|Publication number||USRE36225 E|
|Application number||US 08/504,601|
|Publication date||Jun 8, 1999|
|Filing date||Jul 20, 1995|
|Priority date||Feb 10, 1992|
|Also published as||US5229703|
|Publication number||08504601, 504601, US RE36225 E, US RE36225E, US-E-RE36225, USRE36225 E, USRE36225E|
|Inventors||Timothy S. Harris|
|Original Assignee||Mattel, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (13), Referenced by (15), Classifications (15), Legal Events (2)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The invention relates generally to a recharging system for devices such as a child's ride-on vehicle powered by a rechargeable battery, and more specifically to a recharger receptacle used in a battery recharge interconnection system which protects the battery and prevents operation of the battery-powered vehicle or other device while the battery is being recharged.
Battery powered vehicles such as children's ride-on cars or other toy vehicles usually receive power from one or more rechargeable batteries carried on the vehicle. In a typical electrical system used in some models of toy ridable vehicles, the vehicle battery is coupled to a connector plug which is mated with a cooperating connector on the wiring harness of the vehicle. Power to operate the vehicle is supplied through the wiring harness connector. To recharge the battery, the two halves of the connector are separated and the part connected to the battery is inserted into a cooperating connector on an external recharger, which supplies recharging current to the battery. When a recharging cycle is completed, the cooperating connector on the charger is separated from the battery connector plug and reconnected to the cooperating plug on the wiring harness. Since the wiring harness must be disconnected before the battery can be recharged, this prior art system has the advantage of eliminating the possibility of operating the vehicle during a recharging cycle. That is an important safety feature because it avoids the possibility of a child climbing on and operating the vehicle while it is recharging, which might entangle the child in external wires or damage the charger, the battery, or the vehicle.
The problem with the prior art charging system described above is that it requires the separation and reconnection of the two halves of the battery connector a minimum of three times for a single charging cycle. It would be far more convenient to provide a plug-type receptacle on the vehicle which is permanently connected to the battery terminals and into which a battery recharger could be plugged to recharge the battery. The risk with such a system is that a child may attempt to operate the vehicle while it is recharging.
Rechargeable batteries are recharged by feeding a charging current through the battery terminals. Excessive charging current can overheat and damage the battery and may present a leakage or rupture hazard. It can also damage the external recharger, its cord and the internal vehicle wiring. Excessive charging current can result from numerous causes, including shorts in the recharger cord, or shorts caused by foreign objects such as pins or paper clips which can lodge across the battery or charger terminals. On rechargeable toys such as children's ridable vehicles, it is particularly important that hazards resulting from excessive recharging current be eliminated. It would therefore be advantageous if some type of protective system is provided for limiting the recharger current supplied to the rechargeable battery on a toy ridable vehicle.
It would be advantageous to have a battery recharge interconnection system for use in toy riding vehicles, or in other battery-operated load devices powered by rechargeable batteries, which incorporates a receptacle assembly that is capable of disabling the vehicle or can otherwise protect against improper use of the battery-operated device during a recharging cycle.
It would be a further advantage If such a battery recharge interconnection system included a cut-out switch operatively connected to the electrical circuitry of the load device for interrupting the supply of power from the battery to the device whenever the battery is recharged.
It would be also be advantageous to have a battery recharge interconnection system which both disables the operation of the battery-operated device during recharging and which helps prevent dust, dirt and other foreign matter from entering the recharge receptacle.
Finally, it would be advantageous to have a battery recharge interconnection system which protects against excessive current to the battery by means of a current-limiting fuse that is simple and inexpensive to replace.
Accordingly, the present invention provides a battery recharge interconnection system for an electric vehicle, or for use in the electrical circuitry of another type of load device powered by a rechargeable battery. The interconnection system for an electric vehicle comprises a cut-out switch operatively connected to the vehicle wiring for rendering the vehicle inoperable when the cut-out switch is engaged and for permitting operation of the vehicle when the cut-out switch is disengaged. A charger receptacle is provided which is operatively connected to the rechargeable battery of the vehicle for mating with an external recharger to recharge the battery. Finally, an interlock is provided between the charger receptacle and the cut-out switch, in the form of an obstruction for the charger receptacle. The interlock operates to reposition the cut-out switch whenever the obstruction is moved, either to block or unblock the charger receptacle. Specifically, the obstruction is movable between a first position, in which the cut-out switch is disengaged and the obstruction prevents an external charger from mating with the receptacle, and a second position in which the cut-out switch is engaged and the obstruction is removed from blocking the charger receptacle. When the obstruction is in its second position, an external charger can be mated with the charger receptacle. Thus, whenever the battery is recharged the cut-out switch renders the vehicle inoperable.
