US 12,366,233 B2
Electrically operated pump for a plural component spray system
Matthew R. Theisen, Woodbury, MN (US); Arthur T. Graf, Roseville, MN (US); Bryan K. Colby, New Brighton, MN (US); Andrew J. Ericson, Andover, MN (US); Nicholas K. Studt, Moscow, ID (US); and Erich W. Beckmann, Minneapolis, MN (US)
Assigned to Graco Minnesota Inc., Minneapolis, MN (US)
Appl. No. 17/914,657
Filed by Graco Minnesota Inc., Minneapolis, MN (US)
PCT Filed Mar. 31, 2021, PCT No. PCT/US2021/025132
§ 371(c)(1), (2) Date Sep. 26, 2022,
PCT Pub. No. WO2021/202698, PCT Pub. Date Oct. 7, 2021.
Claims priority of provisional application 63/002,685, filed on Mar. 31, 2020.
Prior Publication US 2023/0125161 A1, Apr. 27, 2023
Int. Cl. F04B 13/02 (2006.01); F04B 5/02 (2006.01); F04B 17/03 (2006.01); F04B 53/14 (2006.01); H02K 7/06 (2006.01)
CPC F04B 13/02 (2013.01) [F04B 17/03 (2013.01); F04B 53/14 (2013.01); H02K 7/06 (2013.01); F04B 5/02 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A pumping system for a plural component spray system configured to receive first and second component materials and output a plural component material, the pumping system comprising:
an electric motor including a stator and a rotor, the rotor configured to rotate about a pump axis;
a first motor bearing supporting the rotor and a second motor bearing supporting the rotor, the first motor bearing disposed at least partially axially outward of the rotor and the second motor bearing disposed at least partially axially outward of the rotor;
a drive directly connected to the rotor and configured to convert a rotational output from the rotor to a linear input, the drive comprising a screw disposed coaxially with the rotor and configured to provide the linear input, wherein the screw extends through and is disposed directly radially inward of the first motor bearing and the second motor bearing, wherein an inner race of the first motor bearing is mounted on a drive nut of the drive, the drive nut disposed directly radially between the screw and the stator, and wherein an inner race of the second motor bearing is mounted on the drive nut;
a first piston of a first pump coupled to the drive to be reciprocated axially by the drive; and
a second piston of a second pump coupled to the drive to be reciprocated axially by the drive.