Connecting-rod bolt
US4018132A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1975 |
| Grant date | Apr 19, 1977 |
| Priority date | — |
| Expiry date | Jul 24, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/916
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A bolt usable for fastening connecting rods wherein an intermediate threaded portion is formed in the bolt shank between the bolt head and the fastening thread portion, which intermediate thread is reverse to and has a greater pitch than that of the fastening thread. A method of manufacturing the bolt is disclosed which comprises steps of cold heading the bolt head and rolling screw thread for fastening the big end portion of the connecting rod, further rolling the intermediate screw thread having reversed screw thread with respect to the fastening thread between the bolt head and the fastening thread and reducing the diameter of the intermediate thread through a finishing die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.