In the embodiment of the invention used in the electrical circuitry of a load device powered by a rechargeable battery, the interconnection system comprises a cut-out switch operatively connected to the electrical circuitry for interrupting the power to the load device from the rechargeable battery. The system provides an obstruction for selectively blocking the charger receptacle. The obstruction is operatively connected to a cut-out switch for the device and is mounted for movement relative to the charger receptacle between first and second positions. In the first position, the cover prevents an external charger from mating with the receptacle and also disengages the cut-out switch. In the second position, the cover is removed from the charger receptacle, allowing an external charger to be mated with the receptacle, and it engages the cut-out switch. Whenever the cover is in its second position, the load device is inoperable and the battery can be recharged.
At the heart of the battery recharge interconnection system is a receptacle and actuator assembly for permitting electrical interconnections to be selectively made when the actuator portion of the assembly is moved to a predetermined position. The receptacle and actuator assembly comprises an electrical receptacle having an opening into which a plug is insertable to complete one or more electrical interconnections. When used with a battery recharge interconnection system, the charger receptacle is operatively connected to the electrical circuitry which supplies recharging current to a battery. A rotatable obstruction is pivotally mounted adjacent the receptacle for movement between a first position, in which the obstruction blocks the opening of the receptacle to prevent insertion of a plug into the receptacle, and a second position, in which the obstruction is rotated out of its blocking position. When the rotatable obstruction is in its second position, it permits insertion of a plug into the receptacle. An actuator is operatively coupled to the rotatable obstruction for operating a device separate from the electrical receptacle. The actuator is movable between first and second states in response to rotational movement of the obstruction between its respective first and second positions. A plug is insertable in the receptacle only when the actuator is moved to its second state. In the battery recharge interconnection system of the present invention, the actuator is operatively coupled to the cut-out switch and engages the cut-out switch when in its second state.
Finally, in the preferred embodiment of the invention, a current-limiting fuse is installed in the circuitry between the charger receptacle and the battery to prevent excessive charging current from damaging the battery, the external battery charger or the battery charger cord.
FIG. 1 is a partial, schematic, perspective view of a child's ridable vehicle shown in phantom, with the major parts of the wiring harness, incorporating the battery recharge interconnection system of the present invention, shown with solid lines.
FIG. 2 is a partially schematic circuit diagram showing the major elements of the vehicle wiring harness of FIG. 1 and also showing the battery recharge interconnection system of the present invention.
FIG. 3 is a partial perspective view, partially exploded, showing the receptacle assembly of the present invention as used in the battery recharge interconnection system of FIGS. 1 and 2.
FIG. 4 is a top plan view, partially in phantom, illustrating the various parts of the receptacle assembly shown in FIG. 3.
FIGS. 5A and 5B are side plan views, partially in cross-section, taken along lines 5A--5A of FIG. 4, on an enlarged scale, illustrating how the actuator arm of the receptacle assembly of FIGS. and 4 repositions the cut-out switch. FIG. 5A shows the cut-out switch in its disengaged position and FIG. 5B shows the cut-out switch in its engaged position.
Referring to FIG. 1, a child's ridable toy vehicle 10 is shown in phantom. Certain parts of vehicle 10, such as the seats, trunk lid and battery enclosure housing, have been deleted from the phantom image to more clearly show the key parts of the vehicle wiring harness 12. Wiring harness 12 includes the principal electrical devices in the drive train or drive system used to power and drive vehicle 10. The vehicle shown in FIG. 1 is a toy version of a rear-engine car, such as a Porsche. Like the real car, vehicle 10 has its power unit, in the form of rechargeable battery 14, located in the rear compartment 16 of the vehicle. Typically, in a completely assembled version of vehicle 10, battery 14 will be covered by a housing which resembles or simulates an automotive engine.
