US 12,305,639 B2
Electromotive oil pump comprising a non-return valve
Stephan Roos, Wertheim-Höhefeld (DE)
Assigned to Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg, (DE)
Appl. No. 16/759,109
Filed by Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg, Würzburg (DE)
PCT Filed Oct. 23, 2018, PCT No. PCT/EP2018/078965
§ 371(c)(1), (2) Date Apr. 24, 2020,
PCT Pub. No. WO2019/081465, PCT Pub. Date May 2, 2019.
Claims priority of application No. 10 2017 219 004.3 (DE), filed on Oct. 24, 2017.
Prior Publication US 2020/0340462 A1, Oct. 29, 2020
Int. Cl. F04C 15/06 (2006.01); F04C 2/10 (2006.01); F04C 15/00 (2006.01); F16K 15/06 (2006.01)
CPC F04C 15/066 (2013.01) [F04C 2/102 (2013.01); F04C 15/008 (2013.01); F16K 15/06 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An electromotive oil pump for a motor vehicle comprising:
an electric motor;
a pump housing defining a flow channel and including an intake nozzle and a discharge nozzle, the discharge nozzle defining a valve seat and configured to receive oil from the flow channel, at least a portion of the flow channel extends in a transverse direction and the discharge nozzle extending in a longitudinal direction, the longitudinal direction orthogonal to the transverse direction;
a pump rotor driven by the electric motor and arranged in the pump housing; and
a spring-free check valve including,
a closing body holder disposed in the discharge nozzle with a first joining contour of the closing body holder directly interacting with a second joining contour defined by the discharge nozzle via a joining element to securely retain the closing body holder in the discharge nozzle, the closing body holder having a cage-like shape formed by a hollow-cylindrical wall provided with a number of wall portions extending in the longitudinal direction, the valve seat circumscribing a valve opening defined by the discharge nozzle, a semi-spherical supporting surface positioned opposite the valve seat, a number of throughflow portions formed between the number of wall portions, and a first annular gap formed between the number of wall portions and a circumferential wall of the discharge nozzle and disposed between the valve seat and the second joining contour, the first annular gap tapers with respect to the longitudinal direction,
wherein the semi-spherical supporting surface is circumferentially discontinuous with the number of throughflow portions creating gaps in the semi-spherical supporting surface, and
a spherical closing body disposed in the discharge nozzle arranged movably between the valve seat and the semi-spherical supporting surface, wherein the closing body is sized to nest with the semi-spherical supporting surface
wherein a second annular gap is formed between the circumferential wall of the discharge nozzle and the number of wall portions, the second annular gap closer to an outlet opening of the discharge nozzle than the first annular gap, the second joining contour disposed between the first annular gap and the second annular gap.