Fabrication of precision glass shells by joining glass rods
US4726829A · kind A · utility
2Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1986 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Dec 16, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B19/107
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for making uniform spherical shells. The present invention allows niform hollow spheres to be made by first making a void in a body of material. The material is heated so that the viscosity is sufficiently low so that the surface tension will transform the void into a bubble. The bubble is allowed to rise in the body until it is spherical. The excess material is removed from around the void to form a spherical shell with a uniform outside diameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.