US 11,859,762 B2
Reciprocating pump with internal venting
Paul G. Conley, St. Charles, MO (US); and Keegan Sims, Belleville, IL (US)
Assigned to LINCOLN INDUSTRIAL CORPORATION, St. Louis, MO (US)
Filed by Lincoln Industrial Corporation, St. Louis, MO (US)
Filed on Aug. 31, 2020, as Appl. No. 17/007,093.
Prior Publication US 2022/0065396 A1, Mar. 3, 2022
Int. Cl. F16N 13/06 (2006.01); F16N 13/16 (2006.01); F16N 7/38 (2006.01); F16N 19/00 (2006.01); F04B 15/02 (2006.01); F04B 53/16 (2006.01)
CPC F16N 13/06 (2013.01) [F04B 15/02 (2013.01); F04B 53/16 (2013.01); F16N 7/38 (2013.01); F16N 13/16 (2013.01); F16N 19/00 (2013.01); F16N 2013/063 (2013.01); F16N 2280/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A lubricant pump for driving lubricant from a container to at least one lubricant distributor, the container having upper and lower ends and an interior storage cavity for retaining a quantity of lubricant, the pump comprising:
a housing mountable to the upper end of the container and having a vertically-extending, central bore, an outlet passage extending between the central bore and an outlet port fluidly connectable with the lubricant distributor, a vent chamber having an inlet and an outlet, a vent inlet passage extending between the central bore and the vent chamber inlet, and a vent outlet passage extending between the vent chamber outlet and a vent outlet port fluidly connectable with the container cavity; and
a movable valve element disposed within the vent chamber and displaceable along an axis between a first position in which the valve element obstructs at least one of the chamber inlet and the chamber outlet and a second position in which the chamber inlet is fluidly connected with the chamber outlet to provide an internal flow path from the central bore to the vent outlet port;
wherein the housing includes a monobloc providing the central bore, the outlet passage, the vent chamber, the vent inlet passage, and the vent outlet passage.