Water pump

Details Water pump Water pump

2007-12-26

2011-12-20

Freay, Charles (Department: 3746)

Pumps

Including disengageable rotary or frangible drive connection

C417S420000

Reexamination Certificate

active

08079828

ABSTRACT:
In one embodiment of the present invention, a water pump (10) is configured such that rotation is transmitted in a non-contact condition from a drive-end rotation member (20) whereto rotation is transmitted from an engine to a driven-end rotation member (30) having a pump impeller (31). The drive-end rotation member (20) includes a vacuum chamber (50) and a pair of permanent magnets (26a,26b) provided so as to be mutually opposed with different polarities. The driven-end rotation member (30) includes an induction ring (32) having an induction section (32b) provided so as to form a prescribed interval between the pair of permanent magnets (26a,26b). Furthermore, the pair of permanent magnets (26a,26b) is moved in a rotation axis direction with respect to the induction section (32b) due to the vacuum introduced into the vacuum chamber (50), and the overlap amount (L1) of the pair of permanent magnets (26a,26b) and the induction section (32b) in the rotation axis direction is changed.

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Japanese English translation for Application 2004041823—Publication No. 2005233044.
“Impeller, n.”. OED Online. Mar. 2011. Oxford University Press. Jun. 4, 2011 <http://www.oed.com/view/Entry/92207?redirectedFrom=impeller>. (retrieved from http://dictionary.oed.com on Mar. 23, 2010).
Apr. 8, 2010 Search Report issued in European Patent Application No. 07860182.0.

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