Patents by Inventor Shou-Mean Fang
Shou-Mean Fang 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).
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Patent number: 7355504Abstract: An electrical device which comprises first and second laminar electrodes and a laminar PTC resistive element sandwiched between them, the device comprising (a) a main portion which comprises a main part of the first electrode, a main part of the second electrode, and a main part of the resistive element; and (b) a first connection leg which extends away from the main portion and which comprises a first leg part of the first electrode which is integral with the main part of the first electrode, and a first leg part of the resistive element which is integral with the main part of the resistive element. Such devices can be secured to circuit boards in a variety of ways, and to elastically deformed terminals. Preferably preferred devices contain two laminar electrodes, with a PTC element between them, and a cross-conductor which passes through the thickness of the device and contacts one only of the two electrodes.Type: GrantFiled: November 25, 2003Date of Patent: April 8, 2008Assignee: Tyco Electronics CorporationInventors: Gregory A. Graves, Michael Zhang, Daniel Chandler, Chi-Ming Chan, Shou-Mean Fang, Dennis Siden, Mark Thompson
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Patent number: 7053748Abstract: A composite circuit protection device includes a laminar insulating member and first and second laminar circuit protection devices.Type: GrantFiled: August 7, 2003Date of Patent: May 30, 2006Assignee: Tyco Electronics CorporationInventors: Justin Chiang, Shou-Mean Fang, William C. Beadling
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Publication number: 20040246092Abstract: An electrical device which comprises first and second laminar electrodes and a laminar PTC resistive element sandwiched between them, the device comprisingType: ApplicationFiled: November 25, 2003Publication date: December 9, 2004Inventors: Gregory A. Graves, Michael Mengruo Zhang, Daniel Chandler, Chi-Ming Chan, Shou-Mean Fang, Dennis Siden, Mark Thompson
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Publication number: 20040027230Abstract: A composite circuit protection device includes a laminar insulating member and first and second laminar circuit protection devices.Type: ApplicationFiled: August 7, 2003Publication date: February 12, 2004Inventors: Justin Chiang, Shou-Mean Fang, William C. Beadling
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Patent number: 6651315Abstract: An electrical device which comprises first and second laminar electrodes and a laminar PTC resistive element sandwiched between them, the device comprising: (a) a main portion which comprises a main part of the first electrode, a main part of the second electrode, and a main part of the resistive element; and (b) a first connection leg which extends away from the main portion and which comprises a first leg part of the first electrode which is integral with the main part of the first electrode, and a first leg part of the resistive element which is integral with the main part of the resistive element. Such devices can be secured to circuit boards in a variety of ways, and to elastically deformed terminals. Preferably preferred devices contain two laminar electrodes, with a PTC element between them, and a cross-conductor which passes through the thickness of the device and contacts one only of the two electrodes.Type: GrantFiled: October 27, 1998Date of Patent: November 25, 2003Assignee: Tyco Electronics CorporationInventors: Gregory A. Graves, Michael Mengruo Zhang, Daniel Chandler, Chi-Ming Chan, Shou-Mean Fang, Dennis Siden, Mark Thompson
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Patent number: 6606023Abstract: A composite circuit protection device includes a laminar insulating member and first and second laminar circuit protection devices.Type: GrantFiled: April 14, 1998Date of Patent: August 12, 2003Assignee: Tyco Electronics CorporationInventors: Justin Chiang, Shou-Mean Fang, William C. Beadling
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Patent number: 6538415Abstract: A temperature-sensing apparatus 11 which is placed in contact with a plurality of batteries, e.g. secondary batteries, connected in series. The temperature sensing apparatus can be connected to a power source 12 and a current measuring device 13 to detect increases in the temperature of the battery. Each temperature-sensing section in contact with individual secondary batteries comprises a PTC element and electrode sheets in contact with and sandwiching the PTC element on the top and bottom, the electrode sheets being in a staggered and overlapping relationship.Type: GrantFiled: April 7, 1999Date of Patent: March 25, 2003Inventors: Shou-Mean Fang, Takashi Hasunuma, Noriyuki Nagashima
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Publication number: 20020050914Abstract: A composite circuit protection device includes a laminar insulating member and first and second laminar circuit protection devices.Type: ApplicationFiled: April 14, 1998Publication date: May 2, 2002Inventors: JUSTIN CHIANG, SHOU-MEAN FANG, WILLIAM C. BEADLING
