Door closer

Details Door closer Door closer

1977-12-05

1980-01-29

Schroeder, Werner H.

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Checks and closers

Liquid

188282, 188284, 188285, 16DIG20, 16DIG21, E05F 310

Patent

active

041853563

ABSTRACT:
A door closer is connected to a door. The movements of the door cause a piston member in the door closer to pump a pressure medium through a flow duct. There is also a flow limiting member influencing at least the speed of the opening movement of the door, and this flow limiting member cooperates with an adjustable activating element which, at a desired opening moment mechanically sets the elements of the flow limiting member in a position considerably increasing the flow resistance of the pressure medium. This brakes the movement of the piston member, and thus, also the movement of the door.

REFERENCES:
patent: 2332520 (1943-10-01), Lucht
patent: 3079629 (1963-03-01), Millard et al.
patent: 3160911 (1964-12-01), Morris et al.
patent: 3335452 (1967-08-01), Patriquin
patent: 3483585 (1969-12-01), Voster et al.
patent: 3497904 (1970-03-01), Merayo
patent: 3546734 (1970-12-01), Pollack et al.
patent: 3574886 (1971-04-01), Solovieff
patent: 3616881 (1971-11-01), Nicholls
patent: 3656632 (1972-04-01), Karakashian et al.
patent: 3797615 (1974-03-01), Stembridge
patent: 4048694 (1977-09-01), Newman et al.

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