Poker vibrator with frequency transformer
US6733169B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 2003 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Apr 22, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G21/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a poker vibrator for compressing concrete. The poker vibrator comprises a vibrating housing that accommodates an unbalanced mass and an electromotor, an insulating plastic tube that links the vibrating housing to a switch cover, an electric cable that links the switch cover to a connector shell and that bears a power plug, and a frequency converter that supplies the current for the electromotor. The poker vibrator is characterized in that the switch is arranged separately from a coupling piece on the tube and not on the electric cable and/or in that at least some of the components of the frequency transformer are arranged in a transformer housing provided between the switch housing and the powerplug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.