Polymeric apparatus and method of making the same
US4566678A · kind A · utility
82Cited by
11References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1982 |
| Grant date | Jan 28, 1986 |
| Priority date | — |
| Expiry date | Aug 27, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F2236/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of producing useful hollow bodies and the resulting products. The hollow bodies are formed by providing a block of thermoplastic elastomer material having a selected initial axial height and providing the block with a selected axial core opening. An axial force is applied to said block sufficient to compress said block a substantial extent to reduce the free height of the block and expand the core opening transversely outwardly to define sidewalls for the hollow body. The axial force is removed, and the hollow body is prepared for use as a compression spring or other useful device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.