Title:
VACUUM VALVE ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2019/004651
Kind Code:
A1
Abstract:
According to the present invention, a main body housing is divided into two spaces provided with first and second pistons, respectively, wherein the first piston is provided, between driving parts, in an upper space inside the main body housing, and the second piston is provided in a lower space inside the main body housing. The first and second pistons are connected by a main shaft such that a blade can be lifted or lowered by even a small amount of pressure, and thus driving efficiency is enhanced and the energy required for driving can be reduced.
Inventors:
KIM BAE JIN (KR)
CHOI KI SUN (KR)
LEE SU YEON (KR)
CHOI KI SUN (KR)
LEE SU YEON (KR)
Application Number:
PCT/KR2018/007006
Publication Date:
January 03, 2019
Filing Date:
June 21, 2018
Export Citation:
Assignee:
PRESYS CO LTD (KR)
International Classes:
F16K31/122; F16K3/02; F16K3/314; F16K51/02
Foreign References:
| JP2005098492A | 2005-04-14 | |||
| KR20070108083A | 2007-11-08 | |||
| US5626324A | 1997-05-06 | |||
| KR101357104B1 | 2014-02-12 | |||
| KR20040055587A | 2004-06-26 |
Attorney, Agent or Firm:
STYP PATENT LAW FIRM (KR)
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