Pumps – With signal – indicator – or inspection means
Patent
1993-11-03
1995-08-08
Berisch, Richard A.
Pumps
With signal, indicator, or inspection means
73 40, F04B 2102
Patent
active
054393558
ABSTRACT:
A method and apparatus for determining leakage, particularly of valves, in a pump assembly. A pump assembly (20) includes a primary valve (34) and a secondary valve (36), which may be selectively activated to control the source of fluid input to the pump assembly. The pump assembly also includes an inlet valve (42) and an outlet valve (50) disposed on each side of the pumping chamber (46). Downstream of the outlet valve is disposed a pressure sensor (54), which produces a signal indicative of the pressure of fluid within the pump assembly at that point. Leakage in the inlet or outlet valves is detected in the inlet or outlet valves by filling the pumping chamber with fluid, closing the inlet and outlet valves, and equalizing the pressure in the pump assembly distal to the inlet valve. After the pressure has been equalized, the outlet valve is opened and a reference pulse is determined as a function of the signal produced by the pressure sensor. The outlet valve is then closed and at least a partial pumping cycle is effected to pressurize fluid in the pumping chamber. The outlet valve is opened and a pressure pulse should propagate down the delivery passage from the pumping chamber. If the difference between the magnitude of the pressure pulse and that of the reference pulse is less than a predetermined value, either the inlet or outlet valve has leaked. The primary and secondary valves are checked for leakage in much the same manner.
REFERENCES:
patent: 4811252 (1989-03-01), Furuse
patent: 4818186 (1989-04-01), Pastrone et al.
patent: 4850807 (1989-07-01), Frantz
patent: 5000664 (1991-03-01), Lawless et al.
patent: 5336053 (1994-08-01), Wynkoop
Barker Craig S.
Bunyard Marc R.
Jimison Walter L.
Abbott Laboratories
Berisch Richard A.
Freay Charles G.
LandOfFree
Method and apparatus to test for valve leakage in a pump assembl does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus to test for valve leakage in a pump assembl, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus to test for valve leakage in a pump assembl will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-967658