Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1991-07-01
1993-04-13
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15319, 15353, 55213, A47L 928
Patent
active
052010953
ABSTRACT:
A motor controlling apparatus for a vacuum cleaner comprising a cylinder disposed on the base of the vacuum cleaner, a spring base mounted at lower portion of the cylinder and provided with an aperture communicating with the hole of the base, a spring mounted on the spring base, a piston biased by the spring, a cylinder head seal-tightly contacting with the piston and provided with a hole communicating with the atmosphere, and a limit switch contacting with the piston by means of an actuating rod penetrating the hole of the cylinder head in order to automatically turn off circuit of drive motor. The present invention can provide a motor controlling apparatus which can automatically open the circuit of the drive motor by means of the limit switch capable of being opened by the actuating rod as the piston moves downward resulting from rising of degree of vacuum inside the collection tank of the vacuum cleaner such as due to a clogging of the suction port and the filter pocket of the tank.
REFERENCES:
patent: Re26950 (1970-09-01), Hays
patent: 961816 (1910-06-01), Squier
patent: 1621596 (1927-03-01), Minuth
patent: 3048875 (1962-08-01), Bottinelli et al.
patent: 3180071 (1969-04-01), Nolte
patent: 3748834 (1973-07-01), Ruby
patent: 4123818 (1978-11-01), Hurwitz
patent: 4691407 (1987-09-01), Sloan et al.
patent: 4726060 (1988-10-01), Chang
Bushnell Robert E.
Moore Chris K.
Samsung Electronics Co,. Ltd.
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