Rotary expansible chamber devices – With mechanical sealing – Axially movable end wall or end wall portion
Patent
1994-04-07
1995-09-12
Vrablik, John J.
Rotary expansible chamber devices
With mechanical sealing
Axially movable end wall or end wall portion
418154, 418180, 418181, 415141, F04C 500, F04C 1500
Patent
active
054492807
ABSTRACT:
A pump having a housing with an integral fluid reservoir and flexible end plates to permit the pump to be run dry for an extended period of time. A pair of reservoirs are provided, one each side of a pumping chamber. These reservoirs are in fluid communication with the pumping chamber via openings provided through the end plates of the pumping chamber and slots in the impeller hub. When the pump is run dry, fluid stored in these reservoirs is permitted to be released into the pumping chamber to provide a lubrication between the impeller and the chamber walls, thus reducing friction. The chamber end plates are thin and flexible. These end plates can bow outwardly due to the impeller expanding from increased heat when the pump is run dry, and thus reduce friction with the impeller. Accordingly, the pump can be run dry for an extended period of time without damaging or destroying the pump impeller. The end plate openings are preferably provided adjacent the impeller hub such that fluid is released closely proximate the impeller hub. An flexible impeller is preferred, but the present invention is suited for sliding vane and roller type impellers as well.
REFERENCES:
patent: 2336580 (1943-12-01), Yeatman
patent: 2455194 (1948-11-01), Rumsey
patent: 2636443 (1953-04-01), Rand
patent: 2664050 (1953-12-01), Abresch
patent: 2832293 (1958-04-01), Adams et al.
patent: 2855857 (1958-10-01), Chien-Bor Sung
patent: 2882830 (1959-04-01), McDuffie
patent: 2903991 (1959-09-01), Carlson et al.
patent: 3041979 (1962-07-01), McLean et al.
patent: 3161135 (1964-12-01), Erikkson
patent: 3386386 (1968-06-01), Erikkson
patent: 4392779 (1983-07-01), Bloemers et al.
Maki Bruce A.
Thompson David L.
Hypro Corporation
Vrablik John J.
LandOfFree
Pump including integral reservoirs for permitting dry run of pum does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pump including integral reservoirs for permitting dry run of pum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pump including integral reservoirs for permitting dry run of pum will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-402771