Fluid reaction surfaces (i.e. – impellers) – With illumination means
Reexamination Certificate
2006-12-26
2006-12-26
Look, Edward K. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With illumination means
C416S087000, C416S143000, C416S140000
Reexamination Certificate
active
07153100
ABSTRACT:
A ceiling fan with retractable fan blades includes an electric motor operable to spin a rotor with a plurality of fan blades attached thereto. Each of the fan blades is operable to move between a closed position and an open position. A rotatable center ring is included on the rotor and connecting rods join each fan blade to the center ring. Rotation of the center ring relative to the rotor moves the plurality of connecting rods and fan blades in unison. The fan blades are spring biased toward the closed position. When the rotor rotates, centrifugal forces acting on the fan blades overcome the spring biasing forces and cause the fan blades to move toward the open position. A governor is positioned between the rotor and at least one of the fan blades to limit the speed of movement of the fan blades between the closed position and the open position. The governor may take the form of a fluid cylinder.
REFERENCES:
patent: 1361785 (1920-12-01), Tucker
patent: 1445402 (1923-02-01), LeVelle
patent: 1458348 (1923-06-01), LeVelle
patent: 1682044 (1928-08-01), Herion
patent: 2079942 (1937-05-01), LeVelle
patent: 2142080 (1939-01-01), Asplund
patent: D173609 (1954-12-01), Cockelaere
patent: 2974731 (1961-03-01), Mader
patent: 3401874 (1968-09-01), Covington
patent: 3565544 (1971-02-01), Marshall
patent: 4139330 (1979-02-01), Neal
patent: 4342073 (1982-07-01), Ranten
patent: 4515538 (1985-05-01), Shih
patent: 4621977 (1986-11-01), Markwardt
patent: 4720241 (1988-01-01), Markwardt
patent: 4729725 (1988-03-01), Markwardt
patent: 4776761 (1988-10-01), Diaz
patent: 4801243 (1989-01-01), Norton
patent: D304229 (1989-10-01), Rezek
patent: 4884947 (1989-12-01), Rezek
patent: D321933 (1991-11-01), Markwardt et al.
patent: D322475 (1991-12-01), Markwardt et al.
patent: 5154579 (1992-10-01), Rezek
patent: D330759 (1992-11-01), Rezek
patent: RE34147 (1992-12-01), Rezek
patent: D348512 (1994-07-01), Markwardt et al.
patent: 5466177 (1995-11-01), Aihara
patent: 5593280 (1997-01-01), Takada et al.
patent: D398981 (1998-09-01), Wenzell
patent: 6027309 (2000-02-01), Rawls et al.
patent: 6450446 (2002-09-01), Holben
patent: 6547519 (2003-04-01), deBlanc et al.
Frampton Thomas C.
Schoene Keith R.
Fanimation, Inc.
Look Edward K.
Maginot Moore & Beck
White Dwayne J
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