US 11,884,514 B2
Safety brake device and safety brake method
Hans Blochle, Stans (CH); Adrian Steiner, Inwil (CH); Daniel Meierhans, Sins (CH); and Julian Stahli, Meggen (CH)
Assigned to INVENTIO AG, Hergiswil (CH)
Appl. No. 17/593,211
Filed by Inventio AG, Hergiswil (CH)
PCT Filed Mar. 13, 2020, PCT No. PCT/EP2020/056899
§ 371(c)(1), (2) Date Feb. 28, 2022,
PCT Pub. No. WO2020/187757, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 202019101479.2 (DE), filed on Mar. 15, 2019.
Prior Publication US 2022/0177272 A1, Jun. 9, 2022
Int. Cl. B66B 5/22 (2006.01)
CPC B66B 5/22 (2013.01) 17 Claims
OG exemplary drawing
 
1. A safety brake device for an elevator, the elevator having an upright guide rail upon which the safety brake acts, the safety brake device comprising:
a housing having braking elements arranged on both sides of the guide rail and the braking elements being movable along the guide rail relative to the housing;
a safety restraint on both sides of the guide rail arranged between the housing and the braking elements;
a clampable and lockable actuating device for the braking elements, the actuating device unlocking and unclamping from an actuating device initial position in response to a triggering event and thereby bringing the braking elements into braking engagement with the guide rail;
wherein the actuating device, when unclamped, develops a feed force and a feed movement bringing the braking elements on both sides of the guide rail into engagement with the guide rail from a laterally distanced initial position of the braking elements;
wherein the braking elements, when engaged with the guide rail, are entrained by frictional contact on the guide rail and enter the safety restraint; and
wherein the actuating device is moved back into the actuating device initial position as the braking elements enter the safety restraint and is clamped and locked in the actuating device initial position by the braking elements located in the safety restraint.