US 12,215,823 B2
Heated lubricant pump
Xiaochuang Song, Jiangsu Province (CN); Ji Bao Wu, Suzhou (CN); Zaixing You, Suzhou (CN); and Jin Tian, Suzhou (CN)
Assigned to Graco Minnesota Inc., Minneapolis, MN (US)
Appl. No. 17/618,131
Filed by Graco Minnesota Inc., Minneapolis, MN (US)
PCT Filed Jun. 26, 2019, PCT No. PCT/CN2019/093010
§ 371(c)(1), (2) Date Dec. 10, 2021,
PCT Pub. No. WO2020/258076, PCT Pub. Date Dec. 30, 2020.
Prior Publication US 2022/0275907 A1, Sep. 1, 2022
Int. Cl. F16N 39/04 (2006.01); F04B 1/02 (2006.01); F04B 15/00 (2006.01); F04B 23/02 (2006.01); F16N 13/02 (2006.01); F16N 13/00 (2006.01); F16N 13/06 (2006.01)
CPC F16N 39/04 (2013.01) [F04B 1/02 (2013.01); F04B 15/00 (2013.01); F04B 23/023 (2013.01); F16N 13/02 (2013.01); F16N 13/00 (2013.01); F16N 2013/063 (2013.01); F16N 2200/12 (2013.01); F16N 2210/16 (2013.01); F16N 2250/08 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A lubricant pump comprising:
a pump base having an upper wall;
a reservoir housing mounted on the pump base, the reservoir housing and the upper wall defining a lubricant reservoir;
a first pump element at least partially disposed in the lubricant reservoir;
a first heating element disposed in the lubricant reservoir to be exposed to lubricant within the lubricant reservoir, the first heating element disposed proximate the first pump element and directly vertically below the first pump element, the first heating element disposed between the first pump element and the upper wall;
a first recess formed in the upper wall, the first heating element is disposed in the first recess such that the first heating element is retained laterally within the first recess, wherein the first heating element is vertically retained within the first recess such that the first heating element is spaced vertically from the first pump element; and
a thermal switch disposed in the pump base and electrically connected to the first heating element and configured to control activation and deactivation of the first heating element.