Patent application number | Description | Published |
20080209811 | Door Drive Mechanism, Especially Revolving Door Drive Mechanism - A door operator includes a housing; a hydraulic compartment; a pressure compartment; a drive unit disposed in the housing and coupleable to a door via an output shaft, the drive unit being associated with the hydraulic compartment; a hydraulic pump in hydraulic connection with the hydraulic compartment and the pressure compartment; a motor in driving relationship with the hydraulic pump; and a spring force accumulator disposed in the housing. The spring force accumulator is associated with the pressure compartment and coupled to the drive unit. | 09-04-2008 |
20080222957 | Door Drive Mechanism, Especially Revolving Door Drive Mechanism - A door operator includes a housing; a hydraulic compartment providing a reservoir volume; a sealed pressure compartment; a drive unit disposed in the housing and coupleable to a door via an output shaft; a hydraulic pump in hydraulic connection with the hydraulic compartment and the sealed pressure compartment; a motor in driving relationship with the hydraulic pump; and a spring force accumulator disposed in the housing. The spring force accumulator is associated with the sealed pressure compartment and coupled to the drive unit. | 09-18-2008 |
20120233810 | Door Closer Having a Magnetic Distribution Valve - A door closer, in particular a hinge door closer, including a locking function or free-swing function, having a door closer housing, an output shaft to be connected to a door, a piston assembly connected to the output shaft and guided in the door closer housing, a closer spring, a piston rod adapted to connect the piston assembly to the closer spring, a hydraulic lock compartment adapted to lock the closer spring, and solenoid control valve, in particular a 3/2-solenoid control valve. A closure damping compartment is formed between the door closer housing and the piston assembly on a side of the piston assembly facing away from the piston rod, and wherein the solenoid control valve controls at least the pressures in the closure damping compartment and in the lock compartment. | 09-20-2012 |
20120233811 | DOOR CLOSER - A door closer, in particular a hinge door closer, including a locking function or free-swing function, having a door closer housing, an output shaft to be connected to a door, a piston assembly connected to the output shaft and guided in the door closer housing, a closer spring, a piston rod adapted to connect the piston assembly to the closer spring, a hydraulic lock compartment adapted to lock the closer spring, and in particular a free-swing assembly which is adapted to enable a translational motion of the piston assembly decoupled from the closer spring when the closer spring is locked. | 09-20-2012 |
20120233812 | Door Closer With Free-Swing Function - A door closer, in particular a hinge door closer, having a free-swing function, including a door closer housing, an output shaft to be connected to a door, a piston assembly connected to the output shaft and guided in the door closer housing, a closer spring, a piston rod adapted to connect the piston assembly to the closer spring, a free-swing assembly which is adapted to enable a translational motion of the piston assembly decoupled from the closer spring when the closer spring is locked, and which is embodied as a sliding-coupling which exclusively transmits compressive forces between the closer spring and the piston assembly, and a hydraulic lock compartment adapted to lock the closer spring. | 09-20-2012 |
20120240351 | DOOR CLOSER COMPRISING DEVICE FOR PREVENTING A SPRING-BACK - A door closer, in particular a hinge door closer, including a locking function or free-swing function, having a door closer housing, an output shaft to be connected to a door, a piston assembly connected to the output shaft and guided in the door closer housing, a closer spring, a piston rod adapted to connect the piston assembly to the closer spring, a hydraulic lock compartment adapted to lock the closer spring, and a spring-loaded check valve arranged between the lock compartment and a space becoming smaller during the opening process of the door, in particular an accommodating space for the closer spring. The spring-loaded check valve locks toward the space becoming smaller. | 09-27-2012 |
20120272475 | Door Closer Comprising Additional Closing Spring - A door closer, in particular a hinge door closer, including a free-swing function, having a door closer housing, an output shaft to be connected to a door, a piston assembly connected to the output shaft and guided in the door closer housing, a closer spring, a piston rod adapted to connect the piston assembly to the closer spring, a free-swing assembly which is adapted to enable a translational motion of the piston assembly decoupled from the closer spring when the closer spring is locked, and a hydraulic lock compartment adapted to lock the closer spring. An additional closer spring acts on the piston assembly, in order to slightly load the piston assembly toward the closing direction when in free-swing mode. The additional closer spring is weaker than the closer spring. | 11-01-2012 |
20130000074 | Door Closer Comprising Cam Drive - A door closer including a free-swing function, including a door closer housing, an output shaft connected to a door, a piston assembly connected to the output shaft and guided in the door closer housing, a closer spring, a piston rod adapted to connect the piston assembly to the closer spring, a free-swing assembly adapted to enable a translational motion of the piston assembly decoupled from the closer spring when the closer spring is locked, and a hydraulic lock compartment adapted to lock the closer spring. The output shaft is a cam-shaped rolling contour, in particular a cam disc, and the piston assembly includes at least one cam roller abutting on the rolling contour. | 01-03-2013 |
20130020515 | Hydraulic Solenoid Distribution Valve - A solenoid distribution valve has a housing, a valve chamber integrated in the housing and a first valve seat bore for connection to a first line, a second valve seat bore as a connection to a second line and a clear opening to a third line, an electromagnet, and a valve lifter that can be moved by the electromagnet. A valve lifter within the valve chamber includes a first sealing surface facing the first valve seat bore and a second sealing surface facing the second valve seat bore that are optionally closable. The valve lifter extends out of the valve chamber through the second valve seat bore to the electromagnet. When the second valve seat bore is closed, the valve lifter is drawn, via a differential pressure ratio, by the pressure in the second line, into the second valve seat bore. | 01-24-2013 |