US 12,270,228 B2
Catch mechanism for a locking device
Lars Jensen, Surahammar (SE)
Assigned to STENDALS EL AB, Västerås (SE)
Appl. No. 17/610,307
Filed by STENDALS EL AB, Västerås (SE)
PCT Filed May 14, 2020, PCT No. PCT/SE2020/050500
§ 371(c)(1), (2) Date Nov. 10, 2021,
PCT Pub. No. WO2020/236069, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 1950590-8 (SE), filed on May 17, 2019.
Prior Publication US 2022/0243498 A1, Aug. 4, 2022
Int. Cl. E05B 17/20 (2006.01); E05B 15/00 (2006.01); E05B 47/00 (2006.01); E05B 47/02 (2006.01); E05B 47/06 (2006.01)
CPC E05B 17/2034 (2013.01) [E05B 15/004 (2013.01); E05B 47/0012 (2013.01); E05B 47/023 (2013.01); E05B 47/0607 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A locking device (1) comprising
a hook bolt (61) arranged on a bolt pivot (611) and comprising hook bolt connectors (612); and
a catch mechanism (10, 10′) for blocking a bolt to prevent unauthorized opening of a door, comprising
a follower (23) for operating the hook bolt (61) between a locked state in which the hook bolt is pivotally extended and an unlocked state in which the hook bolt is pivotally retracted, said follower (23) comprising follower connectors (231) pivotally engaging the hook bolt connectors (612) such that said hook bolt (61) and follower (23) are mounted to pivot in opposite directions from one another;
a catch (22) configured to only block the follower (23) for preventing movement of the hook bolt in the locked state and not directly contact the hook bolt (61); and
a control member (21) for operating the follower (23) and the catch (22);
wherein
the catch mechanism (10, 10′) further comprises
a first connector (71) for connecting the control member (21) to the catch (22) and operating the catch, the first connector (71) comprising a first contact surface (711) on the control member and a second contact surface (712) on the catch (22), and
a second connector (81) for connecting the control member (21) to the follower (23) and operating the follower (23) during movement of the control member (21) along a path, the second connector (81) comprises an opening (812) and a protrusion (811) extending into the opening (812), the opening (812) being larger than the protrusion (811) so that a play is formed in which the protrusion (811) is able to move without contacting a wall of the opening (812), and one of the opening (812) and the protrusion (811) is arranged on the control member (21) and the other is arranged on the follower (23), and
the second connector (81) comprises the play so that the control member (21) at a first portion of the path operates only the catch (22) for moving from a locking position to an open position for unblocking the follower (23), and the control member (21) at a second portion of said path operates the follower (23) for moving the hook bolt (61) from the locked state to the unlocked state, and additionally comprising
a cylinder (31) arranged to transfer movement to the control member (21), said cylinder (31) having teeth (311),
a wheel (51) having teeth (511) arranged to cooperate with the cylinder teeth (311), and
said control member (21) having rack (211) with teeth arranged to engage the teeth (511) of the wheel (51),
such that rotary movement of the cylinder (31) is transferred into linear movement of the control member (21) to lock or unlock the catch mechanism (10).