Title:
LINEAR ACTUATOR HAVING FREE FALL FUNCTION
Document Type and Number:
WIPO Patent Application WO/2019/050066
Kind Code:
A1
Abstract:
The present invention relates to a linear actuator having a free fall function and, specifically, to a linear actuator which has a piston rod member disposed at one side of a cylinder body and capable of moving back and forth and moves the piston rod member back and forth by using a rotational force of a rotary motor. When a jamming phenomenon, in which the piston rod member is stopped by the fixing of an operating screw member and a screw member, occurs, the linear actuator enables the piston rod member to free-fall in a direction in which a load is applied, so as to secure the maximum extension length of the piston rod member, thereby ensuring safety in an emergency.
Inventors:
KIM TAE JU (KR)
UM SAE BIN (KR)
KIM EUN SOO (KR)
PARK SANG JOON (KR)
UM SAE BIN (KR)
KIM EUN SOO (KR)
PARK SANG JOON (KR)
Application Number:
PCT/KR2017/009855
Publication Date:
March 14, 2019
Filing Date:
September 08, 2017
Export Citation:
Assignee:
HANWHA CORP (KR)
International Classes:
F16H25/22; F16H25/24
Foreign References:
| KR20150035812A | 2015-04-07 | |||
| US20150204427A1 | 2015-07-23 | |||
| JP2014190436A | 2014-10-06 | |||
| US20120137803A1 | 2012-06-07 | |||
| JPH11153204A | 1999-06-08 |
Other References:
See also references of EP 3530984A4
Attorney, Agent or Firm:
CHOI, Ho Suk (KR)
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