US 12,305,836 B2
Light fixture, in particular a light fixture for stage
Aris Quadri, Seriate (IT); Davide Ferrati, Brembate (IT); and Alberto Alfier, Vedelago (IT)
Assigned to CLAY PAKY S.R.L., Seriate (IT)
Filed by CLAY PAKY S.R.L., Seriate (IT)
Filed on Apr. 19, 2024, as Appl. No. 18/640,176.
Claims priority of application No. 102023000008043 (IT), filed on Apr. 24, 2023.
Prior Publication US 2024/0353088 A1, Oct. 24, 2024
Int. Cl. F21V 21/15 (2006.01); F21V 21/30 (2006.01); F21W 131/406 (2006.01)
CPC F21V 21/15 (2013.01) [F21V 21/30 (2013.01); F21W 2131/406 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A light fixture, in particular a light fixture for a stage; wherein the light fixture (1) comprises:
a support (2) comprising a base (3) and a fork (4) with two arms (9), wherein the fork (4) is coupled to the base (3) in a rotating manner around a first axis (PAN);
a head (5) housing at least one lighting device (21) and coupled to the arms (9) of the fork (4) in a rotating manner around a second axis (TILT);
a first motor (6) and a second motor (7) powered by electricity to respectively drive the rotation of the fork (4) relative to the base (3) around the first axis (PAN) and the rotation of the head (5) relative to the fork (4) around the second axis (TILT);
characterized in that the light fixture (1) moreover comprises:
at least one braking device (8) configured so that in the absence of a power supply to at least one of the first motor (6) and the second motor (7) slows down until stopping the rotation of at least one of the fork (4) relative to the base (3) and the rotation of the head (5) relative to the fork (4);
wherein the light fixture comprises:
a first pin (10) along the first axis (PAN) integral with the fork (4) for the rotation of the fork (4) relative to the base (3);
a second pin (11) along the second axis (TILT) integral with the head (5) for the rotation of the head (5) relative to the fork (4);
wherein the at least one braking device (8) is a friction braking device acting on at least one of the first (10) and the second pin (11) that can convert the kinetic energy of at least one of the head and the fork into frictional heat;
wherein each friction braking device comprises:
at least one friction disc (12) made of a material having a high friction coefficient and coupled integrally or by contact to the corresponding pin (11);
a braking disc (13) coupled integrally or by contact to at least one friction disc (12) and being separate from the pin (11);
a selective locking device (14) of the braking disc (13); the selective locking device being configured to lock the braking disc (13) relative to the corresponding pin (11) in the absence of a power supply to the corresponding motor (7) so that:
during the power supply, the braking disc (13) is free and set into rotation integral with the pin (11) by at least one friction disc (12);
in the absence of a power supply, the braking disc (13) is locked and the at least one friction disc (12) by sliding on the braking disc (13) or support disc (23) generates a friction force that slows down the corresponding pin (11) until stopping.