Side plate tapered twist tab fastening device for fastening side plates to the base
US4894747A · kind A · utility
10Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1988 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Oct 12, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/0207
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A molded case circuit breaker is provided with side plates having twist tabs extending downwardly from a bottom edge for fastening the side plates to the circuit breaker base. Spin plates with slots are carried by the base for receiving the twist tabs. The twist tabs are formed with a shank portion, a tapered portion and a head portion. The tapered portion defines a sloped surface which contacts the slot in the spin plate. When the twist tab is twisted, the shank is shortened drawing a wider portion of the sloped surface into the engagement with the slot to secure the side plate to the base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.