Control apparatus and fluid feeder control method
US10535810B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2017 |
| Grant date | Jan 14, 2020 |
| Priority date | — |
| Expiry date | Aug 5, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/20
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control apparatus controls driving of an oil feeding unit. The oil feeding unit includes a piezoelectric body that deforms in response to a voltage applied thereto, and a reservoir to store lubricating oil. The capacity of the reservoir changes in accordance with deformation of the piezoelectric body so as to discharge lubricating oil from the oil feeding unit. The control apparatus includes N driving circuits 71a to 71n configured to apply voltages to the piezoelectric body (where N is an integer equal to or greater than two). The N driving circuits 71a to 71n are connected in parallel to the piezoelectric body. During oil feeding, the control apparatus uses a predetermined number of the driving circuits selected from the N driving circuits. The predetermined number is smaller than N.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.