Fluid reaction surfaces (i.e. – impellers) – Lashing between working members or external bracing – Connecting adjacent work surfaces
Patent
1977-06-08
1978-12-19
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Lashing between working members or external bracing
Connecting adjacent work surfaces
416212R, 416227A, 416231B, F04D 2936
Patent
active
041303814
ABSTRACT:
An impeller of an axial-flow fan comprises a hub which carries blades installed thereon with the aid of attachment fittings in the form of a swivelling base with an extension. Each of the swivelling bases supports at least two blades. The distance between the blades installed on a single base varies from 0.15 to 0.3 .alpha. where .alpha. is the angular distance between the pivots of the adjacent swivelling bases. The blades installed on a single base are rigidly secured thereto at one end and joined to each other by a connector at the other end, thus forming a rigid system.
REFERENCES:
patent: 1345055 (1920-06-01), Willour
patent: 2299592 (1942-10-01), Rober
patent: 2344266 (1944-03-01), Reissner
patent: 2514487 (1950-07-01), Griese
patent: 2576294 (1951-11-01), Geraci
patent: 3860361 (1975-01-01), McMurtry et al.
Levin Efim M.
Pomazan Oleg K.
Rudenko Valery A.
Sysoev Vladimir P.
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