Pumps – Condition responsive control of pump drive motor – Having timer or delay means
Patent
1987-07-23
1988-07-12
Croyle, Carlton R.
Pumps
Condition responsive control of pump drive motor
Having timer or delay means
417 44, 417 45, 60418, F04B 4900
Patent
active
047566698
ABSTRACT:
An air compressor pressure adjustment device designed such that any values between two set points are determined and used as first and second standard values. When the air pressure in the reservoir decreases to the first standard value the air compressor is driven at a low speed. When the air pressure increases in the reservoir and reaches an upper limit set point the compressor is turned off. When this air pressure decreases to less than the lower limit set point, the air compressor is started once more.
REFERENCES:
patent: 1346898 (1920-07-01), Kingsbury
patent: 3985467 (1976-10-01), Lefferson
patent: 4149827 (1979-04-01), Hofmann, Jr.
patent: 4201517 (1980-05-01), Ferguson
patent: 4476886 (1984-10-01), Haynes
patent: 4518316 (1985-05-01), Yokota
Croyle Carlton R.
Neils Paul F.
Nippon Air Brake Co., Ltd.
Ray, Jr. J. O.
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