Title: Doorknob attachment

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.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Neary, Ralph E. (San Francisco, CA, US)

Application Number: 051612
Filing Date: 1979-06-25
Publication_date: 1980-09-23
Assignee: Schlage Lock Company (San Francisco, CA)
Primary Class(es): 292/347 16/413, 16/DIG30, 292/DIG2
Other Classes:
US Patent Ref:

D219861	Feb, 1971	Coffman	D8/308.
629999	Aug, 1899	Jacobs	74/557.
1067575	Jul, 1913	Anderson	74/557.
1570251	Jan, 1926	Hoagland	74/557.
2756088	Jul, 1956	Sutter	292/347.
2801122	Jul, 1957	Sutter	292/347.
2808282	Oct, 1957	Peoples	292/DIG.
2942909	May, 1960	Chase	292/347.
3575453	Apr, 1971	Hohl	292/347.
3827739	Aug, 1974	Overholser	292/347.
4018465	Apr, 1977	Ramler	74/557.

Other Refs:
Primary Examiner: Kundrat, Andrew V.
Assistant Examiner:
Attorney: Vliet; Walter C.