Pumps – With condition responsive pumped fluid control – Pressure responsive relief or bypass valve
Patent
1988-03-30
1990-11-20
Smith, Leonard E.
Pumps
With condition responsive pumped fluid control
Pressure responsive relief or bypass valve
137115, 417311, 417540, F04B 2100
Patent
active
049715275
ABSTRACT:
A unitary pump, regulator valve/pulsation dampener, and interconnecting passageways is provided. The regulator valve/pulsation dampener includes a flexible member disposed in a chamber arranged between the fluid input and fluid output. The diaphragm flexes as a function of the pressure in the chamber to control the opening and closing of a bypass valve member and, in addition, damps out both high and low frequency pulsations generated in the ink by the pump. When the pressure in the system increases beyond a predetermined limit the valve member is opened to divert some of the fluid flow into a bypass passageway until the pressure falls below the predetermined limit. The pressure limit in the system can be varied by adjusting the external pressure applied to the flexible member using an adjustment screw and compression spring.
REFERENCES:
patent: 2654323 (1953-10-01), Wahlmark
patent: 3694105 (1972-09-01), Martin
patent: 3774628 (1973-11-01), Norton et al.
patent: 4472112 (1984-09-01), Unger
patent: 4555719 (1985-11-01), Arway et al.
patent: 4602662 (1986-07-01), Eremity et al.
Smith Leonard E.
Videojet Systems International Inc.
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