CPC E05F 3/221 (2013.01) [E05F 1/10 (2013.01); E05Y 2201/41 (2013.01); E05Y 2201/418 (2013.01); E05Y 2201/716 (2013.01); E05Y 2201/722 (2013.01); E05Y 2900/132 (2013.01)] | 20 Claims |
1. A hold-open device configured for use with a door closer comprising a pinion operable to rotate each of a door-closing direction and a door-opening direction opposite the door-closing direction, the hold-open device comprising:
a shaft configured for rotational coupling with the pinion;
a ratchet wheel engaged with the shaft such that rotation of the shaft in the door-closing direction causes rotation of the ratchet wheel in a first rotational direction; and
a pawl operable to engage the ratchet wheel, the pawl having a holding position in which the pawl prevents rotation of the ratchet wheel in the first rotational direction to thereby prevent rotation of the shaft in the door-closing direction, the pawl having a release position in which the pawl permits movement of the ratchet wheel in the first rotational direction to thereby permit rotation of the shaft in the door-closing direction; and
wherein the ratchet wheel is configured to drive the pawl from the holding position which prevents rotation of the shaft in the door-closing direction to the release position in response to application of a threshold torque to the shaft to thereby permit rotation of the shaft in the door-closing direction.
|