公开(公告)号：US10550859B2

公开(公告)日：2020-02-04

申请号：US16073049

申请日：2017-01-27

Applicant: ADVICS CO., LTD.

Inventor： Kimiyasu Suzuki

IPC: F15B11/10 ,  B60T13/57

Abstract: In this negative-pressure booster, one of a negative-pressure valve seat and a negative-pressure valve section has, provided thereto, one or more first protruding sections abutting against the other of the negative-pressure valve seat and negative-pressure valve section, at a site other than a first annular abutment site, in an initial state where an operational force has not been applied to an input member; and/or one of an atmospheric valve seat and an atmospheric valve section has, provided thereto, one or more second protruding sections abutting against the other of the atmospheric valve seat and atmospheric valve section, at a site other than a second annular abutment site, in the initial state where an operational force has not been applied to the input member.

公开(公告)号：US10077035B2

公开(公告)日：2018-09-18

申请号：US15305449

申请日：2015-05-29

Applicant: ADVICS CO., LTD.

Inventor： Kimiyasu Suzuki

IPC: B60T13/567 ,  B60T13/56

CPC classification number: B60T13/567 ,  B60T13/56

Abstract: The present invention addresses the problem of standardizing a front shell of a booster shell of a negative pressure-type booster device by modifying the shape of a reinforcement rib provided to the front shell so as to satisfy the demand for varying the installation pitch and installation angle of tie-rod holes with one and the same front shell. A front shell configuring a booster shell of a negative pressure-type booster device in combination with a rear shell includes a reinforcement rib formed by bending the shells, wherein the reinforcement rib is formed along a virtual ellipse of which the center is located at the center of the front shell, with the major axes of the ellipse disposed on a line connecting the centers of two tie-rod holes provided in the front shell.