Gear pump or motor with tooth tips of dissimilar metal
US4682939A · kind A · utility
32Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1986 |
| Grant date | Jul 28, 1987 |
| Priority date | — |
| Expiry date | Mar 25, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2/084
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A gear pump and motor is provided having increased life and efficiency as a result of improved wiping action of the gear teeth on the inner periphery of the pump chamber. This is accomplished by providing a non-smooth surface layer of a dissimilar metal such as a carbide on the tip ends of the teeth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.