Battery 14 is preferably an 18-volt, solid gel rechargeable battery. The negative and positive terminals 18, 20, respectively of battery 14 are operatively connected by electrical wires to the various electrical components of wiring harness 12. Battery terminals 18, 20 are also connected to a recharge interconnector 22 on the vehicle for recharging the battery. Interconnector 22 is at the heart of the battery recharge interconnection system of the present invention and is described in detail below.
The wires in wiring harness 12 include a negative battery line 24, operatively connecting battery terminal 18 with recharge interconnector 22. A negative wiring harness lead 26 extends from interconnector 22 to the other parts of the wiring harness. A positive wiring harness lead 30 operatively connects positive battery terminal 20 with the other parts of wiring harness 12. Electrical system 12 also include drive motors 32, 34, a forward-reverse switch 40, and an on-off switch 48. The forward-reverse switch 40 is preferably mounted near the driving position of the vehicle, in the form of a simulated shift lever 39 which is moved in the direction of arrows 41, 42 (FIG. 2) to select forward and reverse operation. On-off switch 48 is preferably mounted on the floor and is covered by a simulated gas pedal 50 which is depressed by the driver's foot to energize drive motors 32, 34. Numerous other devices (not shown) may also be operatively connected to the wiring harness of the vehicle, including a horn, headlights, a speed selector or controller and other accessories. The vehicle illustrated in the figures includes only the basic elements necessary to fully describe the battery recharge interconnection system of the present invention.
Forward-reverse switch 40 is a conventional double-pole double-throw switch wired to offer selective reverse polarity. It is illustrated schematically and pictorially in FIG. 2. Battery voltage, supplied at a fixed polarity, is applied to common parallel terminals 43, 44 on switch 40 via negative and positive wiring harness leads 26, 30, respectively. When the double-pole switch engages the forward terminals connected to switch output lines 45, 46, the polarity of the output lines will be the same as on wiring harness leads 26, 30. When switch 40 is placed in the reverse position, engaging terminals 47, 48, switch 40 reverses the battery polarity on output lines 45, 46.
The principal load devices on vehicle 10 are motors 32, 34, which are conventional direct-current motors wired in parallel and energized by battery 10 through forward-reverse switch 40 and switch 48. Switch 48 is an on-off switch which is "on" when input terminal 49 is electrically connected to middle terminal 55 on the switch, which occurs whenever pedal 50 is depressed. Switch 48 is preferably a double-pole switch which can also be used to make a connection with a brake resistor 57 (shown in phantom in FIG. 2). Whenever gas pedal 50 is released by the driver, an internal spring in switch 48 opens the connection between terminals 49 and 55 and closes the connection between terminals 55 and 56. If a brake resistor 57 is provided, the voltage across motors 32, 34 is shunted through the brake resistor which dissipates energy generated by the motors and rapidly slows the vehicle to a stop. The wiring configuration shown in FIG. 2 provides for only a single speed of operation in which motors 32, 34 are selectively supplied with full battery voltage, or supplied with zero voltage. An alternative motor wiring configuration which allows for two-speed operation of vehicle 10 is shown in FIG. 2 of co-pending patent application Ser. No. 07/833,980, filed Feb. 10, 1992, entitled ELECTRIC DRIVE SYSTEM FOR A CHILD'S RIDABLE VEHICLE, invented by Timothy S. Harris, the disclosure of which is incorporated herein by reference. The battery recharge interconnection system of the present invention can be used with the single-speed or two-speed motor wiring configuration, or with another motor wiring configuration.
At the heart of the battery recharge interconnection system of the present invention is a receptacle and actuator assembly 22, shown in detail in FIGS. 2-4. Assembly 22 includes a female battery charger plug receptacle 60 having a orifice 61 into which a cooperating male battery charger plug 62 is inserted to complete one or more electrical interconnections. Charger plug 62 is connected to an external charger 64 by charger cord 63. FIG. 2 depicts receptacle 60 schematically, in cross section. Receptacle 60 has an outer sleeve portion 66 interconnected with the positive terminal 20 of battery 14 by a first recharger current supply line 68. An axial pin disposed centrally within sleeve 66 forms the other terminal 70 of charger receptacle 60. Central pin 70 is connected to the opposite terminal of battery 14 via a second recharger current supply line 72, which communicates with negative battery connector line 24.
