# US 11,174,581 B2 · Overlifting door latch with locking mechanism > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,174,581 B2 - Document ID: US11174581B2 - Status: Granted - Kind: B2 - Application number: 16/033,301 - Filed: 2018-07-12 - Published: 2019-01-17 - Granted: 2021-11-16 - Earliest claimed: 2017-07-13 - Assignees: emz-Hanauer GmbH & Co. KGaA - Applicants: emz-Hanauer GmbH & Co. KGaA - Inventors: Albert Dirnberger; Dominik Walz - Web page: https://patentgrep.com/patent/US11174581B2 ## CPC - D06F 37/42: Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door - E05B 47/0603: {the detent moving rectilinearly} - E05B 47/0607: {the detent moving pivotally or rotatively} - E05B 63/0056: {Locks with adjustable or exchangeable lock parts (adjustable strikers E05B15/024; adjustable to different keys E05B35/083; adjustable bolt or backset E05B63/06; adjustable coupling means for bars, rods, cables E05C9/20)} - E05C 3/24: in the form of a bifurcated member {(automatic catches with a bifurcated latch E05C19/024; locks with a bifurcated bolt E05B65/0046, E05B85/243)} - E05C 19/022: {Released by pushing in the closing direction} - D06F 39/14: Doors or covers; Securing means therefor - E05B 2047/0008: {having different functions} - E05B 2047/0081: {Same pulse to lock or unlock} - D06F: LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES - 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) ## Abstract A door latch for an electrical domestic appliance includes a rotary member rotationally movable in a rotation plane between a closing rotational position and a release rotational position, a movably arranged catch for arresting engagement by an overlifting rotational movement of the rotary member with the rotary member in its closing rotational position, and a locking assembly having a locking member movable between an unlocking position and a locking position. The rotary member is spring-biased towards the release rotational position and which, in the closing rotational position, holds a closure member to keep a door closed and, in the release rotational position, releases the closure member in order for the door to open. The locking member forms a first blocking arrangement by means of which the locking member in its locking position blocks the rotary member against rotation out of the closing rotational position into the release rotational position. ## Claims ### Claim 1 A door latch for an electrical domestic appliance, the door latch comprising: a rotary member which is arranged to be rotationally movable in a rotation plane between a closing rotational position and a release rotational position wherein the rotary member is spring-biased in the direction towards the release rotational position and is configured to hold, in the closing rotational position, a closure member in order to keep a door of the domestic appliance closed and to release, in the release rotational position, the closure member in order for the door to open; a movably arranged catch for arresting engagement with the rotary member in its closing rotational position, wherein the rotary member is provided with a sliding guide for sliding engagement by the catch as the rotary member undergoes rotational movement, wherein the arresting engagement is defined by the catch engaging behind an arresting edge formed by the sliding guide, the arresting engagement preventing the rotary member from rotating back to the release rotational position, wherein the arresting engagement is releasable by rotating the rotary member beyond the closing rotational position thereby permitting the catch to spring away sideways from the arresting edge; and a locking slider, which is arranged to be movable between an unlocking position and a locking position, wherein the locking slider is configured to block, in its locking position, the rotary member against rotation out of the closing rotational position into the release rotational position when the door s closed and permit, in the unlocking position, such rotation of the rotary member, wherein the locking slider forms a first blocking arrangement configured to be clamped between the rotary member and an abutment structure when the locking slider is in the locking position and the rotary member is in a clamping rotational position lying between the closing rotational position and the release rotational position, wherein the clamping of the first blocking arrangement is releasable by a rotational movement of the rotary member out of the clamping rotational position in the direction towards the closing rotational position, wherein an actuator including a positioning element are arranged to be positionally adjustable by activation of the actuator, wherein the locking slider is arranged to be transferred against a restoring spring force from the unlocking position to the locking position by means of coupling with the positioning element, wherein the locking slider is arranged to return from the locking position to the unlocking position through action of the restoring spring force without coupling with the positioning element. ### Claim 2 (depends on 1) The door latch according to claim 1, wherein the rotation angle between the clamping rotational position and the closing rotational position of the rotary member is smaller than the rotation angle between the clamping rotational position and the release rotational position of the rotary member. ### Claim 3 (depends on 1) The door latch according to claim 1, wherein the rotation angle between the clamping rotational position and the closing rotational position of the rotary member is not more than 15 degrees. ### Claim 4 (depends on 1) The door latch according to claim 1, wherein the rotation angle between the clamping rotational position and the closing rotational position of the rotary member is not more than 10 degrees. ### Claim 5 (depends on 1) The door latch according to claim 1, wherein the rotation angle between the clamping rotational position and the closing rotational position of the rotary member is