US 12,326,103 B2
Pressure regulator for engine lubrication system
Simon Tooley, Stockton-on-Tees (GB); Daniel McNish, Tyne & Wear (GB); and Jason Kenneth Rigg, Hartlepool (GB)
Assigned to Cummins Inc., Columbus, IN (US)
Filed by Cummins Inc., Columbus, IN (US)
Filed on Feb. 22, 2023, as Appl. No. 18/172,652.
Application 18/172,652 is a continuation of application No. PCT/US2021/070974, filed on Jul. 27, 2021.
Claims priority of provisional application 63/073,558, filed on Sep. 2, 2020.
Prior Publication US 2023/0193793 A1, Jun. 22, 2023
Int. Cl. F01M 1/16 (2006.01); F01M 1/02 (2006.01); F01M 11/02 (2006.01); F04B 53/12 (2006.01); F04D 15/00 (2006.01); F16K 31/122 (2006.01)
CPC F01M 1/16 (2013.01) [F01M 1/02 (2013.01); F01M 11/02 (2013.01); F04B 53/129 (2013.01); F04D 15/0011 (2013.01); F16K 31/1221 (2013.01); F05D 2260/96 (2013.01); F05D 2260/98 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A lubrication system for an internal combustion engine, comprising:
a reservoir from which fluid is fed by a pump for circulation through the lubrication system via a fluid flow path; and
a flow control device coupled to the fluid flow path downstream of an outlet side of the pump, the flow control device including an elongated body defining a chamber extending from a first end of the body toward a second end of the body, a plunger at the first end of the body configured to normally close the chamber at the first end of the body and to displace into the body to admit fluid through an opening at or adjacent the first end into the chamber in response to a fluid pressure in the fluid flow path exceeding a threshold, and at least one elongated aperture extending along a longitudinal axis of the body, the elongated aperture being configured to slow displacement of the plunger as the plunger progressively opens the at least one elongated aperture to allow fluid to flow from the chamber through the elongated aperture to an inlet side of the pump as the plunger is displaced into the body, wherein the at least one elongated aperture is two elongated apertures located on opposite sides of the body.