A male battery charger plug 62, designed to mate with receptacle 60, is shown in FIG. 3. Plug 62 is insertable into receptacle 60 along an insertion axis 78. The insertion axis of receptacle 60 extends through the center of receptacle orifice 61. Plug 62 includes an outer sleeve 74 (see FIG. 3) for engaging outer sleeve 66 of receptacle 60, and a inner sleeve 76 for encircling and mating with pin 70. The external charger unit 64 (FIG. 2) is designed to be energized by a household current and includes a transformer to supply the necessary current to recharge battery 14 by conventional recharging processes well known to those skilled in the art.
Charger receptacle 60 is mounted on a mounting plate 80 designed to support the various parts of the receptacle and actuator assembly of the present invention. Mounting plate 80, also referred to as a mounting frame or mounting body, is designed to be mounted on the wall of the trunk compartment 16 of vehicle 10. Mounting plate 80 is made of molded plastic and includes one or more snap hooks 81 and engaging flanges 83 at suitable locations along its periphery to facilitate mounting.
Another part of assembly 22 is a cut-out switch 82 mounted on mounting plate 80. Cut-out switch 82 is a conventional see-saw switch which is pivotable between two positions to selectively open or close a circuit. Cut-out switch 82 is illustrated schematically in FIG. 2, below the charger receptacle, and in perspective in FIG. 3. It is electrically interconnected between the negative terminal 18 of battery 14 (via negative battery connector line 24) and negative wiring harness lead 26. The purpose of cutout switch 82 is to disable the vehicle, rendering it inoperable whenever the battery is being recharged. In FIG. 2, cut-out switch 82 is depicted in its engaged position, in which the switch is open, meaning the "cut-out" is engaged. In its disengaged position, switch 82 is closed, meaning there is no "cut-out" in the circuit. Whenever switch 82 is engaged (i.e., open), vehicle 10 is inoperable.
A pivotally-mounted circular disc 90 is mounted on plate 80 and serves as an obstruction for selectively blocking charger receptacle 60. Disc 90 is mounted for rotation about a pivot axis 91, the pivot axis being generally parallel with the insertion axis 78 of receptacle 60. The disc is preferably made of molded plastic and is rotatable about a central pivot axis 9 (see FIG. 3). The disc has a sufficient radius to extend over both charger receptacle 60 and cut-out switch 82. An opening or aperture 94 extends through disc 90. Opening 94 is positioned on disc 90 so it can be moved into registration with the insertion axis 78 of charger receptacle 60. In other words, the center of aperture 94 and the insertion axis 78 of receptacle 60 are spaced the same distance from the rotational axis 91 of the disc. Consequently, disc 90 can be rotated about axis 91 until opening 94, which moves with disc 90, is positioned directly over charger receptacle 60. Opening 94 is large enough for the male charger plug 62 from external charger 64 to be extended or inserted through the opening into receptacle 60.
A raised central support post 92 extends outwardly from the face of mounting plate 80. A retaining screw 93, extends through a central opening 96 in the center of the disc. Screw 93 and a washer 95 hold the disc on post 92 in a manner which allows for rotation of the disc about pivot axis 91. When disc 90 is mounted on post 92, it is movable across or over receptacle 60 in a direction transverse to and intersecting with insertion axis 78 of the receptacle. Several elements limit or control the rotational movement of disc 90 about its pivotal axis. A pair of movement-limiting posts 101, 102 extend outwardly from the face of mounting plate 80 toward disc 90. Posts 101, 102 are somewhat shorter than pivot support post 92 and are designed to extend toward the underside 103 of disc 90. A tang 106 formed on or attached to the underside 103 of disc 90 is positioned on the disc to strike posts 101, 102 to stop its rotation at selected orientations.