not more than 5 degrees. ### Claim 6 (depends on 1) The door latch according to claim 1, wherein the rotary member, in its clamping rotational position, is configured to hold the closure member in order to keep the door closed. ### Claim 7 (depends on 1) The door latch according to claim 1, wherein the locking actuator is an electromagnetic actuator. ### Claim 8 (depends on 1) The door latch according to claim 1, wherein the abutment structure is formed on a housing component of a housing of the door latch which accommodates the rotary member, the catch and the locking assembly. ### Claim 9 (depends on 1) The door latch according to claim 1, wherein the locking slider is arranged to be movable transversely to the rotation plane of the rotary member at least in an end portion of its movement path that includes the locking position. ### Claim 10 (depends on 1) The door latch according to claim 1, wherein the locking slider is arranged to be movable perpendicularly to the rotation plane of the rotary member at least in an end portion of its movement path that includes the locking position. ### Claim 11 (depends on 1) The door latch according to claim 1, wherein the locking slider is in the form of a locking slider which is arranged to be linearly movable in a sliding direction perpendicular to the rotation plane of the rotary member. ### Claim 12 A door latch for an electrical domestic appliance, the door latch comprising: a rotary member which is arranged to be rotationally movable in a rotation plane between a closing rotational position and a release rotational position wherein the rotary member is spring-biased in the direction towards the release rotational position and is configured to hold, in the closing rotational position, a closure member in order to keep a door of the domestic appliance closed and to release, in the release rotational position, the closure member in order for the door to open; a movably arranged catch for arresting engagement with the rotary member in its closing rotational position, wherein the rotary member is provided with a sliding guide for sliding engagement by the catch as the rotary member undergoes rotational movement, wherein the arresting engagement is defined by the catch engaging behind an arresting edge formed by the sliding guide, the arresting engagement preventing the rotary member from rotating back to the release rotational position, wherein the arresting engagement is releasable by rotating the rotary member beyond the closing rotational position thereby permitting the catch to spring away sideways from the arresting edge; and a locking slider arranged to be movable between an unlocking position and a locking position, the locking slider configured to block, in its locking position, the rotary member against rotation out of the closing rotational position into the release rotational position when the door is closed and permit, in the unlocking position, such rotation of the rotary member, wherein the locking slider forms a first blocking arrangement configured to be clamped between the rotary member and an abutment structure when the locking slider is in the locking position and the rotary member is in a clamping rotational position lying between the closing rotational position and the release rotational position, wherein the locking member forms a second blocking arrangement configured to block the catch in at least one movement direction in the locking position of the locking member. ### Claim 13 A door latch for an electrical domestic appliance, the door latch comprising: a rotary member which is arranged to be rotationally movable in a rotation plane between a closing rotational position and a release rotational position wherein the rotary member is spring-biased in the direction towards the release rotational position and is configured to hold, in the closing rotational position, a closure member in order to keep a door of the domestic appliance closed and to release, in the release rotational position, the closure member in order for the door to open; a movably arranged catch for arresting engagement with the rotary member in its closing rotational position, wherein the rotary member is provided with a sliding guide for sliding engagement by the catch as the rotary member undergoes rotational movement, wherein the arresting engagement is defined by the catch engaging behind an arresting edge formed by the sliding guide, the arresting engagement preventing the rotary member from rotating back to the release rotational position, wherein the arresting engagement is releasable by rotating the rotary member beyond the closing rotational position thereby permitting the catch to spring away sideways from the arresting edge; a locking slider arranged to be movable between an unlocking position and a locking position, the locking slider configured to block a movable component of the door latch when the door is closed; and a carrier lever for the rotary member which is arranged to be displaceable against spring force out of a rest position into an emergency opening position, wherein the catch is arranged to be lifted out of arresting engagement with the rotary member by striking a stop element upon displacement of the carrier lever out of the rest position into the emergency opening position, wherein the stop element is formed on the locking slider and is moved in the locking position of the locking slider out of a standby position, in which the stop element is ready for striking by the catch. ### Claim 14 (depends on 13) The door latch according to claim 13 wherein the carrier lever is arranged to be displaceable pivotally. ### Claim 15 (depends on 1) The door latch according to claim 1, comprising an opening assembly having an actuator and an actuating element, movable by activation of the opening actuator, for acting on the catch in order to lift it out of arresting engagement with the rotary member. ### Claim 16 (depends on 15) The door latch according to claim 15, wherein the actuator is an electromagnetic actuator.