Method for preassembling a composite coupling
US4740253A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1985 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Oct 7, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12944
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
There is disclosed a method of preassembling a composite coupling. The coupling has at least one heat-recoverable driver member and at least one metallic insert. The driver member is made from a nickel/titanium-based shape memory alloy having a transformation hysteresis defined by M.sub.s, M.sub.f, A.sub.s and A.sub.f temperatures. The method includes the steps of overdeforming the driver member by applying a stress sufficient to cause nonrecoverable strain in the driver member so that the A.sub.s and A.sub.f temperatures are temporarily raised to A.sub.s' and A.sub.f', respectively; removing the stress; engaging the driver member and insert; and then warming the driver and insert to a temperature less than A.sub.s'. There is also disclosed a composite coupling processed by this method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.