US 11,885,246 B2
Engine valve with raised ring or dimple
Jeffrey Clark Krieger, Brimfield, IL (US); Michael D. Roley, Washington, IL (US); and Kyle Michael Rader, Peoria, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Oct. 18, 2021, as Appl. No. 17/503,597.
Application 17/503,597 is a continuation of application No. 16/717,428, filed on Dec. 17, 2019, granted, now 11,215,092.
Prior Publication US 2022/0034243 A1, Feb. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F01L 3/20 (2006.01); F01L 3/02 (2006.01); B21K 1/22 (2006.01); F01L 3/06 (2006.01); F02F 1/24 (2006.01)
CPC F01L 3/20 (2013.01) [F01L 3/02 (2013.01); B21K 1/22 (2013.01); F01L 3/06 (2013.01); F01L 2301/00 (2020.05); F01L 2303/00 (2020.05); F02F 2001/245 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An engine head assembly for an internal combustion engine comprising:
an engine head having a fluid conduit formed therein; and
an engine valve including a stem, a head comprising an outer lip surface, a seating surface interposed between the stem and the outer lip surface, and a combustion surface extending from the outer lip surface on the opposite side of the head as compared to the seating surface;
wherein the combustion surface includes a first convex arcuate surface spaced away from the outer lip surface, at least partially forming a raised ring, and a first concave arcuate surface spaced away from the outer lip surface, at least partially forming a dimple, and the engine valve includes a body of revolution, defining an axis of revolution, and wherein the raised ring defines a lower axial extremity of the engine valve and the dimple defines an upper axial extremity of the combustion surface.