Abstract: A clamp-action ratchet fastening nut assembly comprising, a body having a proximal end and a distal end, a hollow cap connected to the body, an annular collar within the cap and defining an interior camming surface, a plurality of threaded axial nut sections disposed in the hollow cap in engagement with the annular collar, and configured for movement between a radially closed position in which the plurality of threaded axial nut sections form an axial bore having a continuous internal thread, and a radially open position, and a spring positioned in the hollow cap and configured to bias the plurality of threaded axial nut sections proximally against the interior camming surface of the annular collar, whereby the plurality of threaded axial nut sections is urged from the radially open position to the radially closed position.

Abstract: A push bar door exit device includes a latch actuation assembly configured to be installed in a door and including a linearly-movable latch retractor; a door latch operatively coupled to the latch retractor so as to be moved from a latched position to an unlatched position by the linear movement of the latch retractor; and a push bar mechanism configured for being mounted on the door and including a linearly-movable push bar operatively coupled to the latch actuation assembly so as to translate a linear motion of the push bar into the linear movement of the latch retractor.

Abstract: A clamp-action ratchet fastening nut assembly comprising, a body having a proximal end and a distal end, a hollow cap connected to the body, an annular collar within the cap and defining an interior camming surface, a plurality of threaded axial nut sections disposed in the hollow cap in engagement with the annular collar, and configured for movement between a radially closed position in which the plurality of threaded axial nut sections form an axial bore having a continuous internal thread, and a radially open position, and a spring positioned in the hollow cap and configured to bias the plurality of threaded axial nut sections proximally against the interior camming surface of the annular collar, whereby the plurality of threaded axial nut sections is urged from the radially open position to the radially closed position.

Abstract: A push bar exit device includes a longitudinal housing configured to be mounted on an inside surface of a door, the housing having an interior, a head end, and an open tail end. A length-adjustment tailpiece is slidably installed in the open tail end of the housing. The tailpiece may be slidable continuously within the housing to provide a continuous length adjustment, or it may be incrementally adjustably longitudinally by selective engagement with any of a plurality of detent pairs at discrete positions in the housing from the open tail end, whereby the tailpiece is movable incrementally into any of the discrete longitudinal positions defined by the detent pairs.

Abstract: A door-closing device connectable by a linkage assembly between a door and a door frame includes a piston linearly movable between a door-open position and a door-closed position toward which the piston is biased. The piston has first and second sets of rack teeth disposed thereon. A pinion gear is mounted on a rotatable shaft coupled to the linkage assembly, the pinion gear having a first set of gear teeth along a first circumferential portion for engagement with the first set of rack teeth, and a second set of gear teeth along a second circumferential portion for engagement with the second set of rack teeth, the engagement between the first set of pinion gear teeth and the first set of rack teeth providing a first gear ratio, and the engagement of the second set of pinion gear teeth with the second set of rack teeth providing a second gear ratio.

Abstract: A door locking apparatus and system includes a locking assembly with a latch movable between an unlocked position and a locked position; a position detector configured to determine whether the latch is in the unlocked position or in the locked position and to generate a position signal having a first value when the latch is in the first position and a second value when the latch is in the second position; and a transmitter configured to receive the position signal and to transmit a wireless signal indicative of the value of the position signal. The wireless signal is receivable by a remote electronic device to allow for remote monitoring of the status of the locking assembly as either locked or unlocked depending on the value of the position signal indicated by the wireless signal.