Overhead concealed door closer, mechanically, hydraulically oper

Details Overhead concealed door closer, mechanically, hydraulically oper Overhead concealed door closer, mechanically, hydraulically oper

1992-12-23

1993-12-28

Larson, Lowell A.

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

Checks and closers

Liquid

16 62, E05F 304

Patent

active

052727874

ABSTRACT:
An overhead concealed door closer, hydraulicly operated, within a narrow housing case which fits within a header. The housing case has a step radius design along one side and the aperture for the pinion is off-center toward the step radius design side. Hydraulics within the housing case provide a back check, delayed closing, controlled closing, and latch closing. A rack slide is provided with a broadpoint slot so that a broadpoint extending from a pinion can slide through the broadpoint slot and into the broadpoint slot housing well of the housing case.

REFERENCES:
patent: 2460364 (1949-02-01), Stronach
patent: 3040372 (1962-06-01), Ellis
patent: 3087720 (1963-04-01), Catlett
patent: 3135991 (1964-06-01), Ellis
patent: 3137888 (1964-06-01), Blom
patent: 3156001 (1964-11-01), Schmid
patent: 3156002 (1964-11-01), Schmid
patent: 3255482 (1966-06-01), Flint
patent: 4483043 (1984-11-01), Tillmann
patent: 4785493 (1988-11-01), Tillmann et al.

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