Abstract: Retention features are provided for joining at least two structural components in a fixtureless assembly system. A first structure including a groove may be configured to contain at least one adhesive, and a second structure may include a tongue configured to contact the at least one adhesive to join the first and second structures. The first structure may also include at least one window that receives electromagnetic (EM) radiation from an EM radiation source into the groove. The at least one adhesive is configured to cure at a first rate upon exposure to one of time or heating, and the at least one adhesive is configured to cure at a second rate faster than the first rate upon exposure to the EM radiation.

Abstract: A door closer having an elongate housing for mounting in a door leaf or door frame, the elongate housing having opposite forward and rear end parts, a plunger disposed in and movable along the housing, the plunger including a ferromagnetic material, a spring biasing element disposed in the housing and applying a first biasing force to bias the plunger inwardly of the housing and away from the forward end part and towards the rear end part, a tension member having a first end connected to the plunger and a second end connected to an anchor element assembly, the anchor element assembly comprising a mounting member for mounting in the other of the door leaf or door frame, the tension member and anchor element forming a tension assembly which extends through the forward end part.

Abstract: A door closer having an elongate housing for mounting in a door leaf or door frame, the elongate housing having opposite forward and rear end parts, a plunger disposed in and movable along the housing, the plunger including a ferromagnetic material, a spring biasing element disposed in the housing and applying a first biasing force to bias the plunger inwardly of the housing and away from the forward end part and towards the rear end part, a tension member having a first end connected to the plunger and a second end connected to an anchor element assembly, the anchor element assembly comprising a mounting member for mounting in the other of the door leaf or door frame, the tension member and anchor element forming a tension assembly which extends through the forward end part.