초록 ▼

A fan blade has a three dimensional shape that resembles a leaf. The blade is made of balsa or other suitable wood with the grain of the wood running along its length. The obverse surface of the blade is contoured and has a central vein and lateral veins running from the central vein to opposite edg

A fan blade has a three dimensional shape that resembles a leaf. The blade is made of balsa or other suitable wood with the grain of the wood running along its length. The obverse surface of the blade is contoured and has a central vein and lateral veins running from the central vein to opposite edges. The reverse side has one or more channels. Braces are set in the channels. The braces are also made of balsa or comparable wood and their grain runs transverse to the direction of the gain of the blade.

대표청구항 ▼

1. A blade for a ceiling fan comprising:an elongated member having a shape corresponding to a leaf with a length greater than its width and with a perimeter having opposite sides; the elongated member comprising one or more strips of material disposed in the elongated direction; the elongated member

1. A blade for a ceiling fan comprising:an elongated member having a shape corresponding to a leaf with a length greater than its width and with a perimeter having opposite sides; the elongated member comprising one or more strips of material disposed in the elongated direction; the elongated member having an obverse surface with an irregular topology and a reverse surface having a generally planar topology; the reverse surface having means for laterally securing the elongated member to prevent separation and fragmentation of the blade. 2. The ceiling fan blade of claim 1 wherein the means for laterally securing the elongated member to prevent separation and fragmentation of the blade comprises one or more cross braces extending generally transverse to the grain of the wooden elongated member for supporting the elongated member.3. The ceiling fan blade of claim 1 wherein the elongated member comprises wood.4. The ceiling fan blade of claim 1 wherein the material is selected from the group consisting of balsa, butternut, jelutong, eastern white pine, sugar pine, aspen, poplar, alder, spruce, basswood, fir, hemlock, paulowina, chestnut, teak, cedar, plastic, particle board, and resin impregnated wood particles.5. The ceiling fan of claim 1 wherein the reverse side of the elongated member has one or more channels that have a floor and sidewalls spaced apart by the floor.6. The ceiling fan of claim 5 wherein the channels are filled with wooden brace members.7. The ceiling fan of claim 6 wherein the wooden brace member has a grain running along the length of the brace member and transverse to the grain of the elongated member.8. The ceiling fan of claim 1 wherein the elongated member comprises a plurality of strips of wood that are laterally fixed to adjacent strips to form a laminated body of wood.