Integral connection for plastic water pump impeller
Patent 4832573 Issued on May 23, 1989. Estimated Expiration Date: 
November 27, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 27, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2652191 2836877 3145912 3303791 3319939 3360051 3819294 3872691 Slotted shaft adapter Ice machine pump rebuild kit Patent #: 4557672 InventorAssigneeApplicationNo. 07/125949 filed on 11/27/1987US Classes:416/241A, Plastic or synthetic material403/375, Peripheral enlargement, depression, or slot on one member is joint component403/383, Non-circular rod section is joint component415/216.1, With runner shaft of specific shape or material415/217.1, With runner having corrosion resistant or nonmetallic portion416/229R, Laminated, embedded member or encased material416/244RSUPPORT MOUNTING, CARRIER OR FAIRING STRUCTUREExaminersPrimary: Garrett, Robert E.Assistant: Kwon, John T. Attorney, Agent or FirmInternational ClassesF16D 1/06 (20060101)F16D 1/08 (20060101) F04D 29/20 (20060101) F04D 29/18 (20060101) AbstractAn integral connection for a plastic water pump impeller includes a molded non circular plug and inwardly facing, radially flexible cylindrical wall in the center of the impeller, and a matching female socket and matching outwardly facing cylindrical wall on the end of the shaft. A rib on the impeller wall and groove in the shaft wall pop fit together and flex the impeller wall out as the impeller and shaft are push pitted together. The socket and plug prevent relative turning, and the rib and groove prevent the impeller from pulling off of the shaft.Other References
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