opened, so that there arises no possibility of missing the extracted dark current fuse, the dark current fuse can be extracted by using a puller, and the dark current fuse is surely held with being prevented from slipping off.Type: GrantFiled: August 31, 1995Date of Patent: October 21, 1997Assignee: Yazaki CorporationInventors: Yoshinobu Seki, Kenichiro Kawaguchi, Gen Oozono, Akio Sugiyama, Ryuetsu Oikawa
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Patent number: 5668522Abstract: A slowly-breaking fuse includes a housing made of a synthetic resin, a fuse element including a pair of terminal members for an electrical connection, and a melting member mounted between the terminal members, the melting member being smaller in thickness than the terminal member, the melting member having a narrow elongated central portion and a pair of base portions between which the narrow elongated central portion is mounted, and a cross-sectional area increased member provided at an opposite end of the melting member.Type: GrantFiled: October 27, 1994Date of Patent: September 16, 1997Assignee: Yazaki CorporationInventors: Hiroki Kondo, Mitsuhiko Totsuka, Toshiharu Kudo, Hisashi Hanazaki
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Patent number: 5637017Abstract: An electrical plug includes a base body having a front surface on which two blade slots are formed to receive therein conductive blades with the blades partially projecting out of the slots from a top end of the base body. Each of the conductive blades has a sharpened member in electrical connection therewith, wherein one of the conductive blades has a fuse connected between the blade and the sharpened member. A casing is fit over the base body to enclose and retain the blades, together with the sharpened members therein. An end portion of an electrical wire is received within the casing through an opening. The end portion of the wire is guided to run from the front surface of the base body to an opposite rear surface and then back to the front surface through two through holes formed on the base body. The base body further has a central slots formed between the two blade slots to receive the sharpened members therein.Type: GrantFiled: June 19, 1995Date of Patent: June 10, 1997Inventor: Chao-Chih Hsu
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Patent number: 5631619Abstract: A female fuse having a one piece fuse link and thermal mass injection molded around a multifinger fuse clips. The fuse link, thermal mass, and fuse clip are enclosed in an insulating housing. The resulting fuse is smaller in size and operates at a cooler temperature than other fuses.Type: GrantFiled: March 20, 1995Date of Patent: May 20, 1997Assignee: Cooper Industries, Inc.Inventor: Terence J. Evans
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Patent number: 5629663Abstract: A disconnection mechanism for a dark current fuse provides a connecting terminal connecting the dark current fuse, a fuse block body receiving the connecting terminal, and a fuse holder slidably engaged with the fuse block body in a direction of connecting the dark current fuse, the fuse holder provides a cutaway opening exposing a head of the dark current fuse being therein, an engaging projection disposed at an opening edge of the cutaway opening for engaging the head, and a supporting wall portion contacting a trunk of the dark current fuse. The disconnection mechanism is not necessary to store the extracted dark current fuse after a dark current fuse circuit is opened, so that there arises no possibility of missing the extracted dark current fuse, the dark current fuse can be extracted by using a puller, and the dark current fuse is surely held and prevented from slipping off.Type: GrantFiled: August 31, 1995Date of Patent: May 13, 1997Assignee: Yazaki CorporationInventors: Yoshinobu Seki, Kenichiro Kawaguchi, Gen Oozono, Akio Sugiyama, Ryuetsu Oikawa
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Patent number: 5629664Abstract: Bifurcated gripping pieces, each having a clearance in a thickness direction of a terminal, are projected from inner edge portions of respective terminals so as to confront each other. An inserting opening of an inserting space is made on a lower surface of a housing. Closing plates interposed between a pair of slits extending in a terminal inserting direction from the inserting opening are arranged on both lateral walls of the housing. The pair of closing plates are gripped between the respective gripping pieces while inserted into the clearances of the respective gripping pieces with the terminals inserted into the inserting space.Type: GrantFiled: September 21, 1995Date of Patent: May 13, 1997Assignee: Yazaki CorporationInventors: Kenji Muramatsu, Toshiharu Kudo
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Patent number: 5608372Abstract: A fuse locking construction for a fuse box, in which a fuse having a fuse member insert molded in a base made of synthetic resin and a pair of terminal plates projecting out of the base from the fuse member is inserted into a fuse mounting portion so as to be locked to the fuse mounting portion. The fuse locking construction includes a pair of locking projections which are, respectively, provided at opposite ends of an insertion mouth of the fuse box for the fuse mounting portion and retain opposite upper ends of the base at the time of completion of insertion of the fuse into the fuse mounting portion so as to lock the fuse to the fuse mounting portion; and a guide groove for guiding each of the terminal plates of the fuse in a direction for inserting the fuse into the fuse mounting portion or drawing the fuse out of the fuse mounting portion, which is formed on each of the locking projections.Type: GrantFiled: December 21, 1995Date of Patent: March 4, 1997Assignee: Sumitomo Wiring Systems, Ltd.Inventor: Jun Yamaguchi