Title: Lightweight fan

Abstract: A fan blade, secured to an arm of the fan, extends radially outwardly beyond the arm and is secured to the arm by a plurality of rivets, a continuous circular rib being formed about the radially outermost rivet, the rib comprising on one side of the blade a groove having a depth and a cross-sectional radius equal to the blade material thickness.

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Inventors: New, Gordon R. A. (Chatham, CA, US)
Curry, William G. (Chatham, CA, US)

Application Number: 718789
Filing Date: 1976-08-30
Publication_date: 1977-09-27
Assignee: Fram Corporation (East Providence, RI)
Primary Class(es): 416/132A 416/210R, 416/DIG3
Other Classes:
US Patent Ref:

1313598	Aug, 1919	Ingells	416/DIG.
1352848	Sep, 1920	Stanyo	416/DIG.
1634554	Jul, 1927	Pajalic	416/DIG.
2794509	Jun, 1957	Mix	416/DIG.
2912159	Nov, 1959	Granger et al.	416/DIG.
2965180	Dec, 1960	Killam	416/DIG.
3628888	Dec, 1971	Wooden	416/243.

Other Refs: 393,131

Jun, 1933	UK

Primary Examiner: Powell, Jr., Everette A.
Assistant Examiner:
Attorney: