Marquardt GmbH Patent applications |
Patent application number | Title | Published |
20140152091 | ENERGY SUPPLY CIRCUIT FOR ELECTRIC COMPONENTS - The invention relates to an energy supply circuit of electric components, in particular for a motor vehicle, having an accumulator, wherein a discharge monitoring circuit monitors the energy stored in the accumulator. If the energy stored in the accumulator falls below a threshold value, the discharge monitoring circuit switches off the energy supply at least of individual components, in particular of all components. | 06-05-2014 |
20130161168 | SELF-LOCKING SWITCH - A self-locking switch including a button sub-assembly and a housing sub-assembly. The button sub-assembly includes at least one button with a tab extending from a lower surface at a first end and at least one shaft engagement point on the lower surface at a second end, and a bracket comprising a first end and a second end with a rotation shaft at the second end. The bracket is rotatably connected to the button. The housing sub-assembly includes a switch housing having engagement points, and a switching mechanism in the housing. The button sub-assembly and the housing sub-assembly are joined together by engaging the tab of the button and the first and second ends of the bracket to corresponding engagement points on the switch housing and the engagement points are not accessible from outside the self-locking switch after the button sub-assembly and the housing sub-assembly are assembled together. | 06-27-2013 |
20130048857 | OPERATING DEVICE - The invention relates to an operating device for a motor vehicle having a movable activation element for activating at least one switch element for generating a switch signal. The operating device comprises a sensor face which is arranged on the activation element and an optical reflection sensor device, which has at least one light emitting diode and at least one photodiode for optical radiation. A signal can be generated when the sensor face is approached and/or the sensor face is touched, in particular by means of a finger of a user. | 02-28-2013 |
20130043114 | ELECTRICAL SWITCH - An electrical switch having a contact system including at least one fixed contact and a switching contact. The switch has an actuating element for acting in switching fashion on the contact system and a switching slide which bears the switching contact and is moveable in a movement direction between two positions, wherein in one position the switching contact is remote from the fixed contact and in the other position the switching contact bears against the fixed contact. The switch has an actuating slide which is moveable by virtue of the actuating element and is coupled to the switching slide by an elastic element. The switch includes a latching mechanism which interacts with the switching slide, such that the switching slide can be switched over between the two positions on actuation of the actuating element with a type of snap-action movement. | 02-21-2013 |
20120056566 | ELECTRIC SWITCH - An electric switch, in particular for an electric tool with an electric motor. The switch has first electrical terminals for electrical connection to a voltage supply and second electrical terminals for electrical connection to the electric motor. The switch has an actuating mechanism which can be adjusted between an initial position and a final position, wherein the electric motor is switched off when the actuating mechanism is located in the initial position and is switched on when the actuating mechanism is not located in the initial position. The switch also has a braking circuit for braking the electric motor, the braking circuit operating when the actuating mechanism is reset to the initial position. The switch also has a reversal circuit for switching over the direction of rotation of the electric motor. The braking circuit is arranged between the second electrical terminals and the reversal circuit. | 03-08-2012 |
20120013205 | ADJUSTING DEVICE FOR AN ELECTRIC MOTOR - A device for reversing the direction of rotation and/or for adjusting the carbon brushes for a reversible electric motor, in particular for an electric hand tool, with a base and with a mount, which is mounted pivotably on the base and on which brushholders for the carbon brushes wiping over the collector of the electric motor are arranged. The electric motor can be driven by means of power electronics, such as a pulse width controller, a phase gating controller, a phase chopping controller or the like. The power electronics are arranged on the base and/or on the mount. The device furthermore has fixed contacts and switching contacts, which interact with alternate contact-making for reversing the direction of rotation of the electric motor as the mount is pivoted. | 01-19-2012 |
20120006662 | ELECTRICAL SWITCH - The invention relates to an electrical switch, in particular for an electric tool with an electric motor, such as for an electric drill, a hammer drill, an electric screwdriver or the like, with an actuating mechanism which can be adjusted between an initial position and a final position. The switch has a signaling device, which is operatively connected to the actuating mechanism, for generating a signal associated with the adjustment path of the actuating mechanism. Furthermore, the switch has a contact system, the actuating mechanism having a switching effect on the contact system in one position. The contact system is configured as a spring-action contact system. | 01-12-2012 |
