Patent ID: 9273499
Filing Date: 2016-03-01
CPC Classification: E05B,E05C,Y10T

Claim Text:
1. A locking device for restricting or admitting access into an area or space, wherein the locking device comprises a locking mechanism arranged to, in a first state, lock at least one locking element from movement in a locked position of the locking element, and, in a second state, allow movement of the locking element to an unlocked position, which locking mechanism is adapted to be connected with and to receive the motion for changing the state of the locking mechanism from an operating mechanism arranged to control the state of the locking device, wherein the locking device comprises a blocking mechanism connected between the locking mechanism and the operating mechanism to allow transfer of kinetic energy between the operating mechanism and the locking mechanism, the blocking mechanism comprising a first link pivotably fixed relative to the locking device in a first pivot point and connected with the operating mechanism in an operating mechanism connection point, a second link pivotably fixed relative to the locking device in a second pivot point and connected with the locking mechanism in a locking mechanism connection point, wherein the first and second pivot points are fixed to walls of the locking device, and a connection arranged between the first and the second links comprising an elongated guide and a sliding element movable along said guide for restricting the motion of first and second links and to allow transfer of kinetic energy between the first and second links, wherein the elongated guide and the sliding element are configured to block the locking mechanism from allowing a displacement of the locking element in response to an external force pressing the locking element in a direction from a locked state towards an unlocked state by the elongated guide and the sliding element comprising surfaces bear on each other when the locking element is in its locked state, wherein the surfaces are angled so that the external force pressing the locking element towards an unlocked state results in a force pressing the sliding element towards a stop provided in the elongated guide; wherein the locking device is configurable in a first mode and a second mode; wherein the first mode comprises a first-side engagement portion of an engagement member coupled to a first-side attachment portion on the first link; and wherein the second mode comprises a second-side engagement portion of the engagement member coupled to a second-side attachment portion on the first link; wherein said first mode is a fail-safe mode and is configured such that when the engagement member retracts, the locking element retracts into an unlocked state; and wherein said second mode is a fail-secure mode and is configured such that when the engagement member retracts, the locking element extends into a locked state.