Deflectable enclosure cover

Details Deflectable enclosure cover Deflectable enclosure cover

2005-05-24

2005-05-24

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

Including casing part selectively movable relative to fixed...

C415S174200, C416S206000, C416S24400R

Reexamination Certificate

active

06896481

ABSTRACT:
A water pump includes a first enclosure having a center portion that is moveable from a normal condition to a deflected condition and a second enclosure adjacent to the first to form an internal cavity. An impeller is disposed within the internal cavity. A tubular shaft portion extends from the impeller through a bore in the second enclosure. The tubular shaft portion is press fit to a motor shaft which rotates the impeller within the internal cavity. As the motor shaft is inserted into the tubular portion of the impeller, a tool is used to press on and axially deflect the center portion of the first enclosure. Thus, the center portion of the first enclosure contacts the impeller and provides an opposing force on the impeller while the motor shaft is inserted into the tubular portion of the impeller. When the motor shaft is press-fit sufficiently into the tubular portion, the tool is removed. When the tool is removed, a convoluted portion around a center portion of the first enclosure biases the center portion to move axially away from the impeller and form a clearance gap between the impeller and the first enclosure. Several optional friction engagement members may be used to connect the motor shaft to the tubular shaft.

REFERENCES:
patent: 2461835 (1949-02-01), Werra
patent: 3481273 (1969-12-01), Werra
patent: 3618994 (1971-11-01), Gepfert et al.
patent: 4822241 (1989-04-01), Jarvis et al.
patent: 5295788 (1994-03-01), Tajima et al.
patent: 6062815 (2000-05-01), Holt et al.

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