# US 7,608,346 B2 · Magnetic field sensor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,608,346 B2 - Document ID: US7608346B2 - Status: Granted - Kind: B2 - Application number: 11/296,766 - Filed: 2005-12-07 - Published: 2006-06-22 - Granted: 2009-10-27 - Earliest claimed: 2004-12-20 - Assignees: Robert Bosch GmbH - Inventors: Alexander Braun; Andreas Herzberger; Steffen Waldenmeier - Web page: https://patentgrep.com/patent/US7608346B2 ## CPC - G01D 11/245: {Housings for sensors} - G01P 1/026: {for speed measuring devices, e.g. pulse generator} - G01P 3/488: delivered by variable reluctance detectors - Y10T 428/32: Composite [nonstructural laminate] of inorganic material having metal-compound-containing layer and having defined magnetic layer - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR - G01P: MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V; {measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08G}) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A magnetic field sensor, in particular an rpm sensor and/or rotational direction sensor and/or position sensor for the drive train of a motor vehicle, has a sensor array, with a sensor element that responds to a magnetic field, and optionally with a permanent magnet, the latter being sheathed with plastic jointly with the sensor array and parts of terminal conductor tracks, and the conductor tracks are embodied in one piece with a fixing element for the permanent magnet and the sensor array as a stamped grid, wherein stamped grid is shaped as a three-dimensional structure which carries the sensor array and optionally embraces the permanent magnet in the manner of a mount, and the mount and the terminal conductor tracks are first stamped out from a metal sheet as a gridlike developed form, and then deformed to form the mount. ## Claims ### Claim 1 A magnetic field sensor, comprising: a mount stamped from a single sheet of metal to form a stamped grid which forms terminal conductor tracks, means for fixing a sensor array on a face-end portion of the mount, and means for seating a permanent magnet formed from the mount itself, wherein a permanent magnet is positioned and locked in said means; a sensor array comprising a sensor element that responds to a magnetic field fixed on said means for fixing a sensor array on said mount; and sheathing means which sheath said sensor array and parts of said terminal conductor tracks in plastic; and said stamped grid is configured such that said face-end portion of said mount is parallel to a face of said permanent magnet. ### Claim 2 (depends on 1) The magnetic field sensor as defined in claim 1, wherein said sheet of metal is a sheet of copper bronze. ### Claim 3 (depends on 2) The magnetic field sensor as defined in claim 2, wherein said copper bronze is CuSn6. ### Claim 4 (depends on 1) The magnetic field sensor as defined in claim 1, wherein the surface of said stamped grid is coated with a metal at least in points selected from the group consisting of soldering points and welding points. ### Claim 5 (depends on 4) The magnetic field sensor as defined by claim 4, wherein said metal coating said stamped grid is tin. ### Claim 6 (depends on 1) The magnetic field sensor as defined in claim 1; and further comprising a ferromagnetic scattering disk which is located in said mount between said permanent magnet and said sensor array. ### Claim 7 (depends on 6) The magnetic field sensor as defined in claim 6, wherein said mount has elastically deformable portions for clampingly receiving elements selected from the group consisting of said permanent magnet, said sensor array, said scattering disk, and combinations thereof. ### Claim 8 (depends on 1) The magnetic field sensor as defined in claim 1, wherein said mount has an opening in a region of said sensor array. ### Claim 9 (depends on 1) The magnetic field sensor as defined in claim 1; wherein said sheathing means is composed of plastic selected from the group consisting of thermoplastic and pressure-sensitive plastic and covering said mount together with said permanent magnet, said sensor array, and parts of said conductor tracks. ### Claim 10 (depends on 9) The magnetic field sensor as defined in claim 9, wherein said sheath also covers other components. ### Claim 11 (depends on 1) The magnetic field sensor as defined in claim 1, wherein the magnetic field sensor is a sensor selected from the group consisting of an rpm sensor, a rotational direction sensor, and a position sensor. ### Claim 12 (depends on 1) The magnetic field sensor as defined in claim 1, wherein the magnetic field sensor is a sensor configured for a drive train of a motor vehicle.