Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1989-01-12
1990-10-23
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
153276, 15353, 285 7, A47L 536
Patent
active
049641891
ABSTRACT:
An adapter, mounted on the cylindrical sidewall of the vacuum cleaner tank, provides a receptacle for a rigid connector on which a flexible vacuum hose is sealingly mounted. The leading edge of the connector insert is beveled. A corresponding beveled surface is formed on the inner wall of the receptacle to engage and seal with the beveled leading edge of the connector to form a continuous, peripheral seal immediately adjacent to the wall of the tank so that when the vacuum motor is turned on, a positive force is generated to increase the effectiveness of the seal.
REFERENCES:
patent: 2103050 (1937-12-01), White
patent: 2606336 (1952-08-01), Balluff
patent: 2653343 (1953-09-01), Kunkler
patent: 2757942 (1956-08-01), Eberhart
patent: 2898622 (1959-08-01), Hurd
patent: 2908933 (1959-10-01), Todd, Jr. et al.
patent: 3055161 (1962-09-01), Hallstrom
patent: 3069186 (1962-12-01), Stevens
patent: 3524211 (1970-08-01), Wolf
patent: 4443910 (1984-04-01), Fitzwater
Labrador Grace D.
Palmer Gary E.
Rau Jerome E.
Hako Minuteman, Inc.
Moore Chris K.
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