# US 10,501,097 B2 · Automatic parking brake for truck mounted brake cylinder > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,501,097 B2 - Document ID: US10501097B2 - Status: Granted - Kind: B2 - Application number: 16/129,985 - Filed: 2018-09-13 - Published: 2019-01-17 - Granted: 2019-12-10 - Earliest claimed: 2015-04-06 - Assignees: New York Air Brake Corporation - Applicants: New York Air Brake, LLC - Inventors: Howard Huber, Jr.; Keith Parnapy; Robert Neulieb - Web page: https://patentgrep.com/patent/US10501097B2 ## CPC - B61H 13/00: Actuating rail-vehicle brakes - B60T 7/128: {Self-acting brakes of different types for railway vehicles (B60T7/12 takes precedence; self-acting brakes in general F16D59/00)} - B60T 13/665: {the systems being specially adapted for transferring two or more command signals, e.g. railway systems (B60T13/662 takes precedence)} - B60T 17/16: Locking of brake cylinders - B61H 13/02: Hand or other personal actuation - B61H 13/34: Details - F16D 2127/06: Locking mechanisms, e.g. acting on actuators, on release mechanisms or on force transmission mechanisms - B61H: BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES (arrangements in rail vehicles for adjusting wheel-braking force to meet varying vehicular or permanent-way conditions B60T8/00; transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive, brake systems incorporating such transmitting means, e.g. air-pressure brake systems, B60T13/00; construction, arrangement or operation of valves incorporated in power brake systems B60T15/00; component parts, details or accessories of brake systems B60T17/00) - 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 - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES ## Abstract An automatic parking brake for a truck mounted brake cylinder. The automatic parking brake includes rod that is interconnected to a piston of the brake cylinder and can prevent the piston from returning to the brakes releases position. The rod is controlled by locking nut that will rotate if the rod moves axially through the locking nut and a locking sleeve that is moveable between a locked position, where the locking sleeve engages the locking nut and prevents from the nut from rotating, and a released position, where the locking sleeve is disengages from the locking nut and the locking nut is free to rotate. A spring provides a force biasing the locking nut into the locked position, and brake pipe pressure biases the locking sleeve into the released position. ## Claims ### Claim 1 An automatic parking brake, comprising: a rail car brake beam; a housing associated with the rail car brake beam; a locking nut positioned in the housing for rotation within the housing and having a post that extends out of the housing; a rail car brake lever secured to the post of the locking nut so that the locking nut will rotate with the rail car brake lever; a locking sleeve positioned in the housing and fixed against rotation within the housing, wherein the locking sleeve is moveable axially within the housing between a first position where the locking sleeve is engaged with the locking nut to prevent rotation of the locking nut within the housing and a second position where the locking sleeve is disengaged from the locking nut so that the locking nut is allowed to rotate within the housing. ### Claim 2 (depends on 1) The automatic parking brake of claim 1, further comprising a spring positioned in the housing to provide a biasing force that biases the locking sleeve into the first position. ### Claim 3 (depends on 2) The automatic parking brake of claim 2, further comprising a chamber in communication with a source of brake pipe pressure and the locking sleeve so that when a predetermined amount of brake pipe pressure is supplied to the chamber the locking sleeve will be biased axially into the second position over the biasing force of the spring. ### Claim 4 (depends on 3) The automatic parking brake of claim 3, further comprising a manual release connector associated with the locking sleeve and positioned so that when a second biasing force that exceeds the first biasing force of the spring is applied to the manual release connection, the locking sleeve will move axially from the first position to the second position. ### Claim 5 (depends on 4) The automatic parking brake of claim 4, wherein the locking sleeve and the locking nut each include a set of corresponding teeth that will interlock when the locking sleeve is in the second position. ### Claim 6 (depends on 5) The automatic parking brake of claim 5, wherein the locking sleeve includes a shoulder adjacent to the brake pipe pressure chamber. ### Claim 7 (depends on 6) The automatic parking brake of claim 6, wherein the manual release connector is positioned axially opposite from the post of locking nut.