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Patent number: 6292088Abstract: Laminar electrical devices, in particular circuit protection devices, contain two laminar electrodes, with a PTC element between them, and a cross-conductor which passes through the thickness of the device and contacts one only of the two electrodes. This permits connection to both electrodes from the same side of the device. The device also includes layers of solder on the areas of the device through which connection is made, and separation and/or masking members which (a) reduce the danger of short circuits formed by solder flow during installation of the device and/or (b) provide a site for permanent marking of the device.Type: GrantFiled: July 6, 1999Date of Patent: September 18, 2001Assignee: TYCO Electronics CorporationInventors: Michael Zhang, Shou-Mean Fang
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Patent number: 5852397Abstract: A circuit protection device which comprises first and second laminar electrodes; a laminar PTC conductive polymer resistive element sandwiched between the electrodes; a third laminar conductive member which is secured to the same face of the PTC element as the second electrode but is separated therefrom; and an electrical connector which connects the third conductive member and the first electrode. This permits connection to both electrodes from the same side of the device, so that the device can be connected flat on a printed circuit board, with the first electrode on top, without any need for leads. The connector is preferably a cross-conductor which passes through an aperture in the PTC element, because this makes it possible to carry out the steps for preparing the devices on an assembly which corresponds to a number of individual devices, with division of the assembly as the final step.Type: GrantFiled: July 25, 1997Date of Patent: December 22, 1998Assignee: Raychem CorporationInventors: Chi-Ming Chan, Michael Zhang, Daniel Chandler, Shou-Mean Fang, Dennis Siden, Mark Thompson
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Patent number: 5831510Abstract: Laminar electrical devices, in particular circuit protection devices, contain two laminar electrodes, with a PTC element between them, and a cross-conductor which passes through the thickness of the device and contacts one only of the two electrodes. This permits connection to both electrodes from the same side of the device. The device also includes layers of solder on the areas of the device through which connection is made, and separation and/or masking members which (a) reduce the danger of short circuits formed by solder flow during installation of the device and/or (b) provide a site for permanent marking of the device.Type: GrantFiled: September 24, 1996Date of Patent: November 3, 1998Inventors: Michael Zhang, Shou-Mean Fang
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Patent number: 5537286Abstract: A method of making a planar polymeric circuit protection device arranges for the current between two electrodes (4, 6) to flow parallel to the surface of a sheet (2) of conductive polymeric material, rather than through its thickness. The resistance and tripping current levels of the device can be finely controlled and set at comparatively low levels.Type: GrantFiled: December 23, 1993Date of Patent: July 16, 1996Assignee: Raychem S.A.Inventors: Gilles R. Gozlan, Shou-Mean Fang
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Patent number: 5436609Abstract: An electrical device in which a conductive terminal is physically and electrically attached directly or indirectly to a face of a laminar PTC resistive element. The terminal comprises a laminar portion and a non-laminar shaped portion which lies within a projection of the periphery of the PTC resistive element. The shaped portion serves to improve thermal transfer between the PTC element and the atmosphere surrounding the device. Devices of the invention are useful as circuit protection devices.Type: GrantFiled: July 6, 1993Date of Patent: July 25, 1995Assignee: Raychem CorporationInventors: Chi-Ming Chan, Shou-Mean Fang
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Patent number: 5247277Abstract: An electrical device in which a first connection element is in electrical contact with a resistive element. The first connection element defines a cavity into which, when the cavity is empty, a second connection element can be inserted. The second connection element, which may be connected to a source of electrical power, is partially within the cavity, makes physical and electrical contact with the first connection element, and protrudes from the cavity. Such devices can be made in a continuous process by a method of the invention. They are particularly suitable for insertion into a circuit board.Type: GrantFiled: May 27, 1992Date of Patent: September 21, 1993Assignee: Raychem CorporationInventors: Shou-Mean Fang, Vijay K. Dhingra, Chi-Ming Chan, Daniel Chandler
