Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Sectional – staged or nonrigid working member
Patent
1994-05-06
1995-10-31
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Sectional, staged or nonrigid working member
415 5, 415205, D23413, F01D 500
Patent
active
054624070
ABSTRACT:
A ceiling fan blade assembly which includes an annular hub structured for fixed securement to a fan motor for rotation therewith, and a pair of blade frames extending radially outwardly from opposite sides of the hub. The hub includes a base and a sidewall defining a cavity. Each blade frame is of a generally arcuate shape, and includes a flexible elongate tube that is connected to the hub by a joint. Each blade frame also includes a portion of a single continuous cord that extends from the hub cavity internally through the joint and elongate tube, and extends from the end of the elongate tube exteriorly back to the hub, where it enters the hub cavity through a pitch adjusting member connected to the hub. The single continuous cord extends throughout the assembly and between the blade frames such that the arcuate shape of both blade frames can be selectively varied in a substantially uniform manner by adjusting the tension in the cord. In addition, the pitch of the blades can be selectively fixed by adjusting the positioning of the joints and pitch adjusting members relative to the hub during the assembly of the frames. The assembly also includes a removable blade frame cover attached to each blade frame by conventional fastening means, and may further include a fragrance releasing means disposed within the assembly.
REFERENCES:
patent: D321935 (1991-11-01), Ignon
patent: 991331 (1911-05-01), Lawrence
patent: 1634393 (1927-07-01), Barton
patent: 2319286 (1943-05-01), Andresen
patent: 5022819 (1991-06-01), Murcin et al.
patent: 5110261 (1992-05-01), Tunkin
Look Edward K.
Sgantzos Mark
Shapiro Jeffrey S.
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