With disc 90 mounted on post 92 and with tang 106 positioned between posts 101 and 102, the disc can be rotated over a limited angular range indicated at 100 in FIG. 2. The limit of counterclockwise rotational movement for disc 90, in direction 107 (see FIGS. 2 and 4), occurs when tang 106 strikes post 102. That position is called the first position 104 of the disc. The limit of clockwise rotational movement for disc 90, in direction 108, occurs when tang 106 strikes post 101. That position is called the second position 105 of the disc. In its first position, disc opening 94 is offset from charger receptacle 60. Consequently, disc surface 90 acts as an obstruction for the charger receptacle, preventing an external charger from mating with the receptacle. When disc 90 is in its second position, opening 94 is in registration or alignment with charger receptacle 60 and the obstruction is removed, allowing an external charger to mate with the charger receptacle through aperture 94.
Disc 90 also serves as an actuator which repositions cut-out switch 82, selectively engaging or disengaging the switch as the disc is rotated. That function is accomplished by means of an actuator arm 110 attached to the underside 103 of disc 90. Referring to FIGS. 3, 4, 5A and 5B, when the disc is assembled on mounting plate 82, actuator arm 110 is located immediately adjacent or overlying cut-out switch 82. The actuator arm 110 is a short, wedge-shaped extension of molded plastic or another material formed integrally with, or attached to, the underside of the disc. Arm 110 is long enough to touch and engage see-saw switch 82 and to move it from one position to the other as disc 90 rotates between its first and second positions, 104, 105, respectively.
FIGS. 5A and 5B illustrate, in enlarged cross-sectional views, the repositioning of cut-out switch 82 by actuator arm 110. In FIG. 5A, disc 90 is in its first position 104 (see FIG. 2), having been rotated in a counterclockwise direction 107 to the limit of its rotational travel. When disc 90 is in its first position, actuator arm 110 is in its first operational state, positioned over the right half of cut-out switch 82 (as viewed in FIGS. 5A is and 5B). When am 110 is in its first state, it depresses the right half of switch 82, disengaging the cut-out. In that position, cut-out switch 82 is electrically closed and lines 24 and 26 are connected to one another to supply battery power to motors 32, 34. Thought of in another way, the electrical connection posts 114, 115 at the base of cut-out switch 82, used for making electrical connections to the switch, are electrically coupled when switch 82 is in the position shown in FIG. 5A.
In FIG. 5B, disc 90 is in its second position 105, having been rotated in a clockwise direction 108 to the limit of its rotational travel. When disc 90 is in its second position 105, actuator arm 110 is in its second state, positioned over the left half of cut-out switch 82 (as viewed in FIG. 5B), which is the engaged position of the cut-out switch. In that position, terminals 114 and 115 are disconnected and cut-out switch 82 is open. When cut-out switch 82 opens, the power supply from battery 14 to the wiring harness 12 of vehicle 10 is broken. Only when actuator 110 is in its predetermined second state, shown in FIG. 5B, can charger plug 62 be inserted into receptacle 60 to make the necessary electrical interconnections for recharging battery 14.
Cut-out switch 82 is preferably biased toward the closed (or "disengaged") position shown in FIG. 5A. In other words, switch 82 has an internal spring which urges the left half of the rocker switch (as viewed in FIG. 5A) in the direction of arrow 111. When disc 90 is moved to first position 104, the switch automatically returns to the position shown in FIG. 5A. When disc 90 is rotated in clockwise direction 108, the leading edge 113 of actuating arm 110, which is angled and forms a ramp, engages the sloping face 116 on the left side of see-saw switch 82 and forces the left side of the switch downwardly. No ramp is required on the right side of actuating arm 110 because of the internal bias of switch 82.
To facilitate the rotation of disc 90, the outer periphery of the disc preferably includes a widened edge 120 which is wider than the thickness 122 of the disc itself (see FIGS. 3, 4, 5A and 5B). Suitable grip contours such as knurls are provided on the outside periphery of edge 120. Disc 90 has a diameter of approximately 21/2-inches, an overall thickness 122, in the region radially inward from peripheral edge 120, of less than 1/8-inch. The outer peripheral edge of disc 90 has a width 121 of approximately 1/2-inch (see FIG. 3). Disc 90 could alternatively be referred to as a knob which is grasped and turned to control the obstruction of charger receptacle 60 and to actuate cut-out switch 82.
