Fluid reaction surfaces (i.e. – impellers) – With weight-balancing means – Self-shifting or selectively adjustable mass
Patent
1997-12-18
1999-11-23
Ryznic, John E.
Fluid reaction surfaces (i.e., impellers)
With weight-balancing means
Self-shifting or selectively adjustable mass
416 62, B63H 100, B64C 1100, F03B 312
Patent
active
059889780
ABSTRACT:
A method and apparatus are provided for balancing a ceiling fan suspended from the ceiling, with the fan having a plurality of blades rotatable about a centerline axis of the fan. The method comprises the steps of attaching at least one test clip to each one of an adjacent pair of the fan blades with the fan stationary, operating the fan on high speed in a downdraft direction with the test clips attached and observing the fan wobble. These steps are repeated for each adjacent pair of blades to identify the pair of blades producing the minimum wobble. The method also includes the steps of determining the optimum radial position of each of the test clips, with respect to wobble, and replacing each clip with a balance weight secured to the corresponding blade. A test clip according to the present invention may be used, with the clip comprising upper and lower members, each having a generally D-shaped configuration, and a connecting member interconnecting the upper and lower members. When this clip is used, it is releasably attached to one of the blades with an arcuate edge portion of each of the upper and lower members extending toward the leading edge of the blade and facing into the airflow passing over the blade and the clip. The shape and placement of the clip on the blade minimizes the airflow interruption, and associated vibrations, due to the presence of the clip.
REFERENCES:
patent: 2362842 (1944-11-01), Mueller
patent: 2366795 (1945-01-01), Lamoreaux
patent: 2426400 (1947-08-01), Lampton et al.
patent: 2720013 (1955-10-01), Clarke
patent: 4305292 (1981-12-01), Felter
patent: 4753573 (1988-06-01), McKnight
patent: 4840650 (1989-06-01), Matherne
patent: 5219454 (1993-06-01), Class
patent: 5256037 (1993-10-01), Chatelain
patent: 5380156 (1995-01-01), Iacovino
patent: 5383765 (1995-01-01), Baxter et al.
patent: 5470203 (1995-11-01), Mori et al.
patent: 5470205 (1995-11-01), Conklin, Jr.
patent: 5593281 (1997-01-01), Tai
Hunter Fan Company
Ryznic John E.
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