Source: http://www.google.com/patents/US7633726?dq=5319712
Timestamp: 2015-01-31 23:50:02
Document Index: 392108302

Matched Legal Cases: ['Application No. 60', 'art 30', 'art 30', 'art 30', 'art 30', 'art 30', 'art 30', 'art 30']

Patent US7633726 - Ground fault circuit interrupters with miswiring or reverse wiring ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThis invention provides protection against an electricity leak and prevents error in reverse wiring. Also, when the ground fault circuit interrupter has come to the end of its life and its functions fail, it can set off an alarm prompt signal, reminding the user to replace the interrupter in a prompt...http://www.google.com/patents/US7633726?utm_source=gb-gplus-sharePatent US7633726 - Ground fault circuit interrupters with miswiring or reverse wiring protection and end of life alarm signalAdvanced Patent SearchPublication numberUS7633726 B2Publication typeGrantApplication numberUS 11/362,040Publication dateDec 15, 2009Filing dateFeb 27, 2006Priority dateFeb 25, 2005Fee statusPaidAlso published asUS20060279886Publication number11362040, 362040, US 7633726 B2, US 7633726B2, US-B2-7633726, US7633726 B2, US7633726B2InventorsHuadao Huang, Huayang LuOriginal AssigneeHuadao Huang, Huayang LuExport CitationBiBTeX, EndNote, RefManPatent Citations (30), Referenced by (8), Classifications (12), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetGround fault circuit interrupters with miswiring or reverse wiring protection and end of life alarm signalUS 7633726 B2Abstract This invention provides protection against an electricity leak and prevents error in reverse wiring. Also, when the ground fault circuit interrupter has come to the end of its life and its functions fail, it can set off an alarm prompt signal, reminding the user to replace the interrupter in a prompt manner; when a certain part or accessory of the ground fault circuit interrupter fails, especially when the primary electromagnetic coil cannot work in a normal manner, the power output of the interrupter may be cut off through the secondary electromagnetic coil; or the test button may be pressed to mechanically cut off the power output of the interrupter. This invention has powerful applications, with good safe guard and is safe to use, thus effectively ensuring the personal safety of the user as well as the safety of the appliances.
RELATED APPLICATION The present invention claims the priority of U.S. Provisional Application No. 60/656,090, filed on Feb. 25, 2005, which is herein incorporated by reference.
TECHNICAL FIELD This invention is related to an electromagnetic ground fault circuit interrupter that can provide protection against any leaked electric current. In particular, it refers to an electromagnetic ground fault circuit interrupter with the feature of being capable of preventing wiring errors, providing alarm prompts and also providing forcible and mechanical release or disengagement.
BACKGROUND With constant development of the ground fault circuit interrupter industry, people have an increasingly high demand for the usage safety of ground fault circuit interrupters, desiring that during the use of a ground fault circuit interrupter, when the interrupter comes to the end of its life and it has already lost its protective functions or its parts and accessories fail and do not work, the user can be reminded in a prompt manner to replace it with a new product. However, currently in the market, no ground fault circuit interrupter has been seen with the capacity to issue an alarm or prompt signal.
SUMMARY OF THE INVENTION In view of the above, the primary purpose of this invention is to provide a new type of more reliable electromagnetic ground fault circuit interrupter capable of preventing wiring errors, with a more rational design and structure.
Below the release, a movable fastener part shaped as an inverted letter �L,� made of a metal material, threads through the release. On top of the fastener part, there is also a perforation.
Below the test button, inside the housing described, on the lower part of the test metal sheet, there is a sliding sheet shaped as an inverted letter �L.� The lower tip of the sliding sheet is pointed, and its lower tip threads through the mid-level support and comes into contact with the upper tip of the release lever described.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded view illustrating the structure of an embodiment of this invention.
EMBODIMENTS AND DETAILED DESCRIPTION OF THE INVENTION This invention discloses an enhanced, multifunctional electromagnetic ground fault circuit interrupter, for which functions for preventing wiring errors have been added by reference to Chinese patent applications number 00250313.1 and 0122689.4. When an installer erroneously connects the live power line and null power line inside a wall with the power output end of an interrupter and connects the power line of a home appliance with the input end of an interrupter, no matter how the reset button is pressed, there is no power output for this invention; this invention has also added a function to remind the user to replace the product in a prompt manner through lighting and sound alarms when the ground fault circuit interrupter fails and has come to the end of its life; this invention has also added a function whereby the user can cut off the power output of the interrupter through the secondary electromagnetic coil when a part or accessory inside the ground fault circuit interrupter, such as electromagnetic coil 26, fails; this invention has also added a function whereby the user can cut off the power output by forcible mechanical means, when a part or accessory inside the ground fault circuit interrupter, such as electromagnetic coil 26 and the secondary electromagnetic coil, fails.
On top of release 28, there is a vertical, central perforation 29. reset guide column 35, which is embedded into at the bottom of reset button 8 and in which reset spring 91 is a slid, can move up and down along central perforation 29. In the lower part of reset guide column 35 and near its bottom, a circle of concave lock groove 36 is opened. In the lower part of release 28, a movable fastener part 30 shaped like an inverted letter �L� made of metal materials, threads through release 28. On top of fastener part 30, there is a perforation 31. Between the side wall of release 28 and the inside of fastener part 30, there is a circular groove 33, in which there is a fastener spring 34. Hole 32 is placed at one end of fastener part 30. Inside hole 32, there is a release lever 37. This release lever 37 can revolve on pivot point 28-A on the side wall of release 28.
Without the need to operate any button, control chip IC2 (model number WL20050201smbh) on control circuit board 18 of this invention can automatically detect whether the ground fault circuit interrupter has come to the end of its life at predetermined times and whether it still is capable of �detecting electricity leaks linked to earth and test control output.� Its signal detect grounding electricity leak failures is sent out by pin 10 and pin 11 of control chip IC2, and is added to the magnetic loop of grounding leak electric current detection induction coils L1 and L2 through coil L3. As long as L1 and L2 have not become inoperative, the electric current signal that simulates a failure will surely be capable of sensing it and send this signal to the electric leak failure signal amplification and control chip IC1 through capacitors C1 and C3 (the input end of model number RV4145 or LM1851, to be compared inside IC1. When the electric current intensity of the simulated failure reaches the range specified by UL standards (4�6 mA), IC1 outputs a �release pulse signal�). This �release pulse signal� is fed to pin 6 of control chip IC2 within an extremely short mS grade timeframe. Thus, when control chip IC2 conforms that all functions for the ground fault circuit interrupter are normal, its pin 1 outputs a low level and causes green indicator light G to emit light, indicating that all is normal with the ground fault circuit interrupter; by contrast, pin 1 of control chip IC2 outputs a high level and causes green indicator light not to emit light and prohibits the release apparatus from acting and resetting. When confirming that all functions of the ground fault circuit interrupter are normal, and when control chip IC2 causes green indicator light to emit light, if a leaked electric current is detected on the power supply loop, i.e., chip IC1 detects the leaked electric current and outputs to pin 6 of control chip IC2. Pin 5 of the control chip outputs a control signal which causes silicon controlled SCR1 to turn on. Coil 26 is energized and causes the release apparatus to act and trip, thus cutting off the power supply of the interrupter. At the same time, pin 1 of IC2 becomes a high level and causes green light G to go out.
To prevent the occurrence of any failure of the control circuit as shown in FIG. 8 or to prevent the inability to cut off power output from the interrupter during a failure of primary and secondary electromagnetic coils 26 and 39, as shown in FIG. 1, FIG. 5-2B and FIG. 5-5, this invention has also added a sliding sheet shaped like an inverted letter �L� between metal grounding support 1 and mid-level 3, under test button 7. The lower end of sliding sheet 65 is pointed, and its lower end threads through mid-level support 3 to come into contact with the upper end of release lever 37. A spring 66 is placed between sliding sheet 65 and mid-level support 3. When the control circuit of the interrupter fails or both the primary and secondary electromagnetic coils fail, making it impossible to cut off the power output of the interrupter, one may forcibly press down hard on test button 7, so that sliding sheet 65 under test button 7 moves downward and pushes release lever 37 to pull fastener part 30, 50 that fastener part 30 moves and causes reset guide column 35 to jump out of fastener part 30. Release 28 drops down, two pairs of flexible power input metal sheets, 50, 51, 20 and 21, drop down, disengaging their moving contacts from fixed contacts 13 and 14 on power output conductors 13 and 14, thus causing flexible power output conductors 13 and 14 and power output ends 80 and 81 not to be energized. Neither power output conductors 13 and 14 nor power output ends 80 and 81 not to be energized and cutting off power output to the interrupter.
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Inc.Circuit interrupting device with reverse wiring protectionUS6963260Jan 15, 2004Nov 8, 2005Leviton Manufacturing Co., Inc.GFCI receptacle having blocking meansUS7019952Feb 20, 2003Mar 28, 2006Shanghai Meihao Electric Inc.Receptacle device having circuit interrupting and reverse wiring protectionUS7049910Mar 20, 2001May 23, 2006Leviton Manufacturing Co., Inc.Circuit interrupting device with reset lockout and reverse wiring protection and method of manufactureUS7049911Oct 22, 2003May 23, 2006Leviton Manufacturing Co., Inc.Circuit interrupting device and system utilizing electromechanical resetUS7253629 *Jan 30, 2004Aug 7, 2007Pass & Seymour, Inc.Circuit protection device with grounded neutral half cycle self testUS20040027740 *Feb 20, 2003Feb 12, 2004Huadao HuangReceptacle device having circuit interrupting and reverse wiring protection* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS8297990 *Jul 31, 2011Oct 30, 2012Huadao HuangLeakage protection outletUS8382497 *Sep 30, 2011Feb 26, 2013Huadao HuangPower outlet with shield locking mechanismUS8384502 *May 15, 2010Feb 26, 2013Zhejiang Trimone Electric Science & Technology Co. Ltd.Circuit breakerUS8550829Dec 8, 2011Oct 8, 2013Huadao HuangPower outlet with jack safety shield deviceUS8830015Mar 16, 2012Sep 9, 2014Hubbell IncorporatedCompact latching mechanism for switched electrical deviceUS20110011714 *May 15, 2010Jan 20, 2011Zhejiang Trimone Electric Science & Technology Co. Ltd.Circuit BreakerUS20120083142 *Sep 30, 2011Apr 5, 2012Huadao HuangPower Outlet with Shield Locking MechanismUS20130171847 *Feb 21, 2013Jul 4, 2013Huadao HuangLeakage protection socket with integrated baffle locking mechanism* Cited by examinerClassifications U.S. Classification361/42International ClassificationH02H3/00Cooperative ClassificationH01H2071/044, H01R13/7135, H01R13/64, H01R13/652, H01R24/78, H01R13/6691, H01H83/04, H01R2103/00European ClassificationH01R13/713G, H01H83/04Legal EventsDateCodeEventDescriptionJun 20, 2013SULPSurcharge for late paymentJun 20, 2013FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services