Gear pump having members with different hardnesses
US5785510A · kind A · utility
31Cited by
17References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1997 |
| Grant date | Jul 28, 1998 |
| Priority date | — |
| Expiry date | Jan 7, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2251/10
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An improved gear pump having members with different hardnesses includes a housing defining an internal bore with inlet and outlet passageways. A head member includes a wall between the inlet and outlet passageways and extends toward a toothed rotor. A toothed idler gear meshes with the rotor. The head member and idler gear are made of materials having a hardness greater than that of the rotor material. In one embodiment the idler gear is made of ceramic material whereas the head member and rotor are made of cast iron, with the head member treated to have a hardness greater than that of the rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.