United States
US 12,703,048 B2
System and method for cracking a connecting rod
US 12,703,048 B2 is a granted patent from the United States Patent and Trademark Office (USPTO), dated 2026-08-11. Applicant: Toyota Jidosha Kabushiki Kaisha; Toyota Motor Engineering & Manufacturing North America, Inc. Its PDF downloads from this page without an account, up to 5 a day.
- Applicant
- Toyota Jidosha Kabushiki Kaisha; Toyota Motor Engineering & Manufacturing North America, Inc.
- Inventors
- Craig Allen Buchanan; Adam Joseph Haynes; Toshiki Fujikawa; Yasuhiro Waki; Yuya Fukaya
- Publication date
- 2026-08-11
- Filing date
- 2022-07-28
- Document type
- B2 Granted patent
- Also written as
- US 12,703,048 B2 · US12703048 · 12703048
Abstract
A method for creating a cracking line in a connecting rod includes etching, using a first pass of a laser, a groove in an inner surface of a larger bore of a connecting rod by removing material from the inner surface. The groove may be discontinuous and include a plurality of holes that are spaced apart and have different depths. The method further includes removing more material from the groove using a second pass of the laser to increase the depths of the holes, thereby increasing the stress concentration factor of the groove.
The opening of the abstract. The full text is in the PDF.
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Patent office website: United States Patent and Trademark Office (USPTO)
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