US 11,719,185 B2
Coating to reduce coking deposits on steel pistons
Warran Boyd Lineton, Chelsea, MI (US); and Timothy Christopher Vezina, Northville, MI (US)
Assigned to Tenneco Inc., Lake Forest, IL (US)
Filed by TENNECO INC., Lake Forest, IL (US)
Filed on Nov. 3, 2021, as Appl. No. 17/518,018.
Application 17/518,018 is a division of application No. 15/901,783, filed on Feb. 21, 2018, granted, now 11,168,643.
Prior Publication US 2022/0065192 A1, Mar. 3, 2022
Int. Cl. F02F 3/12 (2006.01); F02F 3/10 (2006.01); F02F 3/16 (2006.01)
CPC F02F 3/12 (2013.01) [F02F 3/10 (2013.01); F02F 3/16 (2013.01); F05C 2225/04 (2013.01); F05C 2253/12 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of manufacturing a piston, comprising the steps of:
providing a body portion formed of a ferrous material, the body portion including a crown presenting a combustion surface and an undercrown surface, the body portion including a ring belt region depending from the combustion surface, the body portion including a pair of pin bosses depending from the crown and spaced from one another by a pair of skirt sections, and
disposing a coating on the body portion, the coating including a fluoropolymer and having a thickness of 25 microns to 1 millimeter, wherein the coating is disposed on the body portion by spraying, dipping, brushing, ink-jet, rolling, pipetting, or transfer stamping the coating on the body portion, and
curing the coated body portion.