Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1974-11-14
1976-04-20
Steiner, Arthur J.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
416223R, 416234, 416243, F01D 514
Patent
active
039516113
ABSTRACT:
A one-piece blank for a propeller fan having a plurality of substantially identical blade portions extending outwardly from a central hub portion, each of the blade portions having leading and trailing edges which are joined at outer leading and trailing corners to an outer peripheral edge. The leading and trailing edges of adjacent leg portions define a narrow radially extending slot and the leading edges are shorter than the trailing edges. Each peripheral edge has a trailing portion extending from the trailing corner which is generally arcuate and a leading portion smoothly joined to the trailing portion and extending to the leading corner which generally follows an involute curve.
REFERENCES:
patent: 1688809 (1928-10-01), Gill
patent: 2023111 (1935-12-01), Alsing
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