Tension indicating washer improvements
US4572717A · kind A · utility
3Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1983 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Aug 4, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B31/028
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A tension indicating device which includes at least one indicating arm and reference means carried by a stamped generally frustoconical spring washer. A relieved area in the bearing surface of the washer prevents work surface irregularities from producing erroneous tension indications. The arm and reference means may mechanically engage one another and the arm may be made separately and attached to the washer. Indications made by the arm are designed to be visually discernable from a distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.