Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1991-08-14
1992-11-17
Coe, Philip R.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15339, 250574, 356 72, 356438, A47L 928
Patent
active
051632020
ABSTRACT:
A dust detector in a vacuum cleaner includes a light-emitting element exposed into a dust suction passage for emitting a light beam into the dust passage, and a light-detecting element exposed into the dust suction passage for detecting the light beam emitted from the light-emitting element. A detector unit detects the amount of dust flowing through the dust suction passage based on the intensity of the light beam transmitted from the light-emitting element across the dust suction passage to the light-detecting element. The light-emitting element and the light-detecting element are covered respectively by a pair of light-transmissive covers having respective end faces exposed into the dust suction passage and lying flush with an inner wall surface of the dust suction passage.
REFERENCES:
patent: 2565716 (1951-08-01), Boyce
patent: 2839646 (1958-06-01), Hester
patent: 2918585 (1959-12-01), Farmer
patent: 3448406 (1969-06-01), McClure
patent: 3483507 (1969-12-01), Griswold
patent: 3536831 (1970-10-01), Kanemaki et al.
patent: 3814935 (1974-06-01), Kissel
patent: 3816004 (1974-06-01), Bignardi
patent: 3861802 (1975-01-01), Belmear, Jr.
patent: 3870878 (1975-03-01), Walter et al.
patent: 4021120 (1977-05-01), Muller et al.
patent: 4394572 (1983-07-01), Wilber
patent: 4580311 (1986-04-01), Kurz
patent: 4586996 (1986-05-01), Shinohara et al.
patent: 4601082 (1986-07-01), Kurz
patent: 4680827 (1987-07-01), Hummel
patent: 4728801 (1988-03-01), O'Connor
patent: 4748336 (1988-05-01), Fujie et al.
patent: 4767213 (1988-08-01), Hummel
patent: 4769535 (1988-09-01), Sasaki et al.
patent: 4841144 (1989-06-01), Goi et al.
patent: 4920605 (1990-05-01), Takashima
patent: 4937912 (1990-07-01), Kurz
patent: 4942640 (1990-07-01), Hayashi et al.
Asada Shuji
Ishii Mitsuo
Kawakami Hiroshi
Shimada Sadahiro
Coe Philip R.
Cooley C.
Matsushita Electric - Industrial Co., Ltd.
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