Piston and bearing assemblies
Patent
·
OSTI ID:7083969
A four-stroke cycle engine piston assembly is described comprising a connecting rod having a generally cylindrical piston pin secured to one end of the rod, a skirt member having an outer wall with a pair of oppositely disposed piston pin receiving openings through the wall, the piston pin extending into the openings and supporting the skirt for oscillating motion about the piston pin, a head member having a crown section connected with a peripheral depending ring belt section above the skirt member and having a piston pin connecting section internally depending from the crown section and extending within the skirt member. The pin connecting section includes a pair of oppositely disposed downwardly extending pin encircling arms defining oppositely aligned pin receiving openings interconnected along upper edges by a downwardly opening saddle portion extending between the arms, and a downwardly opening arcuate primary recess of less than semicylindrical extent in the saddle portion and extending outwardly into the pin receiving openings and a part cylindrical bearing shell insert of less than semicylindrical extent in the primary recess and engaging the piston pin to carry primary axial thrust forces therebetween.
- Assignee:
- General Motors Corp., Detroit, MI
- Patent Number(s):
- US 4644853
- OSTI ID:
- 7083969
- Country of Publication:
- United States
- Language:
- English
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