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US 8,893,580 B2Granted
Thermal spray coating for connecting rod small end
AssigneeMahle International GmbH
InventorsDavid Domanchuk, Michael T. Lapp, Wolfgang Rein, Christopher Hall, Thomas Stong, Thomas J. Smith
Life of this patent
Estimating the term…
Abstract
A connecting rod having a small end and a large end, the small end including a pin bore defined by a pin bore surface. A thermal spray coating applied to at least a portion of the pin bore surface and a method of applying the thermal spray coating to the pin bore surface using a thermal spray technique.
Claims19
A connecting rod comprising:
- a small end having a piston pin bore disposed therein, the piston pin bore defined by a piston pin bore surface having a first portion and a second portion forming an entire circumference of the piston pin bore;
- a large end having a crankshaft pin bore disposed therein, the crankshaft pin bore defined by a crankshaft surface, the crankshaft pin bore being larger than the piston pin bore;
- and
- a coating applied to the first portion of the pin bore surface such that the second portion of the pin bore surface is uncoated;
- wherein the coating and the first portion of the pin bore surface are positioned along a lower portion of the piston pin bore surface such that the coating intersects a beam axis of the connecting rod, the beam axis extending between the piston pin bore and the crankshaft pin bore;
- wherein the first portion of the pin bore surface is recessed with respect to the second portion of the pin bore surface by a recess distance;
- wherein opposing ends of the first portion of the pin bore surface each terminate at a recess transition, the recess transitions each leading from the first portion of the pin bore surface to the second portion of the pin bore surface, the recess transitions each extending substantially parallel to the beam axis;
- and
- wherein the recess transitions extend substantially parallel to each other.
6 more elements
A connecting rod comprising:
- a small end having a piston pin bore disposed therein, the piston pin bore defined by a piston pin bore surface having a first portion and a second portion forming an entire circumference of the piston pin bore, wherein the first portion of the pin bore surface is recessed with respect to the second portion of the pin bore surface by a recess distance;
- a large end having a crankshaft pin bore disposed therein, the crankshaft pin bore defined by a crankshaft surface, the crankshaft pin bore being larger than the piston pin bore;
- and
- a coating applied to the first portion of the pin bore surface such that the second portion of the pin bore surface is uncoated;
- wherein the coating and the first portion of the pin bore surface are positioned along a lower portion of the piston pin bore surface such that the coating intersects a beam axis of the connecting rod, the beam axis extending between the piston pin bore and the crankshaft pin bore;
- wherein the first portion of the pin bore surface is recessed with respect to the second portion of the pin bore surface by a recess distance;
- wherein opposing ends of the first portion of the pin bore surface each terminate at a recess transition, the recess transitions each leading from the first portion of the pin bore surface to the second portion of the pin bore surface, the recess transitions each extending substantially parallel to the beam axis;
- and
- wherein the recess transitions extend substantially parallel to each other.
6 more elements
Dependencies are inferred from the claim text.