# US 2019/0376322 A1 · Lock mechanism and door assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0376322 A1 - Document ID: US20190376322A1 - Status: Published application - Kind: A1 - Application number: 16/548,259 - Filed: 2019-08-22 - Published: 2019-12-12 - Earliest claimed: 2017-05-31 - Assignees: Westinghouse Air Brake Technologies Corporation - Applicants: Westinghouse Air Brake Technologies Corporation - Inventors: Gunneet Singh - Web page: https://patentgrep.com/patent/US20190376322A1 ## CPC - E05B 81/18: to effect movement of a bolt or bolts (E05B81/20 takes precedence) - E05B 81/28: Linearly reciprocating elements - E05B 81/30: Rotary elements - E05B 81/42: Cams - E05C 1/02: without latching action - E05F 15/40: Safety devices, e.g. detection of obstructions or end positions - B61D 19/02: for carriages (B61D19/003 takes precedence) - E05B 81/40: Nuts or nut-like elements moving along a driven threaded axle - E05B 83/04: for sliding wings - E05B 83/363: {for railway vehicles (E05B77/54 takes precedence)} - E05Y 2900/51: for railway cars or mass transit vehicles - E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS - E05C: BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS (latching means for sideboard or tailgate structures for vehicles B62D, {B62D33/02}; fastening devices for constructional or engineering elements E04, F16B; locks, fastening devices structurally or operatively combined or having significant cooperation with locks E05B; means for operating or controlling wing fasteners in conjunction with mechanisms for moving the wing E05F) - E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING - B61D: BODY DETAILS OR KINDS OF RAILWAY VEHICLES (vehicles in general B60; adaptation of vehicles to special systems B61B; underframes B61F) - E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF ## Abstract A lock mechanism is provided for use with a door assembly. The lock mechanism includes a lock bracket configured to connect to a door or hatch; a lock pin can be selectively moved between an engaged position in which the lock pin engages the lock bracket and a disengaged position in which the lock pin does not engage the lock bracket; and a linkage assembly connected to the lock pin and configured to be actuated to reversibly move the lock pin between the engaged position and the disengaged position, and a door or hatch release device can switch the lock pin from the engaged position to the disengaged position if the door or hatch release device is actuated after the linkage assembly has moved the lock pin into the engaged position. ## Claims ### Claim 1 A lock mechanism, comprising: a lock bracket configured to connect to a door or hatch; a lock pin configured to be selectively moved between an engaged position in which the lock pin engages the lock bracket and a disengaged position in which the lock pin does not engage the lock bracket; and a linkage assembly connected to the lock pin and configured to be actuated to reversibly move the lock pin between the engaged position and the disengaged position, and a door or hatch release device configured to switch the lock pin from the engaged position to the disengaged position if the door or hatch release device is actuated after the linkage assembly has moved the lock pin into the engaged position. ### Claim 2 (depends on 1) The lock mechanism according to claim 1, further comprising a door operator system having an overcenter locking mechanism, and the door operator system is configured to move the door or hatch relative to a vehicle opening or portal in at least one of the following ways: from an open position to a closed position, and thereby to close the vehicle opening or portal; from the closed position to the open position, and thereby to open the vehicle opening or portal; and from the close position or open position to an intermediate position, and thereby to partially open or partially close the opening or portal, and the overcenter locking mechanism is configured to selectively lock the door or hatch, and wherein actuation of the door or hatch release device unlocks the overcenter locking mechanism of the door operator system. ### Claim 3 (depends on 1) The lock mechanism according to claim 1, wherein the linkage assembly is configured to be switched between an activated state in which operation of the door or hatch release device actuates the linkage assembly and a deactivated state in which operation of the door or hatch release device does not actuate the linkage assembly. ### Claim 4 (depends on 3) The lock mechanism according to claim 3, further comprising a mask plate and a pivot shaft rotatably connecting the mask plate to a journal bearing, and the mask plate is pivotable on the pivot shaft between a blocking position in which the mask plate is disposed in a linear path of the lock pin to prevent the lock pin from moving to the engaged position and a releasing position in which the mask plate is disposed away from the linear path of the lock pin. ### Claim 5 (depends on 4) The lock mechanism according to claim 4, wherein the mask plate is biased toward the blocking position. ### Claim 6 (depends on 4) The lock mechanism according to claim 4, wherein the mask plate comprises a bumper pin configured to be engaged by the lock bracket such that the mask plate is moved to the releasing position by the lock bracket as the door or hatch closes. ### Claim 7 (depends on 1) The lock mechanism according to claim 1, wherein the linkage assembly comprises: a first arm configured to be connected to the door or hatch release device; a second arm connected to the first arm; a rotating shaft connected to the second arm; a cam fixedly connected to the rotating shaft; and a lever rotatably connected to the cam and the lock pin, and the second arm is connected to the first arm such that movement of the first arm due to operation of the door or hatch release device causes the second arm to rotate about a connection between the second arm and the rotating shaft, which causes rotation of the rotating shaft and the cam, rotation of the cam causes rotation of the lever, and rotation of the lever moves the lock pin linearly between the engaged and disengaged positions. ### Claim 8 (depends on 7) The lock mechanism according to claim 7, wherein the linkage assembly further comprises a fixed shaft, wherein the fixed shaft engages the lever to guide the rotation of the lever. ### Claim 9 (depends on 7) The lock mechanism according to claim 7, wherein the first arm