Hold-open device for door closers

A door closer assembly, comprising:

• a closer body;
• a pinion rotatably mounted to the closer body, wherein the pinion is rotationally biased in a door-closing direction by a biasing torque and is operable to rotate in a door-opening direction opposite the door-closing direction;
• and
• a hold-open device comprising a first component operably engaged with the pinion such that rotation of the pinion is correlated with movement of the first component, the hold-open device comprising a second component operable to mechanically and movably engage the first component to prevent rotation of the pinion in the door-closing direction when a door-closing torque on the pinion is less than a threshold torque, and to permit rotation of the pinion in the door-closing direction when the door-closing torque on the pinion is greater than the threshold torque.

A door closer assembly, comprising:

• a closer body;
• a pinion rotatably mounted to the closer body, wherein the pinion is rotationally biased in a door-closing direction by a biasing torque and is operable to rotate in a door-opening direction opposite the door-closing direction;
• and
• a hold-open device comprising a first component operably engaged with the pinion such that rotation of the pinion is correlated with movement of the first component, the hold-open device comprising a second component operable to engage the first component to prevent rotation of the pinion in the door-closing direction when a door-closing torque on the pinion is less than a threshold torque, and to permit rotation of the pinion in the door-closing direction when the door-closing torque on the pinion is greater than the threshold torque;
• and
• wherein the hold-open device is separable from the closer body and includes a case releasably coupled to the closer body.

A door closer assembly, comprising:

• a closer body;
• a pinion rotatably mounted to the closer body, wherein the pinion is rotationally biased in a door-closing direction by a biasing torque and is operable to rotate in a door-opening direction opposite the door-closing direction;
• and
• a hold-open device configured to prevent rotation of the pinion in the door-closing direction when a door-closing torque on the pinion is less than a threshold torque, and to permit rotation of the pinion in the door-closing direction when the door-closing torque on the pinion is greater than the threshold torque;
• and
• wherein the hold-open device comprises:
• a ratchet mechanism engaged with the pinion such that rotation of the pinion in the door-closing direction is correlated with movement of the ratchet mechanism in a first direction;
• and
• a pawl operable to engage the ratchet wheel to selectively prevent movement of the ratchet mechanism in the first direction to thereby prevent rotation of the pinion in the door-closing direction.

A hold-open device configured for use with a door closer comprising a body and a pinion that is rotatably mounted to the body and rotationally biased in a door-closing direction by a biasing torque, the hold-open device comprising:

• a shaft configured to rotationally couple with the pinion;
• a first component operably engaged with the pinion such that rotation of the pinion is correlated with movement of the first component;
• a second component operable to engage the first component to selectively permit and prevent rotation of the pinion;
• and
• a selector operable to engage the second component to transition the hold-open device between an active mode and an idle mode;
• wherein the hold-open device in the active mode is configured to selectively prevent rotation of the shaft in the door-closing direction to thereby prevent rotation of the pinion in the door-closing direction;
• and
• wherein the hold-open device in the idle mode is inoperable to prevent rotation of the shaft such that the pinion is operable to rotate in the door-closing direction.