Title:
NEGATIVE PRESSURE TYPE BOOSTER
Document Type and Number:
Japanese Patent JP2021003992
Kind Code:
A
Abstract:
To provide a negative pressure type booster which can improve sealability of a negative pressure valve and an atmospheric valve without increasing a reaction force in an initial operation region.SOLUTION: A spring 44 for energizing a negative pressure valve body 43 and an atmospheric valve body 43 is arranged between the negative pressure valve body 43 and the atmospheric valve body 43, and first engagement parts 71 and 710 moved integrally with a valve body 130 or second engagement parts 72 and 720 moved integrally with an input member 140, in which the first engagement parts 71 and 710 and the second engagement parts 72 and 720 are formed so as to move relative to each other, and the engagement state of the spring 44 is switched from a first state where the spring 44 is engaged with the first engagement parts 71 and 710 to a second state where the spring 44 is engaged with the second engagement parts 72 and 720 accompanied by relative movement of the input member 140 at an initial position to the valve body 130.SELECTED DRAWING: Figure 3
Inventors:
HATTORI MASABUMI
TANE DAIKI
AWAJI MASAHIRO
TANE DAIKI
AWAJI MASAHIRO
Application Number:
JP2019119383A
Publication Date:
January 14, 2021
Filing Date:
June 27, 2019
Export Citation:
Assignee:
ADVICS CO LTD
International Classes:
B60T13/57; F16F1/12; F16F3/12; F16J3/04
Domestic Patent References:
| JPH07315206A | 1995-12-05 | |||
| JPS63184175U | 1988-11-28 | |||
| JP2017197064A | 2017-11-02 | |||
| JP2002187540A | 2002-07-02 |
Foreign References:
| DE19816767A1 | 1999-10-21 |
Attorney, Agent or Firm:
Kiichi Yamamoto
Akito Takigawa
Akito Takigawa