US 11,746,781 B2
Serviceable fluid pump
Steven Savage, Concord, NH (US); and Steven J. Cyr, Londonderry, NH (US)
Assigned to PITCO FRIALATOR, INC., Bow, NH (US)
Filed by PITCO FRIALATOR, INC., Bow, NH (US)
Filed on Apr. 15, 2020, as Appl. No. 16/848,976.
Claims priority of provisional application 62/834,459, filed on Apr. 16, 2019.
Prior Publication US 2020/0332796 A1, Oct. 22, 2020
Int. Cl. F04C 15/00 (2006.01); F04C 2/08 (2006.01)
CPC F04C 15/0003 (2013.01) [F04C 2/082 (2013.01); F04C 15/0088 (2013.01); F04C 15/0096 (2013.01); F04C 2210/1038 (2013.01); F04C 2240/81 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A serviceable pump, comprising:
a motor disposed at a first end of the serviceable pump;
a pump shaft disposed between the motor and a gear portion, translating forces from the motor to the gear portion, the gear portion disposed at an end of the pump distal to the motor, the gear portion including a plurality of interlocking gears and a conduit disposed within the gear portion to circulate fluid through the gear portion, the gear portion receiving fluid from a fluid suction line connected to a first side of the gear portion and outputting fluid using a discharge aperture connected to a fluid discharge line, the gear portion including a cooling loop aperture disposed proximate to the discharge aperture, the gear portion further including at least one conduit disposed proximate to the plurality of interlocking gears receiving fluid to lubricate the plurality of interlocking gears when fluid is circulated through the gear portion;
a drain groove disposed between a pump seal housing and the pump shaft, the drain groove receiving a cooled fluid from an external cooling loop external to all elements of the serviceable pump using a pressure created by a movement of the gears;
the external cooling loop external to all elements of the serviceable pump and surrounding a pump seal assembly and the pump shaft, the external cooling loop external to all elements of the serviceable pump receiving fluid through the cooling loop aperture to be pushed into the external cooling loop external to all elements of the serviceable pump at a first end of the external cooling loop external to all elements of the serviceable pump, and to return the cooled fluid to the gear portion through the drain groove;
the pump seal assembly connected to the external cooling loop external to all elements of the serviceable pump and having a seal cavity that allows the cooled fluid to flow through the seal cavity and along the pump shaft before the cooled fluid returns to the gear portion through the drain groove.