<p>A valve for selectively blocking the light passageway of a skylight includes a cylindrical shroud and first and second semicircular butterfly valve elements that pivot on respective axles within the shroud to selectively block the skylight. The axles can ride on a common motor-driven cam between a horizontal orientation to block the skylight and a vertical orientation to allow light to pass. The motor can be powered by a universal power supply that can operate at anywhere from below 100 volts to above 270 volts.</p>
申请公布号
EP1641995(A4)
申请公布日期
2009.12.30
申请号
EP20040777593
申请日期
2004.07.06
申请人
SOLATUBE INTERNATIONAL, INC.
发明人
PRENN, JOSEPH, W.;STEVENS, CHRISTIAN, P.;MUHLESTEIN, MICHAEL, W.