Doorknob attachment

Details Doorknob attachment Doorknob attachment

1979-06-25

1980-09-23

Kundrat, Andrew V.

Closure fasteners

Knobs

292DIG2, 16121, E05C 2100

Patent

active

042239311

ABSTRACT:
The invention provides a simple, inexpensive, efficient means of converting a standard doorknob into a lever operated doorknob which may be easily operated by the handicapped. The invention allows the use of existing hardware trim and can be retro-fitted to existing installations.

REFERENCES:
patent: D219861 (1971-02-01), Coffman
patent: 629999 (1899-08-01), Jacobs
patent: 1067575 (1913-07-01), Anderson
patent: 1570251 (1926-01-01), Hoagland
patent: 2756088 (1956-07-01), Sutter
patent: 2801122 (1957-07-01), Sutter
patent: 2808282 (1957-10-01), Peoples
patent: 2942909 (1960-05-01), Chase
patent: 3575453 (1971-04-01), Hohl
patent: 3827739 (1974-08-01), Overholser
patent: 4018465 (1977-04-01), Ramler

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