Plunger
US6032301A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1999 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Feb 3, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03C1/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A plunger includes an upper base, a pressure ball under the upper base, a correlative tubular shaft extending vertically through the pressure ball, a handle pivotally connected with an upper end of the correlative tubular shaft, a connecting rod connects to the correlative shaft, and a lower end stopper threadably connected with the lower end of the connecting rod. The pressure ball can store air supplied by an air pump or compressor through an air inlet. The handle can be operated to let the air stored in the pressure ball flow through the correlative shaft, the connecting rod and the lower end stopper into a clogged pipe or drain for clearing passage with a large force of pressured air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.