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ceiling fan

A ceiling fan and fan blade technology, which is applied in the field of ceiling fans with retractable fan blades, and can solve the problems of unsightly and loose fan blades, length limitations of fan blades, etc.

Inactive Publication Date: 2019-04-16
MARTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another problem with this type of ceiling fan is that the length of the blades is limited in order for the blades to then retract within the confines of the lighting fixture
This usually requires nesting of the blades, with the leading end of one blade sitting on the root of its neighbor, causing unsightly slack in the blades

Method used

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  • ceiling fan
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Examples

Experimental program
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Embodiment Construction

[0017] The ceiling fan 10 shown in the drawings includes an electric motor 11 hung on the ceiling. An electric motor 11 is connected to the circular plate 12, whereby the motor 11 rotates the plate 12 about a vertical axis. The plate 12 is adapted to support four equally spaced fan blade assemblies 20 , 21 , 22 , 23 . Each blade assembly 20 to 23 includes three blade segments 30, 31, 32 that are capable of interacting with each other from a retracted position (FIG. 2) to an outwardly operating position (FIG. 1). Sliding, in the retracted position the blade segments are located within the confines of the plate 12, in the outward operating position the blade segments 30-32 protrude radially outward from the plate 12, thereby facilitating air flow when the plate 12 is rotated by the electric motor 11 . It will be appreciated that the electric motor 11 may be located on the plate 12 or below the plate 12 .

[0018] Each blade assembly 20 - 23 is positioned on the periphery of t...

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PUM

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Abstract

A blade includes a mount supporting a plurality of superimposed blade segments arranged to slide relative to each other from a retracted storage configuration to an extended operating configuration.

Description

technical field [0001] The present invention relates to a ceiling fan, more particularly to a ceiling fan with retractable fan blades. Background technique [0002] A problem with many ceiling fans is that the radially protruding blades become unsightly dust collectors when the fan is not in use. Ceiling fans often incorporate lighting, and it has been proposed that the lighting include retractable fan blades that retract within the confines of the lighting when not in use, and expand radially outward to operate like conventional fan blades when in use . [0003] Problems with such ceiling fans relate to ensuring a balanced arrangement, especially when the blades are moved between retracted and operating positions. Another problem with this type of ceiling fan is that the length of the blades is limited in order for the blades to then retract within the confines of the lighting fixture. This typically requires nesting of the blades, with the leading end of one blade resti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D25/08F04D29/38F01D7/02
CPCF04D25/088F04D29/362F04D29/388F04D19/002
Inventor C·凯尔
Owner MARTEC
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