Lip seal shroud

DETAILED DESCRIPTION The present invention is directed towards improvements in vacuum exhaust shrouds adapted for use in collecting dust generated during operation of portable sanding or like machines.
More particularly, the present invention is directed towards improved shroud constructions, which provide for efficient dust collection under minimum pressure head conditions, while minimizing or avoiding retardation of movement of a sanding member or movement of a sanding machine over the surface of a workpiece with which the shroud engages.
It is a characteristic of all disclosed forms of the present invention, that a shroud be provided with a resiliently deformable lip positioned to normally engage with a surface defined by either a driven sanding member or a workpiece being sanded, while being supported in a manner preventing such lip from seizing against or being drawn tightly into engagement with such surface, as would otherwise retard or arrest movement of such sanding member or movement of such sanding machine.