Grease gun with air bleed valve
US6834781B1 · kind B1 · utility
11Cited by
11References
20Claims
0Family size
Inventor
Key dates
| Filing date | Mar 19, 2001 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Mar 19, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16N3/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An air operated grease gun has an air bleed valve comprising a threaded stem with a longitudinal groove operable to allow air to bleed from a grease pumping chamber and a grease supply passage. Grease from a cartridge flows through the grease supply passage into the pumping chamber when air is bled from the gun whereby a plunger reciprocating in the grease pumping chamber pumps grease past a check valve into a grease dispensing tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.