Grooved gear pump
US4493625A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 6, 1982 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | Aug 6, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C15/0069
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The drive and driven gears of a pump are formed with grooves extending inward from the tips of the teeth to inside the root diameter. Thus each gear is divided into a first portion which serves solely as a drive or driven gear and a second portion which serves the two functions of a conventional pump gear, mainly to perform the pumping function and part of the drive function. Fitting within the grooves of both gears is a suction shoe which also overlies the inlet duct of the pump block and the mesh points of the first portions of the gears plus about two teeth to either side of the mesh point. The shoe separates the large portion of the pump chamber from the inlet duct.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.