Pumps – Motor driven – Electric or magnetic motor
Patent
1987-07-02
1988-09-20
Smith, Leonard E.
Pumps
Motor driven
Electric or magnetic motor
415112, F04B 1504
Patent
active
047721839
ABSTRACT:
A pump assembly for effecting fluid flow of high temperature cooking oil in a cooker and the like includes a support extension tube having a drive motor mounted at one end thereof and a centrifugal pump housing mounted at the other end, an impeller contained within the pump housing and drivingly connected to the drive motor by a drive shaft connection, a bearing in the housing for supporting the drive shaft closely adjacent to the impeller, and a runner and skirt structure between the drive shaft and the support extension tube for the purpose of minimizing oil leakage. The runner and skirt having a designed clearance to avoid interference, binding or freeze-up of the rotating elements due to temperature expansion thereof after operation with high temperature cooking oil over an extended period of time. A vacuum connection between the pump input and the support tube, together with a vacuum breaker structure for the support tube, also are very important included elements of this pump assembly.
REFERENCES:
patent: 1886714 (1932-11-01), Moss
patent: 2149777 (1939-03-01), Kidwell
patent: 2448717 (1948-09-01), Jeffcock
patent: 2677328 (1954-05-01), Vitek
patent: 3698830 (1972-10-01), Goyne
patent: 4335886 (1982-06-01), Frey et al.
Smith Leonard E.
Szczecina Jr. Eugene L.
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