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专利名称：Vacuum cleaners especially quiet vacuum
cleaners, pumps, and engines
发明人：Charles A. Castronovo申请号：US11117631申请日：20050429公开号：US08272854B2公开日：20120925
专利附图：
摘要：This impeller-free vacuum cleaner is based on a rotary piston. Vacuum suctionof 300 inches of water or better can be delivered. Quietness of below 70 db can bedelivered. Tongued rotary piston assemblies may be strategically placed, such as
stacked, to eliminate vacuum suction dead zones. Sealing problems that otherwise wereencountered with previous reciprocating and rotary piston structures for vacuumcleaners are solved by using a tongued rotary piston with a double-notched rotary valveoperating by a Geneva mechanism, and a novel pancake-shaped cylindrical structure tohouse the rotary piston. An inventive rotary combustion engine also is disclosed.
申请人：Charles A. Castronovo
地址：Timonium MD US
国籍：US
代理机构：Whitham Curtis Christofferosn & Cook, PC
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