Pumps – With condition responsive control of coolant or lubricant
Reexamination Certificate
2007-01-23
2007-01-23
Trieu, Theresa (Department: 3748)
Pumps
With condition responsive control of coolant or lubricant
C417S299000, C417S310000, C418S100000, C418S201100, C418S201200
Reexamination Certificate
active
10859861
ABSTRACT:
A rotary screw vacuum pump system includes a vacuum bypass system, which communicates with a first closed cell formed by the rotor system. An air bypass valve within an air communication conduit is controlled by a solenoid valve that operates in response to a pressure switch. The pressure switch is in communication with a vacuum pump suction conduit that draws suction for a suction system attached thereto. The solenoid valve is activated by the pressure switch at a vacuum level slightly below the point at which the undesirable cavitation noise generated at terminal vacuum condition begins.
REFERENCES:
patent: 4394113 (1983-07-01), Bammert
patent: 4498849 (1985-02-01), Schibbye et al.
patent: 4549856 (1985-10-01), Cash et al.
patent: 4842501 (1989-06-01), Schibbye et al.
patent: 5028220 (1991-07-01), Holdsworth
patent: 5171130 (1992-12-01), Kume et al.
patent: 5765392 (1998-06-01), Baur
patent: 2948992 (1981-06-01), None
patent: 62265489 (1987-11-01), None
patent: 63106394 (1988-05-01), None
patent: 01257789 (1989-10-01), None
patent: 03151593 (1991-06-01), None
patent: 05141383 (1993-06-01), None
Carlson & Gaskey & Olds
Hamilton Sundstrand Corporation
Trieu Theresa
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