Plunger device and method of making and using the same thereof
US5927957A · kind A · utility
Inventors
Key dates
| Filing date | Jun 16, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Jun 16, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/123
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
New plunger having a cylindrical hollow body 20 or 20B, a handle 30, 30A, or 30B, an outlet hose 40, an outlet tip 42, and a valve or flap 50, 60, or 70 that is able to control the air flow within the hollow 25 of the cylindrical body 20 or 20B. Valve or flap 50, 60, or 70 is moved into a closed position so that air is forced out of the front of the plunger and towards a clogged or stopped area 82 or 92 and is moved into an open position so that air enters the back of the plunger and passes valve or flap 50, 60, or 70 so that water and/or clogging material is not drawn or sucked into the interior of the plunger. First embodiment plunger 10 discloses a flexible valve flap 50 that compresses against the inner wall of the cylindrical body 20 in a closed position and flexes outwardly and away from piston plate 38 in an open position. Second embodiment plunger discloses a circular valve plate 60 that slidingly fits within inner portion of piston plate 38 wherein valve plate 60 is coupled to and controlled by handle control mechanism 64. Handle control mechanism 64 controls and places valve plate 60 in a closed position or an open position. Third embodiment plunger discloses handle 30B h…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.