Improvements in Vacuum Cleaners for Carpets and Floors.

摘要

5495. Entwisle & Kenyon, Kenyon, W. H., and Shorrock, J: L. March 5. Equalizing load on wheels.-To allow vacuum cleaning-apparatus to be used on uneven floors, the driving-wheels D, D' are connected by a shaft E supported in a bearing e which is pivoted about a bolt e'. Movement of the bearing e may be limited by springs or the like.