Back to results
US 5,850,671 AGranted
Door closer
AssigneeGeze GmbH
InventorUwe Kaser
Life of this patent
Estimating the term…
Abstract
A hydraulically damped door closer is described which has a relatively weak closer spring (3c) and stronger back-up closer springs (3a, 3b). If, after a predetermined time period, the door does not arrive in the closed position under the effect of the closer spring (3c), the back-up closer springs (3a, 3b) are connected for the closing. Their connection is therefore controlled by way of a time function element, which represents a simple and, at the same time, reliable control.
Claims21
Door closer for a door having a door closure, comprising:
- an energy accumulator for closing the door closure, the energy accumulator being at least partially charged by manual opening of the door closure, and being at least partially discharged to effect closing of the door closure;
- the energy accumulator comprising a first partial energy accumulator and a second partial energy accumulator, door closing taking place by discharge of the first partial energy accumulator, and the second partial energy accumulator;
- and
- a time function means for controlling discharge of the second partial energy accumulator whereby it is ensured that, after the opening, the door closes completely within a predetermined time, said time function means including
- means for automatically initiating discharge of the second partial energy accumulator if the closed position is not reached within a predetermined time period, and for automatically stopping discharge of the second partial energy accumulator as soon as a closed position is reached;
- and
- means for controlling discharge of the second partial energy accumulator such that during the closing operation, the second partial energy accumulator discharges continuously but more slowly than the first partial energy accumulator, with discharge phases of a different discharge speed.
4 more elements
A device for automatically closing a door, comprising
- a first energy accumulator which is at least partially charged by a manual opening of said door;
- and
- a second energy accumulator which is at least partially charged by a manual opening of said door, both of said first and second energy accumulators being coupled to each other for discharging stored energy to close said door;
- wherein said second energy accumulator includes a time delay element which delays for a predeterminable time period an application of energy stored therein to close said door.
1 more element
Dependencies are inferred from the claim text.