# US 8,783,422 B2 · Drive for actuating a parking brake > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,783,422 B2 - Document ID: US8783422B2 - Status: Granted - Kind: B2 - Application number: 13/522,268 - Filed: 2011-01-12 - Published: 2013-08-01 - Granted: 2014-07-22 - Earliest claimed: 2010-01-13 - Assignees: IMS Gear GmbH - Applicants: Wolfram-Heinrich Hofschulte - Inventors: Wolfram-Heinrich Hofschulte - Web page: https://patentgrep.com/patent/US8783422B2 ## CPC - F16D 65/18: adapted for drawing members together {, e.g. for disc brakes} - B60T 7/107: {with electrical power assistance} - B60T 13/02: with mechanical assistance or drive {(combined with fluid pressure B60T13/588)} - B60T 13/741: {acting on an ultimate actuator} - B60T 13/746: {and mechanical transmission of the braking action} - F16D 65/0075: {assembled from a plurality of parts} - F16D 2121/24: using motors - F16D 2125/22: acting transversely to the axis of rotation - F16D 2125/24: Rack-and-pinion - F16D 2125/52: with non-parallel stationary axes, e.g. worm or bevel gears - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES ## Abstract A system for a drive for actuating a parking brake operably involves a brake caliper. The brake caliper has at least one brake piston with a brake piston axis, the piston being actuatable by means of an operably actuating lever with a rotational center. An electric motor is fixed to the brake caliper and mechanically coupled to the actuating lever with the output shaft that exits the electric motor. ## Claims ### Claim 1 A drive, for actuating a parking brake in a brake caliper, said drive comprising: at least one brake caliper, further comprising: at least one brake piston operable along a brake piston axis positioned on an actuation side; and an electromotor having an output shaft providing motive rotational force fixably secured with said brake caliper; said brake piston operably engaging an actuation lever having a respective center of rotation; said output shaft being operably coupled to said actuation lever, whereby operating said actuation lever operates said brake piston; said actuation lever operating said brake piston; said electromotor comprising a worm element on said output shaft; said worm element operably coupled to said brake piston during a use thereof; said output shaft and said worm element rotating cooperatively during a use of said drive along a worm-spindle transmission; said worm-spindle transmission having a spindle; and said spindle operably coupled to said actuation lever during said use. ### Claim 2 (depends on 1) The drive, according to claim 1, wherein: said spindle is aligned along a spindle axis; and said spindle axis arranged opposing said motor axis. ### Claim 3 (depends on 2) The drive, according to claim 2, further comprising: a toothed segment on a distal end of said actuation lever. ### Claim 4 (depends on 3) The drive, according to claim 3, wherein: said toothed segment is arrayed facing away from said center of rotation of said actuation lever; and said toothed segment is arrayed convexly away from said center of rotation. ### Claim 5 (depends on 4) The drive, according to claim 4, wherein: said toothed segment operatively cooperates with said spindle; and said toothed segment operatively cooperates with said spindle through at least one of a toothed rack and a worm element. ### Claim 6 (depends on 2) The drive, according to claim 2, further comprising: an oblong hole defined on a distal end of said actuation lever; said oblong hole extending along a direction toward an operable center of rotation of said actuation lever; and said spindle operably engaging said oblong hole in a pivotable manner, whereby during said use said actuation lever is pivotable about said center of rotation. ### Claim 7 (depends on 2) The drive, according to claim 2, wherein: said actuation lever operably engages with a spindle nut; said spindle nut operably interengaging said spindle in such a manner allowing said spindle nut to rotate un unison with said rotation spindle; and said spindle driven by said electromotor. ### Claim 8 (depends on 1) The drive, according to claim 1, further comprising: a motor axis along said output shaft; and said motor axis being aligned transversely to said brake piston axis. ### Claim 9 (depends on 8) The drive, according to claim 8, wherein: said motor axis is aligned at one of perpendicular to said brake piston axis and parallel with said brake piston axis. ### Claim 10 (depends on 1) The drive, according to claim 1, wherein: said electromotor is fixably secured on an outside of said brake caliper. ### Claim 11 (depends on 1) The drive, according to claim 1, wherein: said output shaft of electromotor is arranged substantially perpendicular to said spindle. ### Claim 12 A drive, for actuating a parking brake in a brake caliper, said drive comprising: at least one brake caliper, further comprising: at least one brake piston operable along a brake piston axis positioned on an actuation side; an electromotor having an output shaft providing motive rotational force fixably secured with said brake caliper; and an oblong hole defined on a distal end of said actuation lever; said brake piston operably engaging an actuation lever having a respective center of rotation; said output shaft being operably coupled to said actuation lever, whereby operating said actuation lever operates said brake piston; said electromotor further comprising a worm element on said output shaft; said worm element operably coupled to said brake piston during a use thereof; said output shaft and said worm element cooperatively rotatable during a use of said drive along a worm-spindle transmission; said worm-spindle transmission having a spindle; said spindle being aligned along said a spindle axis and operably coupled to said actuation lever during said use; said spindle axis being arranged opposing said motor axis; said oblong hole extending along a direction toward an operable center of rotation of said actuation lever; and said spindle operably engaging said oblong hole in a pivotable