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Patent number: 5166658Abstract: Circuit protection systems which comprise a PTC resistor and a second resistor, e.g. a thick film resistor, which is thermally and electrically connected to the PTC resistor have a break current I.sub.B and a hold current I.sub.H such that the ratio I.sub.B /I.sub.H is at most 20. Suitable PTC resistors are conductive polymer devices which comprise a PTC element which has been radiation crosslinked under conditions such that the average dose rate is at most 3.0 Mrad/minute or during which no part of the PTC element which is in contact with the electrodes reaches a temperature greater than (T.sub.m -60).degree.C., where T.sub.m is the melting point of the polymeric component of the conductive polymer.Type: GrantFiled: March 8, 1990Date of Patent: November 24, 1992Assignee: Raychem CorporationInventors: Shou-Mean Fang, David A. Horsma, Guillaume Peronnet, Charles H. Camphouse
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Patent number: 5148005Abstract: Circuit protection devices which comprise a PTC conductive polymer element and a second electrical component which is thermally coupled to the PTC element and which, when a fault causes the current in the circuit to become excessive, generates heat which is transferred to the PTC element, thus reducing the time taken to "trip" the PTC element. The second component is for example a voltage-dependent resistor which is connected in series with the PTC element under the fault conditions and is thus protected from damage. Alternatively, the second component is a thick film resistor which is connected in series with the PTC element.Type: GrantFiled: December 22, 1989Date of Patent: September 15, 1992Assignee: Raychem CorporationInventors: Shou-Mean Fang, David A. Horsma, Guillaume Peronnet, Timothy E. Fahey, Andrew N. Au, William D. Carlomagno
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Patent number: 5122775Abstract: An electrical device in which a first connection element is in electrical contact with a resistive element. The first connection element defines a cavity into which, when the cavity is empty, a second connection element can be inserted. The second connection element, which may be connected to a source of electrical power, is partially within the cavity, makes physical and electrical contact with the first connection element, and protrudes from the cavity. Such devices can be made in a continuous process by a method of the invention. They are particularly suitable for insertion into a circuit board.Type: GrantFiled: February 14, 1990Date of Patent: June 16, 1992Assignee: Raychem CorporationInventors: Shou-Mean Fang, Vijay K. Dhingra, Chi-Ming Chan, Daniel Chandler
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Patent number: 5089688Abstract: Circuit protection devices which comprise a PTC conductive polymer element and a second electrical component which is thermally coupled to the PTC element and which, when a fault causes the current in the circuit to become excessive, generates heat which is transferred to the PTC element, thus reducing the time taken to "trip" PTC element. The second component is for example a voltage-dependent resistor which is connected in series with the PTC element under the fault conditions and is thus protected from damage. Alternatively, the second component is a thick film resistor which is connected in series with the PTC element.Type: GrantFiled: December 22, 1989Date of Patent: February 18, 1992Assignee: Raychem CorporationInventors: Shou-Mean Fang, David A. Horsma, Guillaume Peronnet, Timothy E. Fahey, Andrew N. Au, William D. Carlomagno
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Patent number: 5089801Abstract: An electrical device in which a conductive terminal is physically and electrically attached to a laminar resistive element by means of a laminar conductive element. The three layers are positioned in such a way that the periphery of the conductive element does not extend beyond the first periphery and at least a part of the periphery of the conductive terminal lies within the first periphery. In a preferred embodiment the conductive element is solder and the periphery of the conductive terminal is shaped in such a way that no excess solder bridges from one laminar surface of the resistive element to the other. Devices of the invention are useful as circuit protection devices.Type: GrantFiled: September 28, 1990Date of Patent: February 18, 1992Assignee: Raychem CorporationInventors: Chi-Ming Chan, Shou-Mean Fang
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Patent number: 5064997Abstract: Circuit protection devices which comprise a PTC conductive polymer element and a second electrical component which is thermally coupled to the PTC element and which, when a fault causes the current in the circuit to become excessive, generates heat which is transferred to the PTC element, thus reducing the time taken to "trip" the PTC element. The second component is for example a voltate-dependent resistor which is connected in series with the PTC element under the fault conditions and is thus protected from damage. Alternatively, the second component is a thick film resistor which is connected in series with the PTC element.Type: GrantFiled: December 22, 1989Date of Patent: November 12, 1991Assignee: Raychem CorporationInventors: Shou-Mean Fang, David A. Horsma, Guillaume Peronnet, Timothy E. Fahey, Andrew N.S. Au, William D. Carlomagno