Hollow drill for fabric and the like
US5098234A · kind A · utility
31Cited by
12References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1988 |
| Grant date | Mar 24, 1992 |
| Priority date | — |
| Expiry date | Jul 27, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/8953
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hollow drill for fabric and the like is comprised of a hollow shaft having highly polished inside and outside surfaces and an outside diameter of preferably not more than 0.130 inches. A tip having a larger outside diameter and smaller inside diameter is brazed or soldered to the shaft. The shaft is made by a continuous manufacturing method such as extrusion and the tip is machined or molded followed by finish machining.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.