# US 10,873,242 B2 · Tuning of a kinematic relationship between members > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,242 B2 - Document ID: US10873242B2 - Status: Granted - Kind: B2 - Application number: 16/124,688 - Filed: 2018-09-07 - Published: 2019-06-06 - Granted: 2020-12-22 - Earliest claimed: 2014-08-18 - Assignees: Eddy Current Limited Partnership - Applicants: Eddy Current Limited Partnership - Inventors: Andrew Karl Diehl; Christopher James Allington - Web page: https://patentgrep.com/patent/US10873242B2 ## CPC - H02K 7/104: with eddy-current brakes - B60L 3/0007: {Measures or means for preventing or attenuating collisions} - B60L 7/28: Eddy-current braking - B60R 22/343: with electrically actuated locking means {(B60R22/3405 takes precedence)} - F16D 43/14: with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members - H02K 7/10: Structural association with clutches, brakes, gears, pulleys or mechanical starters - H02K 49/04: of the eddy-current hysteresis type - H02K 2213/09: Machines characterised by the presence of elements which are subject to variation, e.g. adjustable bearings, reconfigurable windings, variable pitch ventilators - Y02T 10/64: Electric machine technologies in electromobility - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract Described herein is a device comprising members in a kinematic relationship. The kinematic relationship is at least partially governed by at least one magnetically induced force that introduces a force threshold that, in effect, provides a threshold to part movement and confers a degree of hysteresis, preventing movement until a sufficiently large energizing force is applied. The effect may be further altered by use of an additional magnetically induced force interaction with at least one further member to urge or slow movement once started and/or to prevent movement once a new position is reached. ## Claims ### Claim 1 A brake device comprising: at least one first member being a pawl or arm mechanically linked to a second member, the second member being a rotating rotor, and at least one third member, the at least one third member interacting with the at least one first member based on relative movement between the at least one first and at least one third members inducing an eddy current brake effect between the at least one first and third members; at least one magnetically attracted relationship between the at least one first and second members that introduces a force threshold that confers a degree of hysteresis preventing movement between the first and second members up to a force threshold and, when this force threshold is exceeded by application of an energizing force of sufficient magnitude to the second member, the magnetically attracted relationship between the first and second members is overcome and the at least one first member then moves relative to the second member; and as the at least one first member moves relative to the second member, the at least one first member interacts with the third member to induce an eddy current brake effect between the at least one first and third members in turn braking relative movement between the third member and second member via the at least one first member. ### Claim 2 (depends on 1) The brake device as claimed in claim 1 wherein the magnetically attracted relationship is between at least one ferromagnetic element and/or region on and/or within the at least one first member and at least one magnetic element and/or region on and/or within the second member. ### Claim 3 (depends on 1) The brake device as claimed in claim 1 wherein the magnetically attracted relationship is between at least one ferromagnetic element and/or region on and/or within the second member and at least one magnetic element and/or region on and/or within the at least one first member. ### Claim 4 (depends on 1) The brake device as claimed in claim 1 wherein the magnetically induced force is between at least one magnetic element and/or region on and/or within the at least one first member of a first polarity and at least one magnetic element and/or region on and/or within the second member of a second polarity opposite to that of the first polarity. ### Claim 5 (depends on 1) The brake device as claimed in claim 1 wherein the at least one first member moves directly due to the energizing force. ### Claim 6 (depends on 1) The brake device as claimed in claim 1 wherein the at least one first member moves indirectly at least in part due to the energizing force imposed on the second member causing at least one additional mechanical part or force dynamic to move or interact with the at least one first member and thereby subsequently causing motion of the at least one first member. ### Claim 7 (depends on 1) The brake device as claimed in claim 1 wherein relative movement between the at least one first member and at least one third member is frictionless. ### Claim 8 (depends on 1) The brake device as claimed in claim 1 wherein the at least one first member is linked to the rotor at a position adjacent to the rotor and, when the magnetically attracted relationship is overcome, at least part of the at least one first member moves outside the region bound by the rotor. ### Claim 9 (depends on 8) The brake device as claimed in claim 8 wherein the at least one first member is pivotally attached to the rotor about a pivot axis offset from the rotor axis. ### Claim 10 (depends on 1) The brake device as claimed in claim 1 wherein once the magnetically attracted relationship is overcome, the at least one first member moves relative to the second member until the at least one first member engages with at least one latching member on or separate to the at least one third member and, when engagement occurs relative motion is prevented between the second member and at least one latching member via the at least one first member. ### Claim 11 (depends on 1) The brake device as claimed in claim 1 wherein the at least one first member or a part thereof is electrically conductive and the at least one third member comprises at least one magnet generating a magnetic field. ### Claim 12 (depends on 1) The brake device as claimed in claim 1 wherein the at least one first member or a part thereof is at least one magnet generating a magnetic field and the at least one third member is itself in part or in whole electrically conductive. ### Claim 13 (depends on 1) The brake device as claimed in claim 1 wherein the at least one third member is stationary relative to the at least one first member. ### Claim 14 (depends on 1) The brake device as claimed in claim 1 wherein the brake device is free of liquid. ### Claim 15 (depends on 1) A line dispensing device incorporating at least one brake device as claimed in claim 1. ### Claim 16 (depends on 1) A passenger seat restraint incorporating at least one brake device as claimed in claim 1. ### Claim 17 (depends on 1) A transmission drive incorporating at least one brake device to engage a rotational drive as claimed in claim 1. ### Claim 18 (depends on 1) A linear guided lifeline incorporating at least one brake device as claimed in claim 1. ### Claim 19 A brake device comprising: at least one first member being a pawl or arm mechanically linked to a second member, the second member being a linear translating carriage, and at least one third member, the at least one third member interacting with the at least one first member based on relative movement between the at least one first and at least one third members inducing an eddy current brake effect between the first and third members; at least one magnetically attracted relationship between the at least one first and second members that introduces a force threshold that confers a degree of hysteresis preventing movement between the at least one first and second members up to a force threshold and, when this force threshold is exceeded by application of an energizing force of sufficient magnitude to the second member, the magnetically attracted relationship between the first and second members is overcome and the at least one first member then moves relative to the second member; and as the at least one first member moves relative to the second member, the at least one first member interacts with the third member to induce an eddy current brake effect between the first and third members in turn braking relative movement between the third member and second member via the at least one first member. ### Claim 20 (depends on 19) The brake device as claimed in claim 19 wherein the carriage linearly translates on application of the energizing force and, when the magnetically attracted relationship is overcome, at least part of the at least one first member moves outside the region bound by the carriage. ### Claim 21 (depends on 20) The brake device as claimed in claim 20 wherein the at least one first member is pivotally attached to the carriage.