is slotted and is connected to the second arm by a linkage fastener configured to slide with respect to the slotted first arm. ### Claim 10 (depends on 9) The lock mechanism according to claim 9, wherein the linkage assembly is configured to be switched between an activated state in which the linkage fastener engages an end of the first arm such that operation of the door or hatch release device actuates the linkage assembly and a deactivated state in which the linkage fastener engages the first arm away from the end such that operation of the door or hatch release device does not actuate the linkage assembly. ### Claim 11 A door assembly for a vehicle having a door opening formed in or defined by a wall of the vehicle, the door assembly comprising: a door operator system configured to move at least one door along the door opening between open and closed positions; a lock mechanism configured to selectively lock the at least one door, comprising: a lock bracket connected to the door; a lock pin configured to be moved between an engaged position in which the lock pin is extended to engage the lock bracket and a disengaged position in which the lock pin is withdrawn from the lock bracket; and a linkage assembly connected to the lock pin and configured to be actuated to reversibly move the lock pin between the engaged position and the disengaged position; and a release device configured to disengage the lock mechanism and thereby to unlock the at least one door. ### Claim 12 (depends on 11) The door assembly according to claim 11, wherein the linkage assembly is configured to switch between an activated state in which operation of the release device actuates the linkage assembly and a deactivated state in which operation of the release device does not actuate the linkage assembly. ### Claim 13 (depends on 11) The door assembly according to claim 11, wherein the lock mechanism further comprises a journal bearing that supports linear motion of the lock pin between the engaged position and the disengaged position. ### Claim 14 (depends on 13) The door assembly according to claim 13, wherein the lock mechanism further comprises a mask plate and a pivot shaft rotatably connecting the mask plate to the journal bearing, and the mask plate is pivotable on the pivot shaft between a blocking position in which the mask plate is disposed in a linear path of the lock pin to prevent the lock pin from moving to the disengaged position and a releasing position in which the mask plate is disposed away from the linear path of the lock pin. ### Claim 15 (depends on 11) The door assembly according to claim 11, wherein the linkage assembly comprises: a first arm connected to the release device; a second arm connected to the first arm; a rotating shaft connected to the second arm; a cam fixedly connected to the rotating shaft; and a lever rotatably connected to the cam and the lock pin, and the second arm is connected to the first arm such that movement of the first arm due to operation of the release device causes the second arm to rotate about a connection between the second arm and the rotating shaft, which causes: rotation of the rotating shaft and the cam, and rotation of the cam causes rotation of the lever, and rotation of the lever causes linear motion of the lock pin between the engaged and disengaged positions. ### Claim 16 (depends on 15) The door assembly according to claim 15, wherein the first arm is slotted and is connected to the second arm by a linkage fastener configured to slide with respect to the first arm, and the linkage assembly is configured to be switched between an activated state in which the linkage fastener engages an end of the first arm such that operation of the release device actuates the linkage assembly and a deactivated state in which the linkage fastener engages the first arm away from the end such that operation of the release device does not actuate the linkage assembly. ### Claim 17 (depends on 16) The door assembly according to claim 16, wherein the door operator system comprises an overcenter locking mechanism and actuation of the release device to unlock the overcenter locking mechanism of the door operator system simultaneously actuates the lock mechanism to move the lock pin to the disengaged position. ### Claim 18 An isolation lock mechanism for a transit vehicle door, comprising: a lock bracket configured to be connected to the transit vehicle door; a lock pin configured to be moved between an engaged position in which the lock pin is extended to engage the lock bracket and a disengaged position in which the lock pin is withdrawn from the lock bracket; and a linkage assembly connected to the lock pin and configured to be actuated to move the lock pin between the engaged position and the disengaged position, wherein the linkage assembly is configured to be connected to an emergency release device such that operation of the emergency release device actuates the linkage assembly to move the lock pin from the engaged position to the disengaged position, and the linkage assembly comprises: a first arm configured to be connected to the emergency release device; a second arm connected to the first arm; a rotating shaft connected to the second arm; a cam fixedly connected to the rotating shaft; and a lever rotatably connected to the cam and the lock pin, wherein the second arm is connected to the first arm such that movement of the first arm due to operation of the emergency release device causes the second arm to rotate about a connection between the second arm and the rotating shaft, which causes rotation of the rotating shaft and the cam, wherein rotation of the cam causes rotation of the lever, and rotation of the lever causes linear motion of the lock pin between the engaged and disengaged positions. ### Claim 19 (depends on 18) The isolation lock mechanism according to claim 18, further comprising a journal bearing that supports linear motion of the lock pin between the engaged position and the disengaged position. ### Claim 20 (depends on 19) The isolation lock mechanism according to claim 19, further comprising a mask plate and a pivot shaft rotatably connecting the mask plate to the journal bearing, wherein the mask plate is pivotable on the pivot shaft between a blocking position in which the mask plate is disposed in a linear path of the lock pin to prevent the lock pin from moving to the engaged position and a releasing position in which the mask plate is disposed away from the linear path of the lock pin.