Operation of the battery recharge interconnection system is simple and safe. Whenever the user desires to recharge battery 14, disc 90 is rotated from its operating or first position 104, in a clockwise direction 108, to second position 105. When in its second position, the opening 94 in disc 90 is aligned with charger receptacle 60, permitting a charger plug 62 from an external charger to be inserted through disc opening 94 into receptacle 60. Also, when disc 90 is in its second position, cut-out switch 82 is engaged and the battery is disconnected from the vehicle wiring harness. When a charging cycle has been completed, which generally requires a period of hours, charger plug 62 is removed from receptacle 60 and disc 90 is rotated in a counterclockwise direction 107, from second position 105 to first position 104. Once the disc is in its first position, opening 94 is offset from charger receptacle 60 and the disc blocks and obstructs receptacle orifice 61, preventing a charger plug from being inserted in the receptacle Also, the actuator arm 110 disengages cut-out switch 82, permitting operation of the vehicle.
The battery recharge interconnection system of the present invention includes an additional protective feature in the form of a fuse 140 in the charging circuit of battery 14 (see FIGS. 1 and 2). Fuse 140 is located in the positive side recharger current supply line 68, which connects charger receptacle 60 and interconnector 22 with battery terminal 20. Fuse 140 prevents excessive current flow in the circuit extending from the external charger to the battery. Preferably fuse 140 is a 5-amp fuse, which limits the charging current supplied to battery 14 via charger 64, charger cord 63, and plug 62 to 5-amps or less. Fuse 140 protects against several hazards which might arise in a child's toy electric vehicle. For example, if the recharger cord is accidentally shorted due to a kinking, pinching, or fraying, fuse 140 would blow before the battery, charger, or cord would be damaged. Alternatively, should a child inadvertently insert a bobby pin, paper clip or other conductive object into the charger receptacle, a short circuit would develop across the battery which would immediately blow fuse 140. Thus, the fuse protects the battery, the external charger and persons using the vehicle from the danger and damage caused by excessive current in the battery charging circuit. Prior art recharge protection systems often used diodes or other types of current-limiting devices. Such prior art current limiting devices are effective, but are not as inexpensive and simple to replace as a conventional fuse.
The battery recharge interconnection system of the present invention simplifies the recharging process by proving an easily-accessible charger receptacle permanently connected to the battery. There is no need to disconnect and reconnect connector plugs to recharge the battery. In order to use the charger receptacle, the user only needs to rotate the disc to the position which permits insertion of the charger plug into the receptacle 60. Positioning the disc for recharging automatically engages the cut-out switch, thereby eliminating the possibility of operating the vehicle during a recharging cycle. Disc 90 also serves as a cover for the charger receptacle opening, preventing dust and debris from entering the receptacle.
The system of the present invention, while depicted for use in a child's ridable vehicle, cap also be employed in electrical circuitry for any other type of load device powered by a rechargeable battery. Regardless of the type of load device, the battery recharge interconnection system of the present invention provides an automatic cut-out switch which interrupts the power to the load device whenever the user recharges the battery. The invention provides a unique receptacle and actuator assembly for recharging a battery, or for performing other useful electrical interconnections using a plug and receptacle. A rotatable obstruction selectively blocks or unblocks the receptacle, depending on the state of an operatively-coupled actuator. Unless disc 90 is removed from mounting plate 80, the interlock between cut-out switch 82 and access to charger receptacle 60 is assured. Screw 93 could be replaced by a permanent rivet or other suitable attachment to prevent disengagement of disc 90 from mounting plate 82, to ensure that the interlock is not tampered with.
