Fluid reaction surfaces (i.e. – impellers) – Specific working member mount – Distally supported on radial arm
Reexamination Certificate
2002-05-17
2003-12-30
Look, Edward K. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Specific working member mount
Distally supported on radial arm
Reexamination Certificate
active
06669446
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to ceiling fans, and more particularly to interchangeable decorative ceiling fan blades and an adapter for easy attachment and replacement of the blades on a ceiling fan.
2. Description of Related Art
Given the high energy cost of air conditioning, individuals have increasingly sought to reduce such costs by installing ceiling fans to provide air circulation at a much more modest cost than air conditioning. However, ceiling fans are often unsightly eyesores, and are difficult and dangerous to clean. Furthermore, in strong winds such as a hurricane, ceiling fan blades act as sails which can damage the fan and possibly injure people and destroy property.
Typically, fan blades are bland in character in an attempt by the manufacturer to match every possible decor. Nevertheless, individuals have attempted to install decorative ceiling fans and blades to liven their surroundings. Replacement fan blades are available, but selection is extremely limited. Should an individual desire to replace fan blades, the holes of the replacement blades must match the hole arrangement of the support arms of the fan. Therefore, many types of blades are needed just to provide replacements for the different fans. While custom manufacture of blades is an option, it is prohibitively expensive for most users.
Decorative ceiling fans and decorative component parts are well known in the prior art. One such ceiling fan is shown in U.S. Pat. No. Des. 256,614 which issued to Hoyt on Aug. 26, 1980, and discloses a combined ceiling fan cover plate and blade connectors which have a leaf-like appearance.
Another similar invention is disclosed in U.S. Pat. No. Des 361,124 which issued to Pearce on Aug. 8, 1995. The invention disclosed is a ceiling fan with blades in the shape of an airplane propeller, with a decorative decal of a fighter plane which attaches to a ceiling, giving the appearance of an airplane dive-bombing in the room. Additionally, U.S. Pat. No. Des. 336,513 which issued to Junkin et al. on Jun. 15, 1993 discloses a ceiling fan blade that comprises fabric suspended by a tubular frame.
U.S. Pat. No. 5,458,464 which issued to Lee on Oct. 17, 1995, discloses a blade mounting device for a ceiling fan. The device comprises a plurality of brackets, with a plurality of decorative inserts which have various configurations, profiles and colors. Only the inserts themselves are interchangeable, and the fan blades still require a significant amount of labor to remove.
U.S. Pat. No. 5,470,205 which issued to Conklin, Jr. on Nov. 28, 1995, discloses a decorative ceiling fan blade removably mounted on a ceiling fan. A decorative sheet may be applied to an adhesive layer on the underside of the blade. Additionally, the blade has a plurality of openings positioned in three groupings, in order to accommodate a variety of threaded openings on a fan support arm.
U.S. Pat. No. 5,486,094 which issued to Davis, Jr. et al. on Jan. 23, 1996, discloses a ceiling fan blade mounting bracket and support arms providing two fan blade support points, for reinforcing mounting of fan blades to the motor. These brackets do not provide for the easy removal of fan blades.
U.S. Pat. No. 6,309,183 which issued to Bucher et al. on Oct. 30, 2001, describes a replaceable blade system for overhead ceiling fans which provides a mounting arm having flat topped fasteners and a replaceable blade having similarly disposed keyhole slots.
None of the above inventions and patents, taken either singly or in combination, is seen to describe the instant invention as claimed. Thus, an interchangeable fan blade system is desired to overcome the aforementioned shortcomings of the prior art.
SUMMARY OF THE INVENTION
The present invention provides an interchangeable fan blade system for a ceiling fan. A set of adapters have a plurality of elongated attachment apertures that allow the adapter to be fitted onto virtually any type of fan support arm with the use of a set of shoulder screws. The adapter may be formed into any of a variety of configurations. The system further includes a complimentary set of interchangeable fan blades having a set of keyhole bores, with each blade being configured to accept the shoulder screws of the adapter. Each blade may be removably secured to a respective adapter by a variety of fasteners, including but not limited to hooks, locator pin and hold downs, snap buckles, hook arms, spring clips, quick release pins, snap-ins, and hook-and-loop fasteners.
A second embodiment of the interchangeable fan blade system includes a set of interchangeable fan blades having a plurality of elongated attachment apertures which allow the blades to be secured to virtually any type of fan arm, by threading a plurality of shoulder cap screws and a plurality of male-female connectors though the plurality of elongated attachment apertures. The fan blade may be secured to the fan arm by either a knurled-knob screw with an elongated threaded portion, or a spring-clamp screw.
A third embodiment of the interchangeable fan blade system includes a set of support arms that have shoulder screws adapted to removably attach to a set of keyhole bores of a complimentary set of interchangeable fan blades. Each blade may be removably secured to a respective support arm by a variety of fasteners, including but not limited to hooks, locator pin and hold downs, snap buckles, hook arms, spring clips, quick release pins, snap-ins, and hook-and-loop fasteners.
Accordingly, it is a principal object of the invention to provide an interchangeable fan blade system that allows for easy replacement of fan blades with other fan blades of differing styles.
It is another object of the invention to provide an interchangeable fan blade system whereby fan blades may be easily removed for cleaning and maintenance.
It is a further object of the invention to provide an interchangeable fan blade system whereby fan blades may be easily removed in the event of inclement weather.
It is an object of the invention to provide improved elements and arrangements thereof in an apparatus for the purposes described which is inexpensive, dependable and fully effective in accomplishing its intended purposes.
These and other objects of the present invention will become readily apparent upon further review of the following specification and drawings.
REFERENCES:
patent: D256614 (1980-08-01), Hoyt
patent: 5180284 (1993-01-01), Monrose, III et al.
patent: D336513 (1993-06-01), Junkin et al.
patent: D361124 (1995-08-01), Pearce
patent: 5458464 (1995-10-01), Lee
patent: 5462412 (1995-10-01), Scofield et al.
patent: 5470205 (1995-11-01), Conklin, Jr.
patent: 5486183 (1996-01-01), Davis, Jr. et al.
patent: 5542819 (1996-08-01), Bucher et al.
patent: 5944486 (1999-08-01), Hodgkins, Jr.
patent: 6010306 (2000-01-01), Bucher et al.
patent: 6155787 (2000-12-01), Hodgkins, Jr.
patent: 6171059 (2001-01-01), Bucher et al.
patent: 6309183 (2001-10-01), Bucher et al.
patent: 6336792 (2002-01-01), Bucher et al.
patent: 6352409 (2002-03-01), Blateri et al.
patent: 6352411 (2002-03-01), Bucher et al.
Litman Richard C.
Look Edward K.
McAleenan J. M.
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