Linear actuator and vacuum control device
US9234586B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2014 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | Oct 21, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K51/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A linear actuator is used with a vacuum chamber in which plasma is generated. The linear actuator comprises a moving member extending between the exterior and the interior of the vacuum chamber through an opening provided in the vacuum chamber so as to be rectilinearly reciprocated, a drive section configured to reciprocate the moving member, a cover that covers the moving member, and a slide seal section that provides a seal between the interior and the exterior of the vacuum chamber while allowing the cover to slide thereon. The cover covers a range of the moving member which is moved into both of the interior and the exterior of the vacuum chamber while the moving member is reciprocated by the drive section, and an outer surface of the cover is smaller in the amount of gas adsorption per unit area than an outer surface of the moving member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.