US 11,988,218 B2
Electric coolant pump with expansion compensating seal
Brandon Christopher Kruizenga, West Palm Beach, FL (US); and Stephen Christopher Trance, Jupiter, FL (US)
Assigned to MULTI PARTS SUPPLY USA, INC., Jupiter, FL (US)
Filed by MULTI PARTS SUPPLY USA, INC., Jupiter, FL (US)
Filed on Mar. 2, 2022, as Appl. No. 17/684,491.
Claims priority of provisional application 63/158,924, filed on Mar. 10, 2021.
Prior Publication US 2022/0290683 A1, Sep. 15, 2022
Int. Cl. F04D 29/08 (2006.01); F04D 13/02 (2006.01); F04D 13/06 (2006.01); F04D 29/02 (2006.01); F04D 29/043 (2006.01); F04D 29/10 (2006.01); F04D 29/12 (2006.01); F04D 29/40 (2006.01); F04D 29/42 (2006.01); F04D 29/58 (2006.01)
CPC F04D 29/086 (2013.01) [F04D 13/026 (2013.01); F04D 13/06 (2013.01); F04D 13/0606 (2013.01); F04D 13/0626 (2013.01); F04D 13/0633 (2013.01); F04D 29/026 (2013.01); F04D 29/043 (2013.01); F04D 29/106 (2013.01); F04D 29/126 (2013.01); F04D 29/406 (2013.01); F04D 29/426 (2013.01); F04D 29/586 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electric coolant pump system, comprising:
a housing
the housing having a main body and an end cap;
the main body having a hollow interior and an open end;
the end cap operably connected to the main body and closing the open end of the main body;
a rotor shaft;
the rotor shaft operably connected to the housing;
a rotor;
the rotor operably connected to the rotor shaft and positioned within the hollow interior;
an impeller operably connected to the rotor;
wherein the impeller is configured to pump coolant when rotated;
wherein one or more components of the electric coolant pump system thermally expand and contract as the coolant is heated and cooled;
an expansion compensating seal;
wherein the expansion compensating seal is configured to provide and maintain a water tight seal to prevent the coolant from leaking out from the housing as the one or more components thermally expand and contract,
wherein the expansion compensating seal is positioned between an outward facing surface of a head of the rotor shaft and an inward facing surface of the housing;
wherein the expansion compensating seal includes a recessed channel formed in the outward facing surface of the head of the rotor shaft;
wherein the expansion compensating seal includes a seal member positioned in the recessed channel.