Patent ID: 9523328
Filing Date: 2016-12-20
CPC Classification: B23P,F01L,F02F,Y10T

Claim Text:
1. An assembly method comprising: orienting a cylinder-head at a first orientation; inserting a first plurality of spring caps and a first plurality of retainer keys into the cylinder-head in the first orientation by a first robot; inserting a first plurality of valves into the cylinder-head in the first orientation by a second robot, into engagement with the first plurality of retainer keys; pressing the first plurality of spring caps to compress a first plurality of valve springs before inserting the first plurality of valves; and after inserting the first plurality of valves, partially retracting the first robot thereby expanding the first plurality of valve springs and thereby aligning the first plurality of retainer keys with grooves upon shafts of the first plurality of valves.