Apparatus for sealing a vacuum chamber of a seed metering apparatus

摘要: Sealing arrangement for a vacuum seed metering mechanism includes housing assembly divided into receiving chamber and by circular disc having parallel flat sides. The is provided with row of openings proximate periphery the disc. Due to pressure differential across openings, seeds supplied are carried discharge area mechanism. cover portion an integrally formed sealing face; preferably pair radially spaced annular faces transverse ramp portion. joined each other in common plane define boundary chamber. disposed on opposed sides apertures disc, arranged confronting relation relative side A drive structure supports contact face spring also may be further urge toward continuous sliding