US 11,725,606 B2
Oil drain back seal and systems, assemblies, kits, and methods thereof
Suresh B. Chennagowni, Peoria, IL (US); Mandar A. Joshi, Dunlap, IL (US); Benjamin D. Stoltzfus, Dunlap, IL (US); Pradeep Chapagain, Dunlap, IL (US); and Gregory O. Potts, Washington, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on May 11, 2021, as Appl. No. 17/316,720.
Prior Publication US 2022/0364525 A1, Nov. 17, 2022
Int. Cl. F02F 11/00 (2006.01); F01M 11/02 (2006.01)
CPC F02F 11/002 (2013.01) [F01M 11/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An engine kit comprising:
a plurality of funnel seals configured to be respectively provided in drain back holes of an engine block, each of the funnel seals including:
a body defining a longitudinal opening from a top of the body to a bottom of the body,
a head portion extending outward from the top of the body, and
a lip extending outward from the bottom of the body; and
a head gasket configured to be disposed on the engine block and interface with the funnel seals such that an entirety of the lip is at a level below the head gasket for each of the funnel seals when the funnel seals are provided in the drain back holes,
wherein the longitudinal opening of the funnel seal tapers from widest at the top of the body to narrowest at the bottom of the body,
wherein an outer diameter of the body decreases between the top of the body to the bottom of the body from where the lip extends outward,
wherein for each of the funnel seals a first area of the longitudinal opening at the top of the body is greater than a second area of the longitudinal opening at the bottom of the body, and
wherein the lip extends from the bottom of the body outward and downward at an angle relative to horizontal.