Hollow knob
US4000539A · kind A · utility
36Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1976 |
| Grant date | Jan 4, 1977 |
| Priority date | — |
| Expiry date | Jan 29, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/82
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hollow knob is provided for use on control shafts and the like. The knob comprises two hollow sections of plastic material and a metal insert threaded for receipt of a control rod or the like. The two hollow knob sections are provided with reinforcing ribs running at right angles to one another, and readily secured at crossover points by means of sonic welding. The metal insert is held securely in place in a well in one of the two plastic portions, being firmly trapped in place, and reinforcing the plastic sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.