Abstract

Ceiling fan blades for maximizing air flow at operational speeds of up to approximately 200 revolutions per minute(rpm). The blades have a positive twist at the tip ends of approximately 5 degrees to approximately 10 degrees parallel to the ceiling. The root end of the blades closest to the motor can have a positive twist exceeding that of the tip end and can be approximately 20 to approximately 35 degrees parallel to the ceiling. The ceiling fans can have individual blade lengths of approximately 20 inches and overall spans of up to approximately 52 inches and up to approximately 54 inches. Each embodiment can use three, four, and five blades, with the blades being made of injection molded plastic. and the like. The embodiments can include built in light kit domes.

Document Type

Patent

Patent Number

US 6,659,721

Application Serial Number

09/976,515

Issue Date

12-9-2003

Current Assignee

UCFRF

Assignee at Issuance

UCFRF

College

Florida Solar Energy Center (FSEC)

Department

FSEC

Allowance Date

7-28-2003

Filing Date

10-12-2001

Assignee at Filing

UCFRF

Filing Type

Nonprovisional Application Record

Donated

no

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