Patent Number: 6,966,749

Title: Pump with seal rinsing feature

Abstract: A centrifugal pump has a pump case and a rotatable impeller disposed within the pump case. A central aperture is defined within the rearward wall of the pump case to facilitate the connection of an impeller drive shaft to the impeller. A drive shaft seal is disposed within the central aperture to seal the impeller drive shaft to the pump case. At least one or more grooves are defined in the rearward wall of the pump case to carry liquids to and from the drive shaft seal. One or more radial ridges are disposed on the rearward side of the impeller to encourage liquids to flow within the grooves to and from the drive shaft seal to continuously wash away precipitates around the seal and to cool the seal.

Inventors: Loyd; Casey (Pomona, CA), Vargas; Pedro (Pomona, CA), Loyd; Buzz (Pomona, CA)

Assignee: California Acrylic Industries

International Classification: F04D 29/08 (20060101); F04D 29/12 (20060101); F16J 15/34 (20060101); F04D 029/10 ()

Expiration Date: 1/22/02018