US 11,686,311 B1
Drive shaft connector with counterweight and blades for cooling pump motor
Vannie Lu, Billerica, MA (US); George Galica, Worcester, MA (US); and Aileen Cheang, Shirley, MA (US)
Assigned to Agilent Technologies, Inc, Santa Clara, CA (US)
Filed by Agilent Technologies, Inc., Santa Clara, CA (US)
Filed on Jun. 7, 2022, as Appl. No. 17/834,858.
Int. Cl. F04C 29/00 (2006.01); F04C 18/02 (2006.01); F04C 29/04 (2006.01); F04C 15/00 (2006.01); F04C 19/00 (2006.01)
CPC F04C 29/0057 (2013.01) [F04C 15/0057 (2013.01); F04C 15/0061 (2013.01); F04C 15/0073 (2013.01); F04C 18/0215 (2013.01); F04C 29/04 (2013.01); F04C 29/045 (2013.01); F04C 2240/40 (2013.01); F04C 2240/60 (2013.01); F04C 2240/807 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fluid pump, comprising:
a pump head comprising a pump inlet, a pump outlet, and a pumping stage comprising a movable pump element, wherein the pumping stage is configured to pump a fluid from the pump inlet to the pump outlet in response to movement of the movable pump element;
a motor comprising a motor rotor a motor stator, and a motor housing enclosing the motor rotor and the motor stator;
a drive shaft comprising a front shaft end and a rear shaft end, wherein the front shaft end is coupled to the movable pump element, the rear shaft end is coupled to the motor rotor, the motor rotor is configured to drive rotation of the drive shaft about a drive axis, and the drive shaft is configured to drive movement of the movable pump element; and
a connector coupling the motor rotor and the rear shaft end, wherein the connector comprises a plate rotatable about the drive axis, a plurality of fan blades attached to the plate and configured to establish a flow of ambient air through the motor housing, and a counterweight attached to the plate.
 
20. A fluid pump, comprising:
a pump head comprising a pump inlet, a pump outlet, and a pumping stage comprising a movable pump element, wherein the pumping stage is configured to pump a fluid from the pump inlet to the pump outlet in response to movement of the movable pump element;
a motor comprising a motor rotor and a motor stator, wherein the motor rotor has a front side facing toward the pump head and a rear side facing away from the pump head;
a drive shaft comprising a front shaft end and a rear shaft end, wherein the front shaft end is coupled to the movable pump element, the rear shaft end is coupled to the motor rotor, the motor rotor is configured to drive rotation of the drive shaft about a drive axis, and the drive shaft is configured to drive movement of the movable pump element; and
a connector coupling the motor rotor and the rear shaft end, wherein the connector is positioned at the rear side of the motor rotor and comprises a plate rotatable about the drive axis, a plurality of fan blades attached to the plate, and a counterweight attached to the plate.