Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1989-05-31
1990-07-17
Cohan, Alan
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
137117, 137569, F04D 1500
Patent
active
049415026
ABSTRACT:
A low pressure recirculation valve for cooling a centrifugal pump. The invention comprises a unitary valve casing divided into a first valve chamber and a second valve chamber, the casing having a first port for introducing fluids into said first chamber, and a second port for expelling fluids out of said second chamber, the first chamber having a recirculation port for redirecting fluids back to said centrifugal pump. A multiple piece check valve member situated between said first chamber and second chambers permits the flow of fluid from said first chamber to the second chamber and prevents the flow of fluid from said second chamber to said first chamber. A slidable valve stem coupled to said check valve member and extending through the first chamber moves the check valve member from an open to closed position. Means coupled to said valve stem biases the slidable valve stem and check valve means toward the closed position. A recirculation valve means operatively coupled to said valve stem opens and closes said recirculation port, said recirculation valve means opening when said check valve means is closed and closing when said check valve means is open.
REFERENCES:
patent: 934360 (1909-09-01), Roth
patent: 1537943 (1925-05-01), Hufford
patent: 2398089 (1946-04-01), Fehr
patent: 2702048 (1955-02-01), Coffey
patent: 2879794 (1959-03-01), Costello
patent: 3750693 (1973-08-01), Hardison
patent: 3825221 (1974-07-01), Smith, Jr.
patent: 4095611 (1978-06-01), Hetz
patent: 4207915 (1980-06-01), Beker
patent: 4243064 (1981-01-01), Nolte
patent: 4501290 (1985-02-01), Sturman et al.
patent: 4516600 (1985-05-01), Sturman et al.
patent: 4541454 (1985-09-01), Sturman et al.
patent: 4638831 (1987-01-01), Lindgren
ARC automatic recirculation control valve, Yarway Corporation, 1980.
Loos George
Maxwell Horace J.
Cohan Alan
Keystone International Holdings Corp.
LandOfFree
Low pressure recirculation valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low pressure recirculation valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low pressure recirculation valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-90610