manner, whereby during said use said actuation lever is pivotable about said center of rotation. ### Claim 13 (depends on 12) The drive, according to claim 12, further comprising: a toothed segment on a distal end of said actuation lever. ### Claim 14 (depends on 13) The drive, according to claim 13, wherein: said toothed segment is arrayed facing away from said center of rotation of said actuation lever; and said toothed segment is arrayed convexly away from said center of rotation. ### Claim 15 (depends on 14) The drive, according to claim 14, wherein: said toothed segment operatively cooperates with said spindle; and said toothed segment operatively cooperates with said spindle through at least one of a toothed rack and a worm element. ### Claim 16 (depends on 12) The drive, according to claim 12, further comprising: a motor axis along said output shaft; and said motor axis being aligned transversely to said brake piston axis. ### Claim 17 (depends on 16) The drive, according to claim 16, wherein: said motor axis is aligned at one of perpendicular to said brake piston axis and parallel with said brake piston axis. ### Claim 18 (depends on 12) The drive, according to claim 12, wherein: said electromotor is fixably secured on an outside of said brake caliper. ### Claim 19 (depends on 12) The drive, according to claim 12, wherein: said exiting output shaft of electromotor is arranged facing said brake position. ### Claim 20 (depends on 12) The drive, according to claim 12, wherein: said center of rotation of said actuation lever lies on said motor axis. ### Claim 21 (depends on 12) The drive, according to claim 12, wherein: said actuation lever operably engages with a spindle nut; said spindle nut operably interengaging said spindle in such a manner allowing said spindle nut to rotate un unison with said rotation spindle; and said spindle driven by said electromotor. ### Claim 22 A drive, for actuating a parking brake in a brake caliper, said drive comprising: at least one brake caliper, further comprising: at least one brake piston operable along a brake piston axis positioned on an actuation side; an electromotor having an output shaft providing motive rotational force fixably secured with said brake caliper; and a motor axis along said output shaft and aligned transversely to said brake piston axis; said brake piston operably engaging an actuation lever having a respective center of rotation; said center of rotation of said actuation lever lies on said motor axis; said output shaft being operably coupled to said actuation lever, whereby operating said actuation lever operates said brake piston; said output shaft and a drive-worm rotate cooperatively during a use of said drive along a worm-spindle transmission; said worm-spindle transmission having a spindle; said spindle aligned along said a spindle axis and operably coupled to said actuation lever during said use; and said spindle axis arranged opposing said motor axis. ### Claim 23 (depends on 22) The drive, according to claim 22, further comprising: a toothed segment on a distal end of said actuation lever. ### Claim 24 (depends on 23) The drive, according to claim 23, wherein: said toothed segment is arrayed facing away from said center of rotation of said actuation lever; and said toothed segment is arrayed convexly away from said center of rotation. ### Claim 25 (depends on 23) The drive, according to claim 23, wherein: said toothed segment operatively cooperates with said spindle; and said toothed segment operatively cooperates with said spindle through at least one of a toothed rack and a worm element. ### Claim 26 (depends on 22) The drive, according to claim 22, further comprising: an oblong hole defined on a distal end of said actuation lever; said oblong hole extending along a direction toward an operable center of rotation of said actuation lever; and said spindle operably engaging said oblong hole in a pivotable manner, whereby during said use said actuation lever is pivotable about said center of rotation. ### Claim 27 A drive, for actuating a parking brake in a brake caliper, said drive comprising: at least one brake caliper, further comprising: at least one brake piston operable along a brake piston axis positioned on an actuation side; an electromotor having an output shaft providing motive rotational force fixably secured with said brake caliper; a motor axis along said output shaft and aligned transversly to said brake piston axis; and an oblong hole defined on a distal end of said actuation lever; said brake piston operably engaging an actuation lever having a respective center of rotation; said center of rotation of said actuation lever lies on said motor axis; said output shaft being operably coupled to said actuation lever, whereby operating said actuation lever operates said brake piston; said output shaft and a drive worm cooperatively rotatable during a use of said drive along a worm-spindle transmission; said worm-spindle transmission having a spindle; said spindle being aligned along said a spindle axis and operably coupled to said actuation lever during said use; said spindle axis being arranged opposing said motor axis; said oblong hole extending along a direction toward an operable center of rotation of said actuation lever; and said spindle operably engaging said oblong hole in a pivotable manner, whereby during said use said actuation lever is pivotable about said center of rotation. ### Claim 28 (depends on 27) The drive, according to claim 27, further comprising: a toothed segment on a distal end of said actuation lever. ### Claim 29 (depends on 28) The drive, according to claim 28, wherein: said toothed segment is arrayed facing away from said center of rotation of said actuation lever; and said toothed segment is arrayed convexly away from said center of rotation. ### Claim 30 (depends on 28) The drive, according to claim 28, wherein: said toothed segment operatively cooperates with said spindle; and said toothed segment operatively cooperates with said spindle through at least one of a toothed rack and a worm element.