Drives for doors or windows

Abstract

The invention relates to a drive device for a leaf of a door or window, comprising a housing and a piston-cylinder unit, the piston-cylinder unit of which is movably supported by means of a piston forming a pressure chamber and a pressure-free chamber In the cylinder of the piston-cylinder unit, hydraulic medium is transferable between a pressure chamber and an unpressure chamber during corresponding closing and opening movements of the piston. The housing is provided with inflow and / or outflow holes for the hydraulic medium to be diverted which are offset relative to each other both along the axis of the cylinder of the piston-cylinder unit and along its circumference, which are closed at the corresponding closure of the piston of the piston-cylinder unit Or being driven over and closed or opened during the opening movement. A regulating valve is also provided, which has a valve section which is adjustable in the direction of the axis of the valve bore. The inlet and / or outlet openings of the housing open into the valve openings. The control valve interacts with the inflow and / or outflow openings so that the different inflow and / or outflow openings of the housing can be closed or the different inflow and / or outflow openings can be opened.

Description

technical field [0001] The invention relates to a drive device for a leaf of a door, window or the like, said drive device having a housing and a piston-cylinder unit, the piston-cylinder unit being loaded by a spring unit and connected to a driven shaft The cooperating piston is movably mounted in the cylinder of the piston-cylinder unit forming a pressure chamber and a pressureless chamber, in which hydraulic medium flows during the respective closing and opening movements of the piston Transferable to and from the pressure-free chamber. Background technique [0002] Hydraulic drives for doors or windows are well known and bring about an autonomous closing of the door or window leaf, wherein, in the case of a drive for the door leaf or door closer, not only the movement of the door panel into the door frame but also the locking of the door is ensured The latch drops into the locking plate. Furthermore, a mechanical energy accumulator, such as in particular a spring unit,...

AI Technical Summary

Problems solved by technology

[0003] In addition, a disadvantage of conventional drives such as in particular door closers of the type mentioned at the outset is the activation range or initiation of certain hydraulic functions such as closing delay, opening damping, end stops and / or similar functions. The action point (Einsatzpunkt) is fixedly predefined in the structure

However, if the door can be opened over a door opening angle of more than 180°, for example, the opening damping starts too early in the known drive, thereby causing difficulties for the operation of the door.

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