20110063438 | PROCESSING METHOD USING AN ELECTRIC TOOL - The invention relates to a method and an apparatus for processing a workpiece, such as a wall, a ceiling, a floor or the like in a building, by means of an appliance which can be moved, in particular an electric tool, wherein the appliance can be moved to at least one predeterminable nominal position. Essentially continuous position identification, in particular by means of optical methods, is carried out for the respective actual position of the appliance and/or of an object which can be moved corresponding to the appliance. The position information, such as the coordinates of the respective determined actual position and/or information relating to any, discrepancy between the nominal position and the actual position, is transmitted wirelessly to the appliance. The respective position information is indicated to the user on the appliance, for manual position control. | 03-17-2011 |
20100314147 | POWER TOOL - The invention relates to a power tool, such as an impact drilling machine, impact screwdriver, saber saws, grinders, or the like, comprising a housing. In the housing, an electric motor and an electric or electronic module that is attached to holders in the housing, for example, an electric switch or electronics, are provided. Between the holders in the housing and the electrical or electronic modules, a vibration decoupling element is disposed. | 12-16-2010 |
20090272637 | ELECTRICAL SWITCH - The invention relates to an electrical switch, in particular in the form of a microswitch and/or snap-action switch, having a housing which comprises a base and a cover. The switch has a contact system, which comprises a movable switching contact and at least one stationary contact. Furthermore, the switch has a moving operating member for switching of the contact system. The cover is mounted on the base such that it can move, and the operating member is formed by the cover. | 11-05-2009 |
20090213545 | CONTROL DEVICE, IN PARTICULAR IN THE FORM OF AN ELECTRIC SWITCH FOR ELECTRIC HANDTOOLS - A control device, in particular an electrical switch for use for an electrical tool such as a rechargeable-battery and/or plug-powered electrical tool having an electric motor. The switch has a housing for holding at least one heat-generating component such as a power transistor, a MOSFET, a triac or the like, which is arranged in particular in an electrical circuit arrangement which, for example, is used for open-loop and/or closed-loop control of the electric motor by appropriate open-loop and/or closed-loop control of the electrical load current flowing through the component to the electric motor. A means for thermal conduction is connected on the one hand to the housing of the electrical switch, and/or to the heat-generating component, in particular to the power semiconductor which is located in the housing, and on the other hand to a cooled area which is associated with the switch. | 08-27-2009 |
20090200961 | ELECTRICAL DEVICE, IN PARTICULAR AN ELECTRIC POWER TOOL OR AN ELECTRICAL APPLIANCE - An electric appliance having a main electric load, an auxiliary electric load, and a voltage supply for operating both electric loads. An auxiliary voltage is generated by the voltage supply and supplied to the auxiliary electric load at a constant level so that the power of the auxiliary electric load remains substantially the same irrespective of voltage fluctuations in the voltage supply. | 08-13-2009 |
20090133453 | ELECTRIC STEERING LOCK, IN PARTICULAR FOR A MOTOR VEHICLE - An electric steering lock for a drive authorization system in a motor vehicle, including a movable locking element which, according to a first position, can be brought into locking engagement with a latched-in position on the steering shaft in the steering wheel column and, according to a second position, can be brought out of locking engagement with said position. The steering lock also has a drive for moving the locking element between the two positions, and electronics for controlling the drive. The system may have an associated second device in the form of an electronic key, an identification (ID) transmitter, a chip card or the like, with the result that, when the second device is authorized, the drive can be controlled into the respective position by the electronics. The electronics generate those signals which are used to trigger functions which can otherwise be effected by an electric ignition lock. | 05-28-2009 |
20090026052 | ELECTRIC SWITCH - The invention relates to an electrical switch for an electrical appliance, in particular for an electrical tool, such as a drill, a grinder, a saw, a plane, an angle grinder or the like, and having a housing. The switch has a contact system which is located in the housing, and electrical connections, which lead into the housing and/or are located in the housing, for electrical supply lines to the contact system. Furthermore, the switch may have an operating member for switching action on the contact system, with the contact system being operatively connected to the operating member by means of an elastic element. The electrical connections have seals. | 01-29-2009 |