Isolated engine oil pump drive
US6183230A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1999 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Mar 19, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/7035
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An oil pump drive assembly for an internal combustion engine includes a source of rotational input such as a crankshaft and a splined hub mounted to the crankshaft for rotation therewith. The splined hub has male splines extending about the outer perimeter to transfer rotational load to drive an oil pump. The oil pump includes a pump body housing a gerotor pump set, which includes an internally lobed pumping annulus and a pump rotor. The pump rotor has lobes along the outer surface to engage the internally lobed pumping annulus and female splines along the inner surface which compliment and receive the male splines of the splined hub for meshing engagement to operatively connect the crankshaft and the gerotor pump set. The oil pump further includes a splined isolator ring disposed between the pump rotor and the splined hub wherein the inner periphery of the isolator ring is configured for meshing engagement with the male splines of the splined hub and the outer periphery of the isolator ring is configured for meshing engagement with the female splines of the pump rotor. The splined isolator ring operates to minimize noise generation upon impacts between the splined hub of the crank…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.