Method and apparatus for balancing a ceiling fan — Hunter Fan Company

Method and apparatus for balancing a ceiling fan - Hunter Fan Company

1. A method for balancing a ceiling fan suspended from a ceiling, the ceiling fan having a plurality of rotatable fan blades, said method comprising the following steps:

acquiring at least two test clips;

releasably attaching at least one of the test clips to each one of an adjacent pair of the fan blades, with the ceiling fan being stationary;

operating the ceiling fan on high speed in a downdraft direction with the test clips attached to the adjacent pair of the fan blades;

observing the ceiling fan wobble during said operating step;

repeating said releasably attaching, operating and observing steps for each remaining adjacent pair of the fan blades;

identifying the adjacent pair of the fan blades producing the minimum ceiling fan wobble;

determining the optimum radial position of each of the test clips, with respect to ceiling fan wobble, on each blade of the identified adjacent pair of the fan blades;

replacing each of the test clips with a balance weight secured to the corresponding one of the identified adjacent pair of fan blades at the optimum radial position determined in said determining step.

2. The method as recited in claim 1, wherein said attaching step comprises the step of:

releasably attaching at least one test clip proximate a trailing edge of each one of the adjacent pair of the fan blades.

3. The method as recited in claim 1, wherein said attaching step comprises the steps of:

releasably attaching a first test clip proximate a trailing edge of one of the adjacent pair of the fan blades;

releasably attaching a second test clip proximate a trailing edge of the other of the adjacent pair of the fan blades.

4. The method as recited in claim 3, wherein said attaching step further comprises the steps of:

locating the first test clip at a mid-span position along the trailing edge of one of the adjacent pair of the fan blades;

locating the second test clip at a mid-span position along the trailing edge of the other of the adjacent pair of the fan blades.

5. The method as recited in claim 3, wherein said determining step comprises the steps of:

releasably attaching the first test clip to one of the identified adjacent pair of the fan blades at a first radial position proximate a trailing edge of the blade;

releasably attaching the second test clip to the other of the identified adjacent pair of the fan blades at a first radial position proximate a trailing edge of the blade;

repeating said operating and observing steps for each of a plurality of radial positions of the first test clip proximate the trailing edge of the one of the identified adjacent pair of the fan blades while leaving the second test clip at the first radial position on the other of the identified adjacent pair of the fan blades;

identifying the optimum radial position of the first test clip resulting in the minimum ceiling fan wobble;

repositioning the second test clip to at least one additional radial position proximate the trailing edge of the other of the identified adjacent pair of the fan blades;

repeating said operating and observing steps for each of the additional radial positions of the second test clip while leaving the first test clip at the optimum radial position resulting in the minimum ceiling fan wobble;

identifying the optimum radial position of the second test clip resulting in the minimum ceiling fan wobble.

6. The method as recited in claim 1, wherein said replacing step comprises the step of:

providing a plurality of the balance weights, each having a weight substantially equal to a weight of one of the test clips.

7. The method as recited in claim 1, wherein said replacing step comprises the step of:

adhering each of the balance weights to a top surface of one of the identified adjacent pair of the fan blades at the optimum radial position on each of the blades resulting in the minimum ceiling fan wobble.

8. A method for balancing a ceiling fan suspended from a ceiling, the ceiling fan having a plurality of rotatable fan blades, said method comprising the following steps:

releasably attaching at least one test clip to each one of an adjacent pair of the fan blades, with the ceiling fan being stationary;

operating the ceiling fan on high speed in a downdraft direction with the test clips attached to the adjacent pair of the fan blades;

observing the ceiling fan wobble during said operating step;

repeating said releasably attaching, operating and observing steps for each remaining adjacent pair of the fan blades;

identifying the adjacent pair of the fan blades producing the minimum ceiling fan wobble;

determining the optimum radial position of each of the test clips, with respect to ceiling fan wobble, on each blade of the identified adjacent pair of the fan blades;

replacing each of the test clips with a balance weight secured to the corresponding one of the identified adjacent pair of fan blades at the optimum radial position determined in said determining step;

wherein said attaching step comprises the steps of:

releasably attaching a first test clip proximate a trailing edge of one of the adjacent pair of the fan blades; and

releasably attaching a second test clip proximate a trailing edge of the other of the adjacent pair of the fan blades;

wherein said first and second test clips each include an upper member, a lower member and a connecting member interconnecting the upper and lower members, the upper and lower members each having a peripheral edge including an arcuate portion and a substantially straight portion, wherein:

said step of releasably attaching the first test clip includes the step of positioning the first test clip with the substantially straight portions of the edges of the upper and lower members of the first test clip being substantially parallel with the trailing edge, and the arcuate portions of the edges of the upper and lower members of the first test clip extending toward the leading edge, of the one of the adjacent pair of the fan blades;

said step of releasably attaching the second test clip includes the step of positioning the second test clip with the substantially straight portions of the edges of the upper and lower members of the second test clip being substantially parallel with the trailing edge, and the arcuate portions of the edges of the upper and lower members of the second test clip extending toward the leading edge, of the other of the adjacent pair of the fan blades.

Method and apparatus for balancing a ceiling fan - Hunter Fan Company

9. A test clip for use in balancing a ceiling fan suspended from a ceiling, the ceiling fan having a plurality of rotatable fan blades, each blade having a thickness, a leading edge and a trailing edge, said test clip comprising:

a generally D-shaped upper member having an upper surface, a lower surface and a peripheral edge extending between said upper and lower surfaces;

a generally D-shaped lower member having an upper surface, a lower surface and a peripheral edge extending between said upper and lower surfaces;

a connecting member interconnecting said upper and lower members, said connecting member defining a free-state spacing between said lower surface of said upper member and said upper surface of said lower member;

said upper and lower members and said connecting member being made of an elastic material and configured to permit said clip to be releasably attached to one of the blades proximate one of the leading and trailing edges of the blade.

10. The test clip as recited in claim 9, wherein:

said free-state spacing has a minimum value which is less than the thickness of each of the blades whereby said upper and lower members apply a clamp load to the one of the blades when said clip is releasably attached thereto.

11. The test clip as recited in claim 9, wherein:

said upper and lower members are substantially aligned with one another.

12. The test clip as recited in claim 9, wherein:

said connecting member is disposed proximate said edge of said upper member and said edge of said lower member.

13. The test clip as recited in claim 12, wherein:

said edge of said upper member includes an arcuate portion and a substantially straight portion;

said edge of said lower member includes an arcuate portion and a substantially straight portion;

said connecting member interconnects said substantially straight portions of said edges of upper and lower members.

14. The test clip as recited in claim 13, wherein:

said upper member has a maximum width;

said lower member has a maximum width;

said connecting member has a width which is less than one half of said maximum width of both of said upper and lower members.

15. The test clip as recited in claim 13, wherein:

said substantially straight portions of said edges of said upper and lower members are substantially aligned with one another and are substantially parallel with the trailing edge of the one of the blades when said test clip is releasably attached to the one of the blades.

said upper member, said lower member, and said connecting member are made as a one-piece construction.


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