Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1994-03-03
1996-04-09
Scherbel, David
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15314, 15412, A47L 538
Patent
active
055049672
ABSTRACT:
A combined inlet structure and switching device for a central vacuum system includes an inlet housing having top, bottom and side walls defining a vacuum inlet chamber and a front with a dirt receiving opening. An aperture is located in the top wall and can be connected to a pipe leading to a central vacuum source. A closure member is movable between first and second positions in order to close or open the aperture. A foot operated actuator is connected to the housing and is able to pivot the closure member between the first and second positions. A spring biases the closure member towards the first position and operates when the actuator is pressed in one direction. When the closure member is moved to the second position, it will remain there unless the actuator is pressed in another, opposite direction. There is also a switch mechanism responsive to movement of the actuator for opening and closing an electrical circuit connected to the central vacuum source.
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patent: 2979755 (1961-04-01), McCaskill
patent: 2984856 (1961-05-01), Hunt et al.
patent: 3027587 (1962-04-01), Bierstock
patent: 3027588 (1962-04-01), Bierstock
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patent: 5111841 (1992-05-01), Houston
patent: 5205013 (1993-04-01), Lopes
patent: 5279016 (1994-01-01), Klassen
patent: 5408721 (1995-04-01), Wall
Chin Randall E.
Graham Bernard J.
Scherbel David
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