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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2018/066238
Kind Code:
A master cylinder, wherein a seal (52) defining a supply line (48) and the exterior of a cylinder body (15) has an inner peripheral lip (102) and an outer peripheral lip (103) protruding from an annular base (101), the inner peripheral lip (102) making sliding contact with the outer peripheral surface of a piston (18), and the outer peripheral lip (103) abutting on the peripheral groove (34) of the cylinder body (15). The length of the inner peripheral lip (102) in the axial direction of the piston is longer than that of the outer peripheral lip (103). The peripheral groove (34) is formed with an inclined surface (90b) on the supply-line-(48)-side peripheral wall (90) so that the groove width increases towards the groove opening (91) from the groove bottom (88).

OWADA Hiroshi (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
Application Number:
Publication Date:
April 12, 2018
Filing Date:
August 17, 2017
Export Citation:
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HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
B60T11/236; F16J15/3204; F16J15/3236
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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