Method of monitoring threaded fastener tightening operations
US5404643A · kind A · utility
29Cited by
15References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 29, 1994 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Aug 29, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49776
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A crankshaft bearing inspection system for confirming the presence of bearing inserts and the proper amount of bearing crush during assembly of reciprocating machines accomplished by measuring a fastener tension related function and a function fastener rotation, and evaluating the curves thus obtained to confirm and identify a characteristic signature of the bearing presence as, for example, a first constant rate of tension increase followed by a second increased constant rate of tension increase falling within expected inspection limits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.