Door closer

Details Door closer Door closer

1996-10-17

1999-01-26

Redman, Jerry

Movable or removable closures

With operator for movably mounted closure

Operating lever or link and closure swing about parallel axes

49340, E05F 1124

Patent

active

058626301

ABSTRACT:
A hydraulic servo door closer in which the fixed coupling between the energy storage mechanism and the door piston has been neutralized. The fixed coupling is neutralized by the use of spring pistons which are pressurized by the closing spring, in addition to the door pistons which are conventionally present. The additional pressure chambers which are thereby formed, compared to a conventional door closer, are connected to one another on one hand by fixed channels, but on the other hand by controlled channels and/or throttles for the damping medium which is present in the door closer.

REFERENCES:
patent: 3818637 (1974-06-01), Vivier
patent: 4040144 (1977-08-01), Lasier et al.
patent: 4231192 (1980-11-01), Daugiras et al.
patent: 4419786 (1983-12-01), Surko, Jr.
patent: 4653229 (1987-03-01), Feucht et al.

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