Title:
HYDRAULIC BOOSTER USING VARIABLE-VOLUME PISTON
Document Type and Number:
WIPO Patent Application WO/2021/225408
Kind Code:
A1
Abstract:
The present invention relates to a hydraulic booster using a variable-volume piston, the hydraulic booster comprising: a main cylinder (100) configured such that, if a fluid introduced into the upper portion of a main piston (101) is pressurized by a pressurizing means, the fluid in the lower portion of the main piston (101) is output; a guide (110) for guiding movements of the main piston (101), the guide (110) moving downwards separately from the main piston (101) and then being moved to the original position by a return means; a variable-volume piston (200) integrally assembled above the guide (110) such that the volume thereof increases during a downward movement and decreases during an upward movement, thereby changing the volume of the upper side of the main piston (101); and a fluid storage-and-supply unit (170) connected to fluid channels (107)(108) in the upper and lower portions of the main cylinder (100) so as to supply a fluid. This configuration boosts the pressure of the fluid discharged to the lower portion of the main cylinder (100) as a result of a volume change caused by upward/downward movements of the variable-volume piston. The pressurization means comprises: a first cylinder (120) configured such that a fluid is stored therein through fluid upper/lower ports (123)(125) in the upper and lower portions of a first piston (121), and a fluid in the supply unit (170) inversely moves in/out; a first spring (130) installed on the upper portion of the first cylinder (120) so as to be compressed when a first movable shaft (122) of the first piston (121) moves upwards, the first spring (130) moving the first piston (121) downwards by an elastic tension; and a second cylinder (140) having a pressurizing piston (141) provided on the lower portion of the first movable shaft (122) so as to operate together with the first piston (121).
Inventors:
PARK SEUNG IL (KR)
Application Number:
PCT/KR2021/005740
Publication Date:
November 11, 2021
Filing Date:
May 07, 2021
Export Citation:
Assignee:
PARK SEUNG IL (KR)
International Classes:
F03G7/00; F01B11/00; F03G1/10; F15B13/06; F15B15/22
Foreign References:
| KR20110040708A | 2011-04-20 | |||
| KR102027231B1 | 2019-10-02 | |||
| JP2007064339A | 2007-03-15 | |||
| KR20130066486A | 2013-06-20 | |||
| JP5154553B2 | 2013-02-27 | |||
| KR102148632B1 | 2020-08-26 |
Attorney, Agent or Firm:
KIM, Byung Jin et al. (KR)
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