Oil feeder
US10801548B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2018 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Mar 2, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C19/163
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump includes a piezoelectric element that deforms when a drive voltage is applied to it, and a reservoir that has a capacity to store lubricating oil and that is at least partially deformed elastically to change in the capacity when the piezoelectric element deforms. The pump discharges the lubricating oil when the reservoir decreases in the capacity. A drive circuit unit is switchable between an application state where the drive circuit unit applies the drive voltage to the piezoelectric element, and a release state where the drive circuit unit releases the drive voltage applied to the piezoelectric element. A controller controllably switches the drive circuit unit between the application state and the release state. An electric power storage unit stores electric power that is output from the piezoelectric element when the drive voltage applied to the piezoelectric element is released.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.