Central vacuum cleaning system
    7.
    发明授权

    公开(公告)号:US11311158B1

    公开(公告)日:2022-04-26

    申请号:US16383094

    申请日:2019-04-12

    IPC分类号: A47L9/04 A47L5/38 A47L9/24

    摘要: A central vacuum cleaning system having a floor level debris pickup valve preferably mounted in the bottom of a cabinet and connected to a tubular conduit of a vacuum producing unit by a connection assembly. The connection assembly includes a flexible and expandable hose having a pair of end connectors. Each end connector preferably is a bayonet connector. The hose is connected at one end to the rigid tubular conduit of the central vacuum system and the other end connector is pulled through an opening formed in the cabinet by expanding the hose. The expandable hose enables the pickup valve to be attached easily to the other end of the hose, after which the hose is retracted back into a restricted space below the cabinet bottom wall and the pickup valve then attached to the cabinet.

    Dust-collecting device
    8.
    发明授权

    公开(公告)号:US11096533B2

    公开(公告)日:2021-08-24

    申请号:US16063080

    申请日:2016-11-24

    发明人: Yutaka Kashihara

    摘要: In a dust station, a suction part is connected selectively to one of a first suction port and a second suction port. In a state where the first suction port is connected to the suction part, a dust-collecting control unit drives the suction part and also automatically stops the suction part after elapsing of a first specified period of time. In a state where the second suction port is connected to the suction part, the dust-collecting control unit drives the suction part, and enables stopping the suction part through specified operation and also stops the suction part automatically when the suction part is not stopped even after elapsing of a second specified period of time or longer in a state where the suction part is driven, the second specified period of time being different from the first specified period of time.

    Convertible central vacuum unit
    9.
    发明授权

    公开(公告)号:US11058272B2

    公开(公告)日:2021-07-13

    申请号:US16383645

    申请日:2019-04-14

    申请人: Nelson Hulli

    发明人: Nelson Hulli

    摘要: An convertible central vacuum system is disclosed allowing for operation in both a cyclonic separation (bagless) mode as well as in a filter bag mode (via an removable filter bag adapter housing). With each mode having its own advantages and disadvantages, the user can readily convert between them as desired.

    CENTRAL VACUUM SYSTEM AND INLET VALVES THEREFOR

    公开(公告)号:US20210196091A1

    公开(公告)日:2021-07-01

    申请号:US17201219

    申请日:2021-03-15

    IPC分类号: A47L9/24 A47L5/38

    摘要: A central vacuum system includes a primary valve box or inlet and a secondary inlet. The central vacuum system includes a hose with a hose plug at the end thereof. The hose is stored in the primary valve box and may be extracted and attached to the secondary inlet. The secondary inlet includes features that enable the hose plug to connect with the secondary inlet. The secondary inlet includes at least one flex member that is configured to connect, in a releasable manner, with a channel formed in the hose plug. The flex member on the secondary inlet includes a section or portion thereof that moves radially relative to a longitudinal axis of the secondary inlet. The portion that moves radially may include a curved profile. This enables the flex member to wrap around a circumferential portion of the hose plug.