Abstract: A cam type door closer includes a housing, a first piston set mounted in one side of the housing, a second piston set mounted in the other side of the housing, which includes a second piston movably mounted in a shaft hole of a first piston of the first piston set, a gap compensation device mounted in the second piston, a second spring having one end thereof stopped against the second piston and a security and sealing cap mounted in the housing to stop the other end of the second spring, and a drive shaft assembly rotatably mounted in a longitudinal passage of housing, which includes a shaft and an eccentric cam mounted on the shaft with one side thereof stopped against a roller of the first piston set and an opposite side thereof stopped against the second piston.

Abstract: An automatic return device for glass doors includes a hydraulic hinge assembly having a first base, a piston unit, a first drive axle and a first grip unit and a leaf positioning assembly having a second base, a slide seat unit, a second drive axle, and second grip unit. The first and second bases are connected to a doorframe. The piston unit and first drive axle are set in the first base. The first drive axle interacts with the piston unit to generate oil pressure. The first and second drive axles are connected to the first and second grip units that grip a glass door. The slide seat unit and the second drive axle are set in the second base. When the second drive axle pivots, the slide seat unit positions the second drive axle at a predetermined pivotal angle.

Abstract: The clamping assembly for a glass door includes an outer clamping body, an inner clamping body, an automatic homing mechanism and a positioning unit. An upper jaw for clamping the glass door is provided on the top of the outer clamping body, and a first side wall and a second side wall are recessedly formed at the bottom of the outer clamping body. A first lower jaw is formed between the first side wall and the second side wall. The inner clamping body is disposed in the first lower jaw. A second lower jaw is formed at the bottom of the inner clamping body. The automatic homing mechanism is disposed in the second lower jaw. The positioning unit penetrates the first side wall to abut against the first recess on the inner clamping body.