专利名称：Sealing means for a scrubbing machine发明人：Boomgaarden, Steven L.申请号：EP98309311.3申请日：19981113公开号：EP0931502A2公开日：19990728
专利附图：
摘要：A surface maintenance machine has a body, wheels for supporting the body, asource of cleaning solution on the body and a conduit for applying the cleaning solutionto a surface to be cleaned. There are scrub brushes on the body and there is a squeegeecarried by the body. A container for used cleaning solution is located on the body and
there is a vacuum system, including a vacuum fan, for removing used cleaning solutionfrom adjacent the squeegee and conveying it to the used cleaning solution container. Thevacuum system includes a conduit between the used cleaning solution container and thevacuum fan. There is a seal extending about this conduit, with the exterior of the sealbeing exposed to atmospheric pressure and the interior being exposed to the less thanatmospheric pressure of the vacuum system. The seal has connected annular lip portions,with the pressure difference between opposite sides of the seal moving said lip portionsinto tight sealing contact with the conduit and adjacent portions of the vacuum system.
申请人：Tennant Company
地址：701 North Lilac Drive Minneapolis Minnesota 55422 US
国籍：US
代理机构：Spencer, Michael David, Dr.
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