The present invention is particularly adapted for use on rechargeable electric toy vehicles of the type ridden by children. In one such vehicle incorporating the present invention, an 18-volt battery supplies two drive motors which move the vehicle at a maximum speed of 8-miles-per-hour or less. Alternative types of vehicles with different power supplies may also employ the battery recharge interconnection system of the present invention.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3581480 *||Sep 30, 1969||Jun 1, 1971||Black & Decker Mfg Co||Multiple-function receptacle and interconnecting plugs therefor|
|US3898547 *||Apr 11, 1974||Aug 5, 1975||Westinghouse Electric Corp||Electric vehicle charger shut-off interlock system|
|US3904947 *||Aug 22, 1973||Sep 9, 1975||Roy E Crews||Vehicle mounted battery charging system for an electric motor vehicle|
|US3916280 *||Jan 9, 1975||Oct 28, 1975||Briggs & Stratton Corp||Battery charger with state-of-charge indicator|
|US4146825 *||Jul 16, 1975||Mar 27, 1979||Harhay Warren C||Electric battery powered vehicle|
|US4157123 *||Mar 6, 1978||Jun 5, 1979||Everest & Jennings, Inc.||Wheelchair electrical control circuit|
|US4217400 *||Aug 3, 1978||Aug 12, 1980||General Electric Company||Rechargeable electrochemical cell pack having overcurrent protection|
|US4520419 *||Aug 12, 1983||May 28, 1985||Robert Bosch Gmbh||Polarity and overload protective circuit for electric consumers|
|US4555451 *||Jan 29, 1985||Nov 26, 1985||Pines Of America, Inc.||Storage battery with built-in fuse|
|US4563626 *||Sep 13, 1984||Jan 7, 1986||Nikko Co., Ltd.||Rechargeable wireless-control toy|
|US4697133 *||May 20, 1986||Sep 29, 1987||Grigorios Pergandis||Rechargeable battery powered toy|
|US5085043 *||Jun 1, 1990||Feb 4, 1992||Black & Decker Inc.||Electro-mechanical interlock and module system for lawn mower or other electrical device|
|DE927702C *||May 13, 1951||May 16, 1955||Erich Rathmann||Selbsttaetiger Ladeschalter fuer Akkumulatorenbatterien mit einer die Nachladezeit vorausbestimmenden Schaltzeiteinrichtung und einer Schaltuhr mit elektromagnetisch gesteuertem Schnellruecklauf|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US6593721 *||Dec 20, 2001||Jul 15, 2003||Link Treasure Limited||Connection device for charging electric vehicles|
|US6771034||Feb 20, 2002||Aug 3, 2004||Mattel, Inc.||Children's ride-on vehicle with electronic speed control|
|US7568538||Jan 31, 2006||Aug 4, 2009||Mattel, Inc.||Children's ride-on vehicle charging assemblies with back feed protection|
|US7642747 *||Mar 23, 2007||Jan 5, 2010||Sanyo Electric Co., Ltd.||Battery pack capable of detecting tampering|
|US7794280 *||Mar 4, 2009||Sep 14, 2010||Gm Global Technology Operations, Inc.||Charge receptacle for plug-in electric vehicle|
|US8725330||Jan 28, 2011||May 13, 2014||Bryan Marc Failing||Increasing vehicle security|
|US8841881||Jan 28, 2011||Sep 23, 2014||Bryan Marc Failing||Energy transfer with vehicles|
|US9114719||May 12, 2014||Aug 25, 2015||Bryan Marc Failing||Increasing vehicle security|
|US9393878||Sep 23, 2014||Jul 19, 2016||Bryan Marc Failing||Energy transfer with vehicles|
|US20060170187 *||Jan 31, 2006||Aug 3, 2006||Drosendahl Steven R||Children's ride-on vehicle charging assemblies with back feed protection|
|US20070229026 *||Mar 23, 2007||Oct 4, 2007||Toru Morioka||Battery pack|
|US20100227505 *||Mar 4, 2009||Sep 9, 2010||Gm Global Technology Operations, Inc.||Charge receptacle for plug-in electric vehicle|
|US20130265006 *||Apr 5, 2013||Oct 10, 2013||Schaltbau Gmbh||Vehicle-side socket of a charging connector, in particular for industrial vehicles|
|US20130316768 *||Oct 26, 2011||Nov 28, 2013||Edilberto Acacio Da Silva||System for enabling unintentional direct or remote cellular telephone switch-off|
|WO2012106788A1 *||Oct 26, 2011||Aug 16, 2012||Da Silva Edilberto Acacio||System for enabling unintentional direct or remote cellular telephone switch-off|
|U.S. Classification||320/104, 320/113|
|Cooperative Classification||Y02T10/7072, B60L2200/20, B60L11/1824, Y02T10/7005, Y02T90/14, Y02T90/12, H02J7/0031, H02J7/0045, Y02T90/121|
|European Classification||B60L11/18L7, H02J7/00D1, H02J7/00E2|
|Jan 19, 2001||FPAY||Fee payment|
Year of fee payment: 8
|Jan 20, 2005||FPAY||Fee payment|